{"id":18928,"date":"2025-04-19T01:18:25","date_gmt":"2025-04-18T17:18:25","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/18928.html"},"modified":"2025-04-19T01:18:25","modified_gmt":"2025-04-18T17:18:25","slug":"%e5%9f%ba%e4%ba%8ec%e8%af%ad%e8%a8%80%e4%bb%8e0%e5%bc%80%e5%a7%8b%e6%89%8b%e6%92%b8mqtt%e5%8d%8f%e8%ae%ae%e4%bb%a3%e7%a0%81%e8%bf%9e%e6%8e%a5%e6%a0%87%e5%87%86%e7%9a%84mqtt%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/18928.html","title":{"rendered":"\u57fa\u4e8eC\u8bed\u8a00\u4ece0\u5f00\u59cb\u624b\u64b8MQTT\u534f\u8bae\u4ee3\u7801\u8fde\u63a5\u6807\u51c6\u7684MQTT\u670d\u52a1\u5668\uff0c\u5b8c\u6210\u6570\u636e\u4e0a\u4f20\u548c\u547d\u4ee4\u4e0b\u53d1\u54cd\u5e94(\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668)"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u4e00\u3001\u524d\u8a00<\/li>\n<li>\u4e8c\u3001\u642d\u5efa\u5f00\u53d1\u73af\u5883<\/li>\n<li>\u4e09\u3001\u7f51\u7edc\u7f16\u7a0b\u57fa\u7840\u6982\u5ff5\u79d1\u666e<\/li>\n<li>\n<ul>\n<li>3.1 \u4ec0\u4e48\u662f\u7f51\u7edc\u7f16\u7a0b<\/li>\n<li>3.2 TCP \u548c UDP\u534f\u8bae\u4ecb\u7ecd<\/li>\n<li>3.3 TCP\u901a\u4fe1\u7684\u5b9e\u73b0\u8fc7\u7a0b<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001Windows\u4e0b\u7684\u7f51\u7edc\u7f16\u7a0b\u76f8\u5173API\u4ecb\u7ecd<\/li>\n<li>\n<ul>\n<li>4.1 \u5e38\u7528\u7684\u51fd\u6570\u4ecb\u7ecd<\/li>\n<li>4.2 \u51fd\u6570\u53c2\u6570\u4ecb\u7ecd<\/li>\n<li>4.3 \u7f16\u5199\u4ee3\u7801\u4f53\u9a8c\u7f51\u7edc\u7f16\u7a0b<\/li>\n<\/ul>\n<\/li>\n<li>\u4e94\u3001\u8bbf\u95ee\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668\u521b\u5efa\u4e00\u4e2a\u4ea7\u54c1\u548c\u8bbe\u5907<\/li>\n<li>\n<ul>\n<li>5.2 \u5f00\u901a\u7269\u8054\u7f51\u670d\u52a1<\/li>\n<li>5.3 \u521b\u5efa\u4ea7\u54c1<\/li>\n<li>\n<ul>\n<li>&#xff08;1&#xff09;\u521b\u5efa\u4ea7\u54c1<\/li>\n<li>&#xff08;2&#xff09;\u586b\u5199\u4ea7\u54c1\u4fe1\u606f<\/li>\n<li>&#xff08;3&#xff09;\u4ea7\u54c1\u521b\u5efa\u6210\u529f<\/li>\n<li>&#xff08;4&#xff09;\u6dfb\u52a0\u81ea\u5b9a\u4e49\u6a21\u578b<\/li>\n<\/ul>\n<\/li>\n<li>3.4 \u6dfb\u52a0\u8bbe\u5907<\/li>\n<li>\n<ul>\n<li>&#xff08;1&#xff09;\u6ce8\u518c\u8bbe\u5907<\/li>\n<li>&#xff08;2&#xff09;\u6839\u636e\u81ea\u5df1\u7684\u8bbe\u5907\u586b\u5199<\/li>\n<li>&#xff08;3&#xff09;\u4fdd\u5b58\u8bbe\u5907\u4fe1\u606f<\/li>\n<\/ul>\n<\/li>\n<li>3.5 MQTT\u534f\u8bae\u4e3b\u9898\u8ba2\u9605\u4e0e\u53d1\u5e03<\/li>\n<li>\n<ul>\n<li>&#xff08;1&#xff09;\u534e\u4e3a\u4e91\u5e73\u53f0MQTT\u534f\u8bae\u4f7f\u7528\u9650\u5236<\/li>\n<li>&#xff08;2&#xff09;\u4e3b\u9898\u8ba2\u9605\u683c\u5f0f<\/li>\n<li>&#xff08;3&#xff09;\u4e3b\u9898\u53d1\u5e03\u683c\u5f0f<\/li>\n<\/ul>\n<\/li>\n<li>3.6 MQTT\u4e09\u5143\u7ec4<\/li>\n<li>\n<ul>\n<li>&#xff08;1&#xff09;MQTT\u670d\u52a1\u5668\u5730\u5740<\/li>\n<li>&#xff08;2&#xff09;\u751f\u6210MQTT\u4e09\u5143\u7ec4<\/li>\n<li>&#xff08;3&#xff09;MQTT\u767b\u5f55\u6d4b\u8bd5\u53c2\u6570\u603b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u516d\u3001\u5f00\u59cb\u5b66\u4e60MQTT\u534f\u8bae<\/li>\n<li>\n<ul>\n<li>6.1 \u5148\u4e86\u89e3\u4e0bMQTT\u534f\u8bae<\/li>\n<li>6.2 MQTT\u534f\u8bae\u5b98\u7f51\u4ecb\u7ecd<\/li>\n<li>6.3 \u9700\u8981\u5b9e\u73b0\u76843\u4e2a\u51fd\u6570<\/li>\n<li>6.4 \u67e5\u770b\u534f\u8bae\u6587\u6863&#xff0c;\u4e86\u89e3\u5982\u4f55\u7ec4\u5408\u534f\u8bae\u62a5\u6587<\/li>\n<li>6.5 \u5b9e\u73b0&#096;MQTT_Connect&#096;\u51fd\u6570<\/li>\n<li>\n<ul>\n<li>\u30101\u3011\u56fa\u5b9a\u62a5\u6587\u5934<\/li>\n<li>\u30102\u3011\u534f\u8bae\u540d<\/li>\n<li>\u30103\u3011\u534f\u8bae\u7ea7\u522b<\/li>\n<li>\u30104\u3011\u8fde\u63a5\u6807\u5fd7<\/li>\n<li>\u30105\u3011\u4fdd\u6301\u8fde\u63a5\u7684\u65f6\u95f4<\/li>\n<li>\u30106\u3011 \u53ef\u53d8\u62a5\u5934\u975e\u89c4\u8303\u793a\u4f8b<\/li>\n<li>\u30107\u3011\u6700\u540e\u90e8\u5206&#xff1a;\u586b\u5199\u5ba2\u6237\u7aefID\u3001\u7528\u6237\u540d\u3001\u5bc6\u7801\u3002<\/li>\n<li>\u30108\u3011\u54cd\u5e94<\/li>\n<li>\u30109\u3011\u5b8c\u6574\u4ee3\u7801<\/li>\n<\/ul>\n<\/li>\n<li>6.6 \u5b9e\u73b0MQTT_PublishData\u51fd\u6570<\/li>\n<li>\n<ul>\n<li>\u30101\u3011\u67e5\u770b\u6587\u6863\u8bf4\u660e<\/li>\n<li>\u30102\u3011\u56fa\u5b9a\u62a5\u6587\u5934<\/li>\n<li>\u30103\u3011\u5269\u4f59\u5b57\u6bb5\u957f\u5ea6<\/li>\n<li>\u30104\u3011\u53ef\u53d8\u62a5\u5934<\/li>\n<li>\u30105\u3011\u5b8c\u6574\u4ee3\u7801<\/li>\n<li>\u30106\u3011\u53d1\u5e03\u786e\u8ba4<\/li>\n<\/ul>\n<\/li>\n<li>6.7 \u5b9e\u73b0 MQTT_SubscribeTopic \u51fd\u6570<\/li>\n<li>\n<ul>\n<li>\u30101\u3011\u67e5\u770b\u6587\u6863&#xff1a;\u8ba2\u9605\u4e3b\u9898\u7684\u683c\u5f0f<\/li>\n<li>\u30102\u3011\u67e5\u770b\u6587\u6863&#xff1a;\u53d6\u6d88\u8ba2\u9605\u7684\u683c\u5f0f<\/li>\n<li>\u30103\u3011\u56fa\u5b9a\u62a5\u5934<\/li>\n<li>\u30104\u3011\u53ef\u53d8\u62a5\u5934<\/li>\n<li>\u30105\u3011\u5b8c\u6574\u4ee3\u7801<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u4e03\u3001\u8fd0\u884c\u9879\u76ee\u3001\u8fde\u63a5\u534e\u4e3a\u4e91\u670d\u52a1\u5668<\/li>\n<li>\n<ul>\n<li>7.1 \u6574\u4e2a\u9879\u76ee\u7684\u5b8c\u6574\u4ee3\u7801<\/li>\n<li>7.2 \u4ee3\u7801\u91cc\u6838\u5fc3\u7684\u5730\u65b9<\/li>\n<li>7.3 \u7f16\u8bd1\u8fd0\u884c\u4ee3\u7801<\/li>\n<li>7.4 \u767b\u5f55\u534e\u4e3a\u4e91IOT\u4e91\u7aef\u67e5\u770b\u6570\u636e<\/li>\n<\/ul>\n<\/li>\n<li>\u516b\u3001\u4e0b\u53d1\u547d\u4ee4\u7684\u5904\u7406<\/li>\n<li>\n<ul>\n<li>8.1 \u6dfb\u52a0\u547d\u4ee4<\/li>\n<li>8.2 \u4e0b\u53d1\u547d\u4ee4\u6d4b\u8bd5<\/li>\n<li>8.3 \u7f16\u5199\u4ee3\u7801<\/li>\n<li>8.4 \u8fd0\u884c\u4ee3\u7801\u6d4b\u8bd5<\/li>\n<\/ul>\n<\/li>\n<li>\u4e5d\u3001\u603b\u7ed3<\/li>\n<\/ul>\n<\/p>\n<p>\u4ece0\u5f00\u59cb\u7f16\u5199MQTT\u534f\u8bae\u4ee3\u7801\u8fde\u63a5\u6807\u51c6MQTT\u670d\u52a1\u5668(\u7cbe\u8bb2MQTT\u534f\u8bae)<\/p>\n<\/p>\n<h2>\u4e00\u3001\u524d\u8a00<\/h2>\n<p>\u8fd1\u5e74\u6765&#xff0c;\u7269\u8054\u7f51\u7684\u53d1\u5c55\u5982\u706b\u5982\u837c&#xff0c;\u5df2\u7ecf\u6e17\u900f\u5230\u6211\u4eec\u751f\u6d3b\u7684\u65b9\u65b9\u9762\u9762\u3002\u4ece\u667a\u80fd\u5bb6\u5c45\u5230\u5de5\u4e1a\u81ea\u52a8\u5316&#xff0c;\u4ece\u667a\u6167\u57ce\u5e02\u5230\u667a\u6167\u519c\u4e1a&#xff0c;\u7269\u8054\u7f51\u6b63\u5728\u4ee5\u524d\u6240\u672a\u6709\u7684\u901f\u5ea6\u6539\u53d8\u7740\u6211\u4eec\u7684\u751f\u6d3b\u3002 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decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171813-680289552db35.png\" alt=\"image-20230913173131481\" \/><\/p>\n<p>\u56e0\u4e3a\u6211\u8fd9\u91cc\u53ea\u9700\u8981\u7528\u5230C&#043;&#043;\u548cC\u8bed\u8a00\u7f16\u7a0b&#xff0c;\u90a3\u4e48\u5b89\u88c5\u7684\u65f6\u5019\u53ef\u4ee5\u81ea\u5df1\u9009\u62e9\u9700\u8981\u5b89\u88c5\u7684\u5305\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171813-68028955c5144.png\" alt=\"image-20230913173258088\" \/><\/p>\n<p>\u5b89\u88c5\u597d\u4e4b\u540e&#xff0c;\u521b\u5efa\u9879\u76ee\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171814-680289561cfcf.png\" alt=\"image-20230913173330580\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171814-68028956722b4.png\" alt=\"image-20230913173349914\" 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\u5728OSI\u6a21\u578b\u4e2d&#xff0c;\u4f20\u8f93\u5c42\u662f\u7b2c\u56db\u5c42&#xff0c;\u8d1f\u8d23\u603b\u4f53\u6570\u636e\u4f20\u8f93\u548c\u6570\u636e\u63a7\u5236&#xff0c;\u4e3a\u4f1a\u8bdd\u5c42\u7b49\u9ad8\u4e09\u5c42\u63d0\u4f9b\u53ef\u9760\u7684\u4f20\u8f93\u670d\u52a1&#xff0c;\u4e3a\u7f51\u7edc\u5c42\u63d0\u4f9b\u53ef\u9760\u7684\u76ee\u7684\u5730\u70b9\u4fe1\u606f\u3002\u5728TCP\/IP\u534f\u8bae\u65cf\u4e2d&#xff0c;TCP\u548cUDP\u6b63\u662f\u4f4d\u4e8e\u8fd9\u4e00\u5c42\u7684\u534f\u8bae\u3002<\/p>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4ecb\u7ecd TCP \u548c UDP \u534f\u8bae \u4ee5\u53ca \u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171814-68028956c5519.png\" alt=\"img\" \/><\/p>\n<h3>3.2 TCP \u548c UDP\u534f\u8bae\u4ecb\u7ecd<\/h3>\n<p>TCP\u534f\u8bae&#xff1a;<\/p>\n<p>TCP&#xff08;\u4f20\u8f93\u63a7\u5236\u534f\u8bae&#xff09;\u662f\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684\u3001\u53ef\u9760\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u3002\u5728\u4f20\u8f93\u6570\u636e\u4e4b\u524d\u9700\u8981\u5148\u5efa\u7acb\u8fde\u63a5&#xff0c;\u786e\u4fdd\u6570\u636e\u7684\u987a\u5e8f\u548c\u5b8c\u6574\u6027\u3002TCP\u901a\u8fc7\u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u8fde\u63a5&#xff0c;\u5e76\u901a\u8fc7\u786e\u8ba4\u3001\u8d85\u65f6\u548c\u91cd\u4f20\u673a\u5236\u786e\u4fdd\u6570\u636e\u7684\u53ef\u9760\u4f20\u8f93\u3002TCP\u91c7\u7528\u6d41\u91cf\u63a7\u5236\u548c\u62e5\u585e\u63a7\u5236\u673a\u5236&#xff0c;\u4ee5\u907f\u514d\u7f51\u7edc\u62e5\u585e&#xff0c;\u786e\u4fdd\u6570\u636e\u7684\u987a\u5229\u4f20\u8f93\u3002\u56e0\u4e3aTCP\u7684\u8fd9\u4e9b\u7279\u6027&#xff0c;\u901a\u5e38\u88ab\u5e94\u7528\u4e8e\u9700\u8981\u9ad8\u53ef\u9760\u6027\u548c\u987a\u5e8f\u6027\u7684\u5e94\u7528&#xff0c;\u5982\u7f51\u9875\u6d4f\u89c8\u3001\u7535\u5b50\u90ae\u4ef6\u7b49\u3002<\/p>\n<p>UDP\u534f\u8bae&#xff1a;<\/p>\n<p>UDP&#xff08;\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae&#xff09;\u662f\u4e00\u79cd\u65e0\u8fde\u63a5\u7684\u3001\u4e0d\u53ef\u9760\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u3002\u4e0eTCP\u4e0d\u540c&#xff0c;UDP\u5728\u4f20\u8f93\u6570\u636e\u4e4b\u524d\u4e0d\u9700\u8981\u5efa\u7acb\u8fde\u63a5&#xff0c;\u76f4\u63a5\u5c06\u6570\u636e\u6253\u5305\u6210\u6570\u636e\u62a5\u5e76\u53d1\u9001\u51fa\u53bb\u3002\u56e0\u6b64&#xff0c;UDP\u6ca1\u6709TCP\u7684\u90a3\u4e9b\u786e\u8ba4\u3001\u8d85\u65f6\u548c\u91cd\u4f20\u673a\u5236&#xff0c;\u4e5f\u5c31\u4e0d\u4fdd\u8bc1\u6570\u636e\u7684\u53ef\u9760\u4f20\u8f93\u3002UDP\u4e5f\u6ca1\u6709TCP\u7684\u6d41\u91cf\u63a7\u5236\u548c\u62e5\u585e\u63a7\u5236\u673a\u5236\u3002\u56e0\u4e3aUDP\u7684\u7b80\u5355\u6027\u548c\u9ad8\u6548\u6027&#xff0c;\u901a\u5e38\u88ab\u5e94\u7528\u4e8e\u5b9e\u65f6\u6027\u8981\u6c42\u8f83\u9ad8&#xff0c;\u4f46\u5bf9\u6570\u636e\u53ef\u9760\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u5e94\u7528&#xff0c;\u5982\u8bed\u97f3\u901a\u8bdd\u3001\u89c6\u9891\u76f4\u64ad\u7b49\u3002<\/p>\n<h3>3.3 TCP\u901a\u4fe1\u7684\u5b9e\u73b0\u8fc7\u7a0b<\/h3>\n<p>\u8981\u5b9e\u73b0TCP\u901a\u4fe1&#xff0c;\u4e24\u7aef\u5fc5\u987b\u8981\u77e5\u9053\u5bf9\u65b9\u7684IP\u548c\u7aef\u53e3\u53f7&#xff1a;<\/p>\n<p>&#xff08;1&#xff09;IP\u5730\u5740&#xff1a;TCP\u534f\u8bae\u662f\u57fa\u4e8eIP\u534f\u8bae\u8fdb\u884c\u901a\u4fe1\u7684&#xff0c;\u56e0\u6b64\u9700\u8981\u77e5\u9053\u5bf9\u65b9\u7684IP\u5730\u5740&#xff0c;\u624d\u80fd\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n<p>&#xff08;2&#xff09;\u7aef\u53e3\u53f7&#xff1a;\u6bcf\u4e2aTCP\u8fde\u63a5\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u7aef\u53e3\u53f7&#xff0c;\u7528\u4e8e\u6807\u8bc6\u8fdb\u7a0b\u548c\u5e94\u7528\u7a0b\u5e8f\u3002\u5efa\u7acb\u8fde\u63a5\u65f6&#xff0c;\u9700\u8981\u6307\u5b9a\u672c\u5730\u7aef\u53e3\u53f7\u548c\u8fdc\u7aef\u7aef\u53e3\u53f7\u3002<\/p>\n<p>&#xff08;3&#xff09;\u5e94\u7528\u5c42\u534f\u8bae&#xff1a;TCP\u534f\u8bae\u53ea\u63d0\u4f9b\u6570\u636e\u4f20\u8f93\u670d\u52a1&#xff0c;\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u5b9a\u4e49\u81ea\u5df1\u7684\u5e94\u7528\u5c42\u534f\u8bae&#xff0c;\u7528\u4e8e\u89e3\u6790\u62a5\u6587\u548c\u5904\u7406\u6570\u636e\u3002\u4f8b\u5982&#xff0c;HTTP\u534f\u8bae\u5c31\u662f\u57fa\u4e8eTCP\u534f\u8bae\u7684\u5e94\u7528\u5c42\u534f\u8bae\u3002<\/p>\n<p>\u5728\u6b63\u5e38\u7684TCP\u901a\u4fe1\u8fc7\u7a0b\u4e2d&#xff0c;\u7b2c\u4e00\u6b65\u9700\u8981\u5efa\u7acb\u8fde\u63a5&#xff0c;\u8fd9\u4e2a\u8fc7\u7a0b\u79f0\u4e3a\u201c\u4e09\u6b21\u63e1\u624b\u201d\u3002\u5efa\u7acb\u8fde\u63a5\u65f6&#xff0c;\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2aSYN\u5305&#xff0c;\u8868\u793a\u8bf7\u6c42\u5efa\u7acb\u8fde\u63a5&#xff1b;\u670d\u52a1\u5668\u63a5\u6536\u5230SYN\u5305\u540e&#xff0c;\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2aACK\u5305&#xff0c;\u8868\u793a\u786e\u8ba4\u6536\u5230\u4e86SYN\u5305&#xff1b;\u6700\u540e\u5ba2\u6237\u7aef\u518d\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2aACK\u5305&#xff0c;\u8868\u793a\u786e\u8ba4\u6536\u5230\u4e86\u670d\u52a1\u5668\u7684ACK\u5305&#xff0c;\u6b64\u65f6\u8fde\u63a5\u5efa\u7acb\u6210\u529f\u3002\u5efa\u7acb\u8fde\u63a5\u540e&#xff0c;\u6570\u636e\u4f20\u8f93\u5c31\u53ef\u4ee5\u5f00\u59cb\u4e86\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171815-680289571e7d5.png\" alt=\"img\" \/><\/p>\n<h2>\u56db\u3001Windows\u4e0b\u7684\u7f51\u7edc\u7f16\u7a0b\u76f8\u5173API\u4ecb\u7ecd<\/h2>\n<p>\u56e0\u4e3a\u5f53\u524d\u6587\u7ae0\u662f\u5728Windows\u4e0b\u4ecb\u7ecdMQTT\u534f\u8bae&#xff0c;\u8981\u7528\u5230\u7f51\u7edc\u7f16\u7a0b\u7684\u77e5\u8bc6&#xff0c;\u9700\u8981\u4f7f\u7528Windows\u7cfb\u7edf\u63d0\u4f9b\u7684API\u5b8c\u6210\u7f51\u7edc\u7f16\u7a0b\u3002Windows\u672c\u8eab\u5c31\u6709\u4e00\u5957\u539f\u751f\u7684\u7f51\u7edc\u7f16\u7a0b\u63a5\u53e3\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u3002 \u5728Linux\u7cfb\u7edf\u4e0b\u4e5f\u662f\u4e00\u6837&#xff0c;\u90fd\u6709\u81ea\u5df1\u4e00\u5957\u539f\u751f\u7684\u7f51\u7edc\u7f16\u7a0b\u63a5\u53e3\u3002<\/p>\n<p>\u5982\u679c\u6ca1\u6709\u63a5\u89e6\u8fd9\u4e9bAPI\u7684\u5c0f\u4f19\u4f34\u4e0d\u7528\u614c~~~\u3002 \u4f60\u81f3\u5c11\u7528\u8fc7C\u8bed\u8a00\u91cc\u7684printf\u3001scanf\u3001strlen\u4e4b\u7c7b\u7684\u51fd\u6570\u5427&#xff1f; \u4e0b\u9762\u4ecb\u7ecd\u7684\u8fd9\u4e9b\u7f51\u7edc\u7f16\u7a0bAPI\u51fd\u6570\u5176\u5b9e\u548c\u5b83\u4eec\u6ca1\u4ec0\u4e48\u533a\u522b&#xff0c;\u90fd\u662f\u666e\u901a\u7684\u51fd\u6570&#xff0c;\u529f\u80fd\u4e0d\u4e00\u6837\u800c\u5df2\u3002 \u5bf9\u4f60\u6765\u8bf4&#xff0c;\u53ea\u662f\u591a\u5b66\u4e86\u51e0\u4e2a\u5e93\u51fd\u6570&#xff0c;\u53ea\u8981\u4e86\u89e3\u6bcf\u4e2a\u51fd\u6570\u7684\u529f\u80fd\u5c31\u53ef\u4ee5\u8c03\u7528\u4e86\u3002<\/p>\n<p>\u90a3\u4e48\u63a5\u4e0b\u6765\u5c31\u5b66\u4e60\u4e00\u4e0b\u5e38\u7528\u7684\u7f51\u7edc\u7f16\u7a0b\u76f8\u5173\u7684\u51fd\u6570\u3002<\/p>\n<p>\u5fae\u8f6f\u7684\u5b98\u65b9\u6587\u6863\u5730\u5740&#xff1a;https:\/\/learn.microsoft.com\/zh-cn\/windows\/win32\/api\/_winsock\/<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171815-680289575a51c.png\" alt=\"image-20231031132547022\" \/><\/p>\n<h3>4.1 \u5e38\u7528\u7684\u51fd\u6570\u4ecb\u7ecd<\/h3>\n<p>\u5728Windows\u4e0b\u8fdb\u884c\u7f51\u7edc\u7f16\u7a0b&#xff0c;\u53ef\u4ee5\u4f7f\u7528Winsock API&#xff08;Windows Sockets API&#xff09;\u6765\u5b9e\u73b0\u3002Winsock API\u662fWindows\u5e73\u53f0\u4e0a\u7684\u6807\u51c6\u7f51\u7edc\u7f16\u7a0b\u63a5\u53e3&#xff0c;\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u51fd\u6570\u548c\u6570\u636e\u7ed3\u6784&#xff0c;\u7528\u4e8e\u521b\u5efa\u3001\u8fde\u63a5\u3001\u53d1\u9001\u548c\u63a5\u6536\u7f51\u7edc\u6570\u636e\u7b49\u64cd\u4f5c\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u5e38\u7528\u7684Winsock API\u63a5\u53e3\u51fd\u6570&#xff1a;<\/p>\n<p>(1)WSAStartup&#xff1a;\u521d\u59cb\u5316Winsock\u5e93&#xff0c;\u5fc5\u987b\u5728\u4f7f\u7528\u5176\u4ed6Winsock\u51fd\u6570\u4e4b\u524d\u8c03\u7528\u3002<\/p>\n<p>(2)socket&#xff1a;\u521b\u5efa\u4e00\u4e2a\u5957\u63a5\u5b57&#xff0c;\u7528\u4e8e\u7f51\u7edc\u901a\u4fe1\u3002<\/p>\n<p>(3)bind&#xff1a;\u5c06\u5957\u63a5\u5b57\u4e0e\u672c\u5730\u5730\u5740&#xff08;IP\u5730\u5740\u548c\u7aef\u53e3\u53f7&#xff09;\u7ed1\u5b9a\u3002<\/p>\n<p>(4)listen&#xff1a;\u5f00\u59cb\u76d1\u542c\u8fde\u63a5\u8bf7\u6c42&#xff0c;\u5c06\u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u88ab\u52a8\u6a21\u5f0f\u3002<\/p>\n<p>(5)accept&#xff1a;\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42&#xff0c;\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5957\u63a5\u5b57\u7528\u4e8e\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u3002<\/p>\n<p>(6)connect&#xff1a;\u4e0e\u8fdc\u7a0b\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n<p>(7)send&#xff1a;\u53d1\u9001\u6570\u636e\u5230\u5df2\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u3002<\/p>\n<p>(8)recv&#xff1a;\u4ece\u5df2\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u63a5\u6536\u6570\u636e\u3002<\/p>\n<p>(9)sendto&#xff1a;\u53d1\u9001\u6570\u636e\u5230\u6307\u5b9a\u7684\u76ee\u6807\u5730\u5740\u3002<\/p>\n<p>(10)recvfrom&#xff1a;\u4ece\u6307\u5b9a\u7684\u5730\u5740\u63a5\u6536\u6570\u636e\u3002<\/p>\n<p>(11)closesocket&#xff1a;\u5173\u95ed\u5957\u63a5\u5b57\u3002<\/p>\n<p>(12)getaddrinfo&#xff1a;\u6839\u636e\u4e3b\u673a\u540d\u548c\u670d\u52a1\u540d\u83b7\u53d6\u5730\u5740\u4fe1\u606f\u3002<\/p>\n<p>(13)gethostbyname&#xff1a;\u6839\u636e\u4e3b\u673a\u540d\u83b7\u53d6\u4e3b\u673a\u7684IP\u5730\u5740\u3002<\/p>\n<p>(14)gethostname&#xff1a;\u83b7\u53d6\u672c\u5730\u4e3b\u673a\u540d\u3002<\/p>\n<h3>4.2 \u51fd\u6570\u53c2\u6570\u4ecb\u7ecd<\/h3>\n<p>\u4e0b\u9762\u662f\u5e38\u7528\u7684\u51e0\u4e2aWinsock API\u51fd\u6570\u53ca\u5176\u51fd\u6570\u539f\u578b\u548c\u53c2\u6570\u542b\u4e49\u7684\u4ecb\u7ecd&#xff1a;<\/p>\n<p>&#xff08;1&#xff09;WSAStartup&#xff1a;<\/p>\n<p>int WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData);<\/p>\n<ul>\n<li>wVersionRequested&#xff1a;\u8bf7\u6c42\u7684Winsock\u7248\u672c\u53f7\u3002<\/li>\n<li>lpWSAData&#xff1a;\u6307\u5411WSADATA\u7ed3\u6784\u7684\u6307\u9488&#xff0c;\u7528\u4e8e\u63a5\u6536\u521d\u59cb\u5316\u7ed3\u679c\u548c\u76f8\u5173\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<p>&#xff08;2&#xff09;socket&#xff1a;<\/p>\n<p>SOCKET socket(int af, int type, int protocol);<\/p>\n<ul>\n<li>af&#xff1a;\u5730\u5740\u65cf&#xff08;Address Family&#xff09;&#xff0c;\u5982AF_INET\u8868\u793aIPv4\u3002<\/li>\n<li>type&#xff1a;\u5957\u63a5\u5b57\u7c7b\u578b&#xff0c;\u5982SOCK_STREAM\u8868\u793a\u9762\u5411\u8fde\u63a5\u7684TCP\u5957\u63a5\u5b57\u3002<\/li>\n<li>protocol&#xff1a;\u6307\u5b9a\u534f\u8bae\u3002\u901a\u5e38\u4e3a0&#xff0c;\u8868\u793a\u6839\u636etype\u81ea\u52a8\u9009\u62e9\u5408\u9002\u7684\u534f\u8bae\u3002<\/li>\n<\/ul>\n<p>&#xff08;3&#xff09;bind&#xff1a;<\/p>\n<p>int bind(SOCKET s, const struct sockaddr* name, int namelen);<\/p>\n<ul>\n<li>s&#xff1a;\u8981\u7ed1\u5b9a\u7684\u5957\u63a5\u5b57\u3002<\/li>\n<li>name&#xff1a;\u6307\u5411sockaddr\u7ed3\u6784\u7684\u6307\u9488&#xff0c;\u5305\u542b\u8981\u7ed1\u5b9a\u7684\u672c\u5730\u5730\u5740\u4fe1\u606f\u3002<\/li>\n<li>namelen&#xff1a;name\u7ed3\u6784\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<p>&#xff08;4&#xff09;listen&#xff1a;<\/p>\n<p>int listen(SOCKET s, int backlog);<\/p>\n<ul>\n<li>s&#xff1a;\u8981\u76d1\u542c\u7684\u5957\u63a5\u5b57\u3002<\/li>\n<li>backlog&#xff1a;\u7b49\u5f85\u8fde\u63a5\u961f\u5217\u7684\u6700\u5927\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<p>&#xff08;5&#xff09;accept&#xff1a;<\/p>\n<p>SOCKET accept(SOCKET s, struct sockaddr* addr, int* addrlen);<\/p>\n<ul>\n<li>s&#xff1a;\u76d1\u542c\u5957\u63a5\u5b57\u3002<\/li>\n<li>addr&#xff1a;\u7528\u4e8e\u5b58\u50a8\u5ba2\u6237\u7aef\u5730\u5740\u4fe1\u606f\u7684sockaddr\u7ed3\u6784\u3002<\/li>\n<li>addrlen&#xff1a;addr\u7ed3\u6784\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<p>&#xff08;6&#xff09;connect&#xff1a;<\/p>\n<p>int connect(SOCKET s, const struct sockaddr* name, int namelen);<\/p>\n<ul>\n<li>s&#xff1a;\u8981\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u3002<\/li>\n<li>name&#xff1a;\u6307\u5411\u76ee\u6807\u5730\u5740\u4fe1\u606f\u7684sockaddr\u7ed3\u6784\u6307\u9488\u3002<\/li>\n<li>namelen&#xff1a;name\u7ed3\u6784\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<p>&#xff08;7&#xff09;send&#xff1a;<\/p>\n<p>int send(SOCKET s, const char* buf, int len, int flags);<\/p>\n<ul>\n<li>s&#xff1a;\u8981\u53d1\u9001\u6570\u636e\u7684\u5957\u63a5\u5b57\u3002<\/li>\n<li>buf&#xff1a;\u8981\u53d1\u9001\u7684\u6570\u636e\u7f13\u51b2\u533a\u3002<\/li>\n<li>len&#xff1a;\u8981\u53d1\u9001\u7684\u6570\u636e\u957f\u5ea6\u3002<\/li>\n<li>flags&#xff1a;\u989d\u5916\u9009\u9879&#xff0c;\u5982MSG_DONTROUTE\u7b49\u3002<\/li>\n<\/ul>\n<p>&#xff08;8&#xff09;recv&#xff1a;<\/p>\n<p>int recv(SOCKET s, char* buf, int len, int flags);<\/p>\n<ul>\n<li>s&#xff1a;\u8981\u63a5\u6536\u6570\u636e\u7684\u5957\u63a5\u5b57\u3002<\/li>\n<li>buf&#xff1a;\u7528\u4e8e\u5b58\u50a8\u63a5\u6536\u6570\u636e\u7684\u7f13\u51b2\u533a\u3002<\/li>\n<li>len&#xff1a;\u8981\u63a5\u6536\u7684\u6570\u636e\u957f\u5ea6\u3002<\/li>\n<li>flags&#xff1a;\u989d\u5916\u9009\u9879\u3002<\/li>\n<\/ul>\n<p>&#xff08;9&#xff09;sendto&#xff1a;<\/p>\n<p>int sendto(SOCKET s, const char* buf, int len, int flags, const struct sockaddr* to, int tolen);<\/p>\n<ul>\n<li>s&#xff1a;\u8981\u53d1\u9001\u6570\u636e\u7684\u5957\u63a5\u5b57\u3002<\/li>\n<li>buf&#xff1a;\u8981\u53d1\u9001\u7684\u6570\u636e\u7f13\u51b2\u533a\u3002<\/li>\n<li>len&#xff1a;\u8981\u53d1\u9001\u7684\u6570\u636e\u957f\u5ea6\u3002<\/li>\n<li>flags&#xff1a;\u989d\u5916\u9009\u9879\u3002<\/li>\n<li>to&#xff1a;\u6307\u5411\u76ee\u6807\u5730\u5740\u4fe1\u606f\u7684sockaddr\u7ed3\u6784\u6307\u9488\u3002<\/li>\n<li>tolen&#xff1a;to\u7ed3\u6784\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<p>&#xff08;10&#xff09;recvfrom&#xff1a;<\/p>\n<p>int recvfrom(SOCKET s, char* buf, int len, int flags, struct sockaddr* from, int* fromlen);<\/p>\n<ul>\n<li>s&#xff1a;\u8981\u63a5\u6536\u6570\u636e\u7684\u5957\u63a5\u5b57\u3002<\/li>\n<li>buf&#xff1a;\u7528\u4e8e\u5b58\u50a8\u63a5\u6536\u6570\u636e\u7684\u7f13\u51b2\u533a\u3002<\/li>\n<li>len&#xff1a;\u8981\u63a5\u6536\u7684\u6570\u636e\u957f\u5ea6\u3002<\/li>\n<li>flags&#xff1a;\u989d\u5916\u9009\u9879\u3002<\/li>\n<li>from&#xff1a;\u7528\u4e8e\u5b58\u50a8\u53d1\u9001\u65b9\u5730\u5740\u4fe1\u606f\u7684sockaddr\u7ed3\u6784\u6307\u9488\u3002<\/li>\n<li>fromlen&#xff1a;from\u7ed3\u6784\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<p>&#xff08;11&#xff09;closesocket&#xff1a;<\/p>\n<p>int closesocket(SOCKET s);<\/p>\n<ul>\n<li>s&#xff1a;\u8981\u5173\u95ed\u7684\u5957\u63a5\u5b57\u3002<\/li>\n<\/ul>\n<p>&#xff08;12&#xff09;getaddrinfo&#xff1a;<\/p>\n<p>int getaddrinfo(const char* nodename, const char* servname, const struct addrinfo* hints, struct addrinfo** res);<\/p>\n<ul>\n<li>nodename&#xff1a;\u76ee\u6807\u4e3b\u673a\u540d\u6216IP\u5730\u5740\u3002<\/li>\n<li>servname&#xff1a;\u670d\u52a1\u540d\u6216\u7aef\u53e3\u53f7\u3002<\/li>\n<li>hints&#xff1a;\u6307\u5411addrinfo\u7ed3\u6784\u7684\u6307\u9488&#xff0c;\u63d0\u4f9b\u5173\u4e8e\u5730\u5740\u67e5\u627e\u7684\u63d0\u793a\u3002<\/li>\n<li>res&#xff1a;\u6307\u5411addrinfo\u7ed3\u6784\u94fe\u8868\u7684\u6307\u9488&#xff0c;\u7528\u4e8e\u63a5\u6536\u67e5\u627e\u7ed3\u679c\u3002<\/li>\n<\/ul>\n<p>&#xff08;13&#xff09;gethostbyname&#xff1a;<\/p>\n<p>struct hostent* gethostbyname(const char* name);<\/p>\n<ul>\n<li>name&#xff1a;\u8981\u67e5\u8be2\u7684\u4e3b\u673a\u540d\u3002<\/li>\n<\/ul>\n<p>&#xff08;14&#xff09;gethostname&#xff1a;<\/p>\n<p>int gethostname(char* name, int namelen);<\/p>\n<ul>\n<li>name&#xff1a;\u7528\u4e8e\u63a5\u6536\u4e3b\u673a\u540d\u7684\u7f13\u51b2\u533a\u3002<\/li>\n<li>namelen&#xff1a;name\u7f13\u51b2\u533a\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<h3>4.3 \u7f16\u5199\u4ee3\u7801\u4f53\u9a8c\u7f51\u7edc\u7f16\u7a0b<\/h3>\n<p>\u4e0a\u9762\u4e86\u89e3\u4e86\u8fd9\u4e9b\u51fd\u6570&#xff0c;\u53ef\u80fd\u4e0d\u77e5\u9053\u5982\u4f55\u4f7f\u7528\u3002 \u8fd9\u91cc\u5c31\u5199\u4e00\u4e2a\u4f8b\u5b50&#xff0c;\u4ee5TCP\u5ba2\u6237\u7aef\u7684\u8eab\u4efd\u53bb\u8fde\u63a5TCP\u670d\u52a1\u5668&#xff0c;\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<p>**\u4e0b\u9762\u4ee3\u7801\u5b9e\u73b0\u4e00\u4e2aTCP\u5ba2\u6237\u7aef&#xff0c;\u8fde\u63a5\u5230\u6307\u5b9a\u7684\u670d\u52a1\u5668\u5e76\u5b8c\u6210\u901a\u4fe1\u3002 ** \u53ef\u4ee5\u76f4\u63a5\u5c06\u4ee3\u7801\u8d34\u5230\u4f60\u7684\u5de5\u7a0b\u91cc&#xff0c;\u8fd0\u884c&#xff0c;\u4f53\u9a8c\u6548\u679c\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;winsock2.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;ws2tcpip.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\"><span class=\"token function\">comment<\/span><span class=\"token punctuation\">(<\/span>lib<span class=\"token punctuation\">,<\/span> <\/span><span class=\"token string\">&#034;ws2_32.lib&#034;<\/span><span class=\"token expression\"><span class=\"token punctuation\">)<\/span> <\/span><span class=\"token comment\">\/\/\u544a\u8bc9\u7f16\u8bd1\u5668\u94fe\u63a5Winsock\u5e93<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    WSADATA wsaData<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521b\u5efa\u4e00\u4e2a\u7ed3\u6784\u4f53\u53d8\u91cf&#xff0c;\u7528\u4e8e\u5b58\u50a8\u5173\u4e8eWinsock\u5e93\u7684\u4fe1\u606f<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">WSAStartup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">MAKEWORD<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>wsaData<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521d\u59cb\u5316Winsock\u5e93&#xff0c;\u6307\u5b9a\u7248\u672c\u53f72.2&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;WSAStartup failed: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> result <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    SOCKET connectSocket <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> SOCK_STREAM<span class=\"token punctuation\">,<\/span> IPPROTO_TCP<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521b\u5efa\u4e00\u4e2aTCP\u5957\u63a5\u5b57&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>connectSocket <span class=\"token operator\">&#061;&#061;<\/span> INVALID_SOCKET<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;socket failed with error: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n        <span class=\"token function\">WSACleanup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6e05\u9664Winsock\u5e93<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    sockaddr_in service<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521b\u5efa\u4e00\u4e2a\u7ed3\u6784\u4f53\u53d8\u91cf&#xff0c;\u7528\u4e8e\u5b58\u50a8\u670d\u52a1\u5668\u5730\u5740\u4fe1\u606f<\/span><br \/>\n    service<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6307\u5b9a\u5730\u5740\u65cf\u4e3aIPv4<\/span><br \/>\n    <span class=\"token function\">inet_pton<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;127.0.0.1&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>service<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5c06\u5b57\u7b26\u4e32\u7c7b\u578b\u7684IP\u5730\u5740\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u7f51\u7edc\u5b57\u8282\u5e8f\u7684IP\u5730\u5740&#xff0c;\u5e76\u5b58\u50a8\u5728\u7ed3\u6784\u4f53\u4e2d<\/span><br \/>\n    service<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">12345<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5c06\u7aef\u53e3\u53f7\u4ece\u4e3b\u673a\u5b57\u8282\u5e8f\u8f6c\u6362\u4e3a\u7f51\u7edc\u5b57\u8282\u5e8f&#xff0c;\u5e76\u5b58\u50a8\u5728\u7ed3\u6784\u4f53\u4e2d<\/span><\/p>\n<p>    result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>SOCKADDR<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>service<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>service<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u5230\u670d\u52a1\u5668&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">&#061;&#061;<\/span> SOCKET_ERROR<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;connect failed with error: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n        <span class=\"token function\">closesocket<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5173\u95ed\u5957\u63a5\u5b57<\/span><br \/>\n        <span class=\"token function\">WSACleanup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6e05\u9664Winsock\u5e93<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Connected to server.&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f&#xff0c;\u8f93\u51fa\u6d88\u606f<\/span><\/p>\n<p>    <span class=\"token keyword\">char<\/span> sendBuffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Hello, server!&#034;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521b\u5efa\u53d1\u9001\u7f13\u51b2\u533a&#xff0c;\u5b58\u50a8\u5f85\u53d1\u9001\u7684\u6570\u636e<\/span><br \/>\n    result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">,<\/span> sendBuffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>sendBuffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5411\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">&#061;&#061;<\/span> SOCKET_ERROR<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;send failed with error: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n        <span class=\"token function\">closesocket<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5173\u95ed\u5957\u63a5\u5b57<\/span><br \/>\n        <span class=\"token function\">WSACleanup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6e05\u9664Winsock\u5e93<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">char<\/span> recvBuffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521b\u5efa\u63a5\u6536\u7f13\u51b2\u533a&#xff0c;\u7528\u4e8e\u5b58\u50a8\u4ece\u670d\u52a1\u5668\u63a5\u6536\u5230\u7684\u6570\u636e<\/span><br \/>\n    result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">,<\/span> recvBuffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>recvBuffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u4ece\u670d\u52a1\u5668\u63a5\u6536\u6570\u636e&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">&#061;&#061;<\/span> SOCKET_ERROR<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;recv failed with error: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n        <span class=\"token function\">closesocket<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5173\u95ed\u5957\u63a5\u5b57<\/span><br \/>\n        <span class=\"token function\">WSACleanup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6e05\u9664Winsock\u5e93<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Received message from server: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> recvBuffer <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u4ece\u670d\u52a1\u5668\u6536\u5230\u7684\u6570\u636e<\/span><\/p>\n<p>    <span class=\"token function\">closesocket<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5173\u95ed\u5957\u63a5\u5b57<\/span><br \/>\n    <span class=\"token function\">WSACleanup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6e05\u9664Winsock\u5e93<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd0\u884c\u6548\u679c&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171815-68028957ef7cb.png\" alt=\"image-20231031134243184\" \/><\/p>\n<h2>\u4e94\u3001\u8bbf\u95ee\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668\u521b\u5efa\u4e00\u4e2a\u4ea7\u54c1\u548c\u8bbe\u5907<\/h2>\n<h3>5.2 \u5f00\u901a\u7269\u8054\u7f51\u670d\u52a1<\/h3>\n<p>\u5730\u5740&#xff1a; https:\/\/www.huaweicloud.com\/product\/iothub.html<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171816-68028958a718e.png\" alt=\"image-20221204194233414\" \/><\/p>\n<p>\u73b0\u5728\u53ef\u4ee5\u514d\u8d39\u521b\u5efa\u7684&#xff0c;\u6309\u9700\u4ed8\u8d39\u3002 \u53ea\u8981\u662f\u4e0d\u8d85\u8fc7\u89c4\u683c&#xff0c;\u5c31\u53ef\u4ee5\u514d\u8d39\u4f7f\u7528&#xff0c;\u5bf9\u4e8e\u4e2a\u4eba\u9879\u76eeDemo\u6765\u8bf4&#xff0c;\u5b8c\u5168\u591f\u7528\u7684<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171817-6802895995a9e.png\" alt=\"image-20231128160932256\" \/><\/p>\n<p>\u70b9\u51fb\u7acb\u5373\u521b\u5efa\u4e4b\u540e&#xff0c;\u4f1a\u5f00\u59cb\u521b\u5efa\u5b9e\u4f8b&#xff0c;\u9700\u8981\u7b49\u5f85\u7247\u523b&#xff0c;\u518d\u5237\u65b0\u6d4f\u89c8\u5668\u5c31\u53ef\u4ee5\u770b\u5230\u521b\u5efa\u6210\u529f\u4e86\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171818-6802895a30d25.png\" alt=\"image-20231128161057219\" \/><\/p>\n<p>\u521b\u5efa\u5b8c\u6210&#xff0c;\u70b9\u51fb\u5b9e\u4f8b&#xff0c;\u5373\u53ef\u8fdb\u5165\u5b9e\u4f8b\u8be6\u60c5\u9875\u9762\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171818-6802895adcf52.png\" alt=\"image-20231128161544523\" \/><\/p>\n<p>\u8fdb\u5165\u5b9e\u4f8b\u8be6\u60c5\u9875\u9762\u540e&#xff0c;\u53ef\u4ee5\u770b\u5230\u63a5\u5165\u4fe1\u606f\u7684\u63cf\u8ff0&#xff0c;\u6211\u4eec\u5f53\u524d\u8bbe\u5907\u51c6\u5907\u91c7\u7528MQTT\u534f\u8bae\u63a5\u5165\u534e\u4e3a\u4e91\u5e73\u53f0&#xff0c;\u8fd9\u91cc\u53ef\u4ee5\u770b\u5230MQTT\u534f\u8bae\u7684\u5730\u5740\u548c\u7aef\u53e3\u53f7\u7b49\u4fe1\u606f\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171819-6802895b9594e.png\" alt=\"image-20231128161714301\" \/><\/p>\n<p>\u603b\u7ed3:<\/p>\n<p>\u7aef\u53e3\u53f7&#xff1a;   MQTT (1883)<br \/>\n\u63a5\u5165\u5730\u5740&#xff1a; 252d4bd608.st1.iotda-device.cn-north-4.myhuaweicloud.com<\/p>\n<p>**\u6839\u636e\u57df\u540d\u5730\u5740\u5f97\u5230IP\u5730\u5740\u4fe1\u606f: ** \u6253\u5f00windows\u7684CMD\u7a97\u53e3<\/p>\n<p>Microsoft Windows [\u7248\u672c 10.0.19045.3693]<br \/>\n(c) Microsoft Corporation\u3002\u4fdd\u7559\u6240\u6709\u6743\u5229\u3002<\/p>\n<p>C:\\\\Users\\\\11266&gt;ping 252d4bd608.st1.iotda-device.cn-north-4.myhuaweicloud.com<\/p>\n<p>\u6b63\u5728 Ping 252d4bd608.st1.iotda-device.cn-north-4.myhuaweicloud.com [117.78.5.125] \u5177\u6709 32 \u5b57\u8282\u7684\u6570\u636e:<br \/>\n\u6765\u81ea 117.78.5.125 \u7684\u56de\u590d: \u5b57\u8282&#061;32 \u65f6\u95f4&#061;41ms TTL&#061;94<br \/>\n\u6765\u81ea 117.78.5.125 \u7684\u56de\u590d: \u5b57\u8282&#061;32 \u65f6\u95f4&#061;38ms TTL&#061;94<br \/>\n\u6765\u81ea 117.78.5.125 \u7684\u56de\u590d: \u5b57\u8282&#061;32 \u65f6\u95f4&#061;37ms TTL&#061;94<br \/>\n\u6765\u81ea 117.78.5.125 \u7684\u56de\u590d: \u5b57\u8282&#061;32 \u65f6\u95f4&#061;39ms TTL&#061;94<\/p>\n<p>117.78.5.125 \u7684 Ping \u7edf\u8ba1\u4fe1\u606f:<br \/>\n    \u6570\u636e\u5305: \u5df2\u53d1\u9001 &#061; 4&#xff0c;\u5df2\u63a5\u6536 &#061; 4&#xff0c;\u4e22\u5931 &#061; 0 (0% \u4e22\u5931)&#xff0c;<br \/>\n\u5f80\u8fd4\u884c\u7a0b\u7684\u4f30\u8ba1\u65f6\u95f4(\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d):<br \/>\n    \u6700\u77ed &#061; 37ms&#xff0c;\u6700\u957f &#061; 41ms&#xff0c;\u5e73\u5747 &#061; 38ms<\/p>\n<p>C:\\\\Users\\\\11266&gt;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171820-6802895c379db.png\" alt=\"image-20231128161930198\" \/><\/p>\n<p>MQTT\u534f\u8bae\u63a5\u5165\u7aef\u53e3\u53f7\u6709\u4e24\u4e2a&#xff0c;1883\u662f\u975e\u52a0\u5bc6\u7aef\u53e3&#xff0c;8883\u662f\u8bc1\u4e66\u52a0\u5bc6\u7aef\u53e3&#xff0c;\u5355\u7247\u673a\u65e0\u6cd5\u52a0\u8f7d\u8bc1\u4e66&#xff0c;\u6240\u4ee5\u4f7f\u75281883\u7aef\u53e3\u6bd4\u8f83\u5408\u9002\u3002 \u63a5\u4e0b\u6765\u7684ESP8266\u5c31\u91c7\u75281883\u7aef\u53e3\u8fde\u63a5\u534e\u4e3a\u4e91\u7269\u8054\u7f51\u5e73\u53f0\u3002<\/p>\n<h3>5.3 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\/><\/p>\n<h4>&#xff08;3&#xff09;\u4ea7\u54c1\u521b\u5efa\u6210\u529f<\/h4>\n<p>\u521b\u5efa\u6210\u529f\u4e4b\u540e&#xff0c;\u70b9\u51fb\u4ea7\u54c1\u7684\u540d\u5b57\u5c31\u53ef\u4ee5\u8fdb\u5165\u5230\u4ea7\u54c1\u7684\u8be6\u60c5\u9875\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171821-6802895db3ccd.png\" alt=\"image-20231201143237590\" \/><\/p>\n<h4>&#xff08;4&#xff09;\u6dfb\u52a0\u81ea\u5b9a\u4e49\u6a21\u578b<\/h4>\n<p>\u4ea7\u54c1\u521b\u5efa\u5b8c\u6210\u4e4b\u540e&#xff0c;\u70b9\u51fb\u8fdb\u5165\u4ea7\u54c1\u8be6\u60c5\u9875\u9762&#xff0c;\u7ffb\u5230\u6700\u4e0b\u9762\u53ef\u4ee5\u770b\u5230\u6a21\u578b\u5b9a\u4e49\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171822-6802895e4d24b.png\" alt=\"image-20231128164716733\" \/><\/p>\n<p>\u6a21\u578b\u7b80\u5355\u6765\u8bf4&#xff1a; \u5c31\u662f\u5b58\u653e\u8bbe\u5907\u4e0a\u4f20\u5230\u4e91\u5e73\u53f0\u7684\u6570\u636e\u3002<\/p>\n<p>\u5148\u70b9\u51fb\u81ea\u5b9a\u4e49\u6a21\u578b\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171822-6802895ed757c.png\" alt=\"image-20231128164722543\" \/><\/p>\n<p>\u518d\u521b\u5efa\u4e00\u4e2a\u670d\u52a1ID\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171823-6802895f6dfa4.png\" alt=\"image-20231128164736524\" \/><\/p>\n<p>\u63a5\u7740\u70b9\u51fb\u65b0\u589e\u5c5e\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19iom04sjjams.png\" alt=\"image-20231128164752998\" \/><\/p>\n<p>\u8fd9\u91cc\u5c31\u521b\u5efa\u4e00\u4e2a\u6e29\u5ea6\u7684\u5c5e\u6027\u3002\u6211\u4eec\u8fd9\u4e2a\u8bbe\u5907\u7528\u6765\u6d4b\u6e29\u7684\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19yhofabdsogm.png\" alt=\"image-20231201143611800\" \/><\/p>\n<p><img decoding=\"async\" src=\"2025-04-194kdk5nw0v5p.png\" alt=\"image-20231201143658599\" \/><\/p>\n<h3>3.4 \u6dfb\u52a0\u8bbe\u5907<\/h3>\n<p>\u4ea7\u54c1\u662f\u5c5e\u4e8e\u4e0a\u5c42\u7684\u62bd\u8c61\u6a21\u578b&#xff0c;\u63a5\u4e0b\u6765\u5728\u4ea7\u54c1\u6a21\u578b\u4e0b\u6dfb\u52a0\u5b9e\u9645\u7684\u8bbe\u5907\u3002\u6dfb\u52a0\u7684\u8bbe\u5907\u6700\u7ec8\u9700\u8981\u4e0e\u771f\u5b9e\u7684\u8bbe\u5907\u5173\u8054\u5728\u4e00\u8d77&#xff0c;\u5b8c\u6210\u6570\u636e\u4ea4\u4e92\u3002<\/p>\n<h4>&#xff08;1&#xff09;\u6ce8\u518c\u8bbe\u5907<\/h4>\n<p><img decoding=\"async\" src=\"2025-04-19wv4u5dlpypp.png\" alt=\"image-20231128165130340\" \/><\/p>\n<h4>&#xff08;2&#xff09;\u6839\u636e\u81ea\u5df1\u7684\u8bbe\u5907\u586b\u5199<\/h4>\n<p><img decoding=\"async\" src=\"2025-04-19xb023b5sost.png\" alt=\"image-20231201143815785\" \/><\/p>\n<h4>&#xff08;3&#xff09;\u4fdd\u5b58\u8bbe\u5907\u4fe1\u606f<\/h4>\n<p>\u521b\u5efa\u5b8c\u6bd5\u4e4b\u540e&#xff0c;\u70b9\u51fb\u4fdd\u5b58\u5e76\u5173\u95ed&#xff0c;\u5f97\u5230\u521b\u5efa\u7684\u8bbe\u5907\u5bc6\u5319\u4fe1\u606f\u3002\u8be5\u4fe1\u606f\u5728\u540e\u7eed\u751f\u6210MQTT\u4e09\u5143\u7ec4\u7684\u65f6\u5019\u9700\u8981\u4f7f\u7528\u3002<\/p>\n<p><span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token string\">&#034;device_id&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;65697df3585c81787ad4da82_stm32&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string\">&#034;secret&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;12345678&#034;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u70b9\u51fb\u8bbe\u5907\u540d\u79f0\u53ef\u4ee5\u8fdb\u5165\u5230\u8bbe\u5907\u8be6\u60c5\u9875\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19alflemqzcxz.png\" alt=\"image-20231201143934356\" \/><\/p>\n<h3>3.5 MQTT\u534f\u8bae\u4e3b\u9898\u8ba2\u9605\u4e0e\u53d1\u5e03<\/h3>\n<h4>&#xff08;1&#xff09;\u534e\u4e3a\u4e91\u5e73\u53f0MQTT\u534f\u8bae\u4f7f\u7528\u9650\u5236<\/h4>\n<table>\n<tr>\u63cf\u8ff0\u9650\u5236<\/tr>\n<tbody>\n<tr>\n<td>\u652f\u6301\u7684MQTT\u534f\u8bae\u7248\u672c<\/td>\n<td>3.1.1<\/td>\n<\/tr>\n<tr>\n<td>\u4e0e\u6807\u51c6MQTT\u534f\u8bae\u7684\u533a\u522b<\/td>\n<td>\u652f\u6301Qos 0\u548cQos 1\u652f\u6301Topic\u81ea\u5b9a\u4e49\u4e0d\u652f\u6301QoS2\u4e0d\u652f\u6301will\u3001retain msg<\/td>\n<\/tr>\n<tr>\n<td>MQTTS\u652f\u6301\u7684\u5b89\u5168\u7b49\u7ea7<\/td>\n<td>\u91c7\u7528TCP\u901a\u9053\u57fa\u7840 &#043; TLS\u534f\u8bae&#xff08;\u6700\u9ad8TLSv1.3\u7248\u672c&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u5355\u5e10\u53f7\u6bcf\u79d2\u6700\u5927MQTT\u8fde\u63a5\u8bf7\u6c42\u6570<\/td>\n<td>\u65e0\u9650\u5236<\/td>\n<\/tr>\n<tr>\n<td>\u5355\u4e2a\u8bbe\u5907\u6bcf\u5206\u949f\u652f\u6301\u7684\u6700\u5927MQTT\u8fde\u63a5\u6570<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>\u5355\u4e2aMQTT\u8fde\u63a5\u6bcf\u79d2\u7684\u541e\u5410\u91cf&#xff0c;\u5373\u5e26\u5bbd&#xff0c;\u5305\u542b\u76f4\u8fde\u8bbe\u5907\u548c\u7f51\u5173<\/td>\n<td>3KB\/s<\/td>\n<\/tr>\n<tr>\n<td>MQTT\u5355\u4e2a\u53d1\u5e03\u6d88\u606f\u6700\u5927\u957f\u5ea6&#xff0c;\u8d85\u8fc7\u6b64\u5927\u5c0f\u7684\u53d1\u5e03\u8bf7\u6c42\u5c06\u88ab\u76f4\u63a5\u62d2\u7edd<\/td>\n<td>1MB<\/td>\n<\/tr>\n<tr>\n<td>MQTT\u8fde\u63a5\u5fc3\u8df3\u65f6\u95f4\u5efa\u8bae\u503c<\/td>\n<td>\u5fc3\u8df3\u65f6\u95f4\u9650\u5b9a\u4e3a30\u81f31200\u79d2&#xff0c;\u63a8\u8350\u8bbe\u7f6e\u4e3a120\u79d2<\/td>\n<\/tr>\n<tr>\n<td>\u4ea7\u54c1\u662f\u5426\u652f\u6301\u81ea\u5b9a\u4e49Topic<\/td>\n<td>\u652f\u6301<\/td>\n<\/tr>\n<tr>\n<td>\u6d88\u606f\u53d1\u5e03\u4e0e\u8ba2\u9605<\/td>\n<td>\u8bbe\u5907\u53ea\u80fd\u5bf9\u81ea\u5df1\u7684Topic\u8fdb\u884c\u6d88\u606f\u53d1\u5e03\u4e0e\u8ba2\u9605<\/td>\n<\/tr>\n<tr>\n<td>\u6bcf\u4e2a\u8ba2\u9605\u8bf7\u6c42\u7684\u6700\u5927\u8ba2\u9605\u6570<\/td>\n<td>\u65e0\u9650\u5236<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>&#xff08;2&#xff09;\u4e3b\u9898\u8ba2\u9605\u683c\u5f0f<\/h4>\n<p>\u5e2e\u52a9\u6587\u6863\u5730\u5740&#xff1a;https:\/\/support.huaweicloud.com\/devg-iothub\/iot_02_2200.html<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19htf2yk4pml4.png\" alt=\"image-20221207153310037\" \/><\/p>\n<p>\u5bf9\u4e8e\u8bbe\u5907\u800c\u8a00&#xff0c;\u4e00\u822c\u4f1a\u8ba2\u9605\u5e73\u53f0\u4e0b\u53d1\u6d88\u606f\u7ed9\u8bbe\u5907 \u8fd9\u4e2a\u4e3b\u9898\u3002<\/p>\n<p>\u8bbe\u5907\u60f3\u63a5\u6536\u5e73\u53f0\u4e0b\u53d1\u7684\u6d88\u606f&#xff0c;\u5c31\u9700\u8981\u8ba2\u9605\u5e73\u53f0\u4e0b\u53d1\u6d88\u606f\u7ed9\u8bbe\u5907 \u7684\u4e3b\u9898&#xff0c;\u8ba2\u9605\u540e&#xff0c;\u5e73\u53f0\u4e0b\u53d1\u6d88\u606f\u7ed9\u8bbe\u5907&#xff0c;\u8bbe\u5907\u5c31\u4f1a\u6536\u5230\u6d88\u606f\u3002<\/p>\n<p>\u5982\u679c\u8bbe\u5907\u60f3\u8981\u77e5\u9053\u5e73\u53f0\u4e0b\u53d1\u7684\u6d88\u606f&#xff0c;\u9700\u8981\u8ba2\u9605\u4e0a\u9762\u56fe\u7247\u91cc\u6807\u6ce8\u7684\u4e3b\u9898\u3002<\/p>\n<p>\u4ee5\u5f53\u524d\u8bbe\u5907\u4e3a\u4f8b&#xff0c;\u6700\u7ec8\u8ba2\u9605\u4e3b\u9898\u7684\u683c\u5f0f\u5982\u4e0b:<br \/>\n$oc\/devices\/{device_id}\/sys\/messages\/down<\/p>\n<p>\u6700\u7ec8\u7684\u683c\u5f0f:<br \/>\n$oc\/devices\/65697df3585c81787ad4da82_stm32\/sys\/messages\/down<\/p>\n<p>\u200b<\/p>\n<h4>&#xff08;3&#xff09;\u4e3b\u9898\u53d1\u5e03\u683c\u5f0f<\/h4>\n<p>\u5bf9\u4e8e\u8bbe\u5907\u6765\u8bf4&#xff0c;\u4e3b\u9898\u53d1\u5e03\u8868\u793a\u5411\u4e91\u5e73\u53f0\u4e0a\u4f20\u6570\u636e&#xff0c;\u5c06\u6700\u65b0\u7684\u4f20\u611f\u5668\u6570\u636e&#xff0c;\u8bbe\u5907\u72b6\u6001\u4e0a\u4f20\u5230\u4e91\u5e73\u53f0\u3002<\/p>\n<p>\u8fd9\u4e2a\u64cd\u4f5c\u79f0\u4e3a&#xff1a;\u5c5e\u6027\u4e0a\u62a5\u3002<\/p>\n<p>\u5e2e\u52a9\u6587\u6863\u5730\u5740&#xff1a;https:\/\/support.huaweicloud.com\/usermanual-iothub\/iot_06_v5_3010.html<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19t0zolozvmhd.png\" alt=\"image-20221207153637391\" \/><\/p>\n<p>\u6839\u636e\u5e2e\u52a9\u6587\u6863\u7684\u4ecb\u7ecd&#xff0c; \u5f53\u524d\u8bbe\u5907\u53d1\u5e03\u4e3b\u9898&#xff0c;\u4e0a\u62a5\u5c5e\u6027\u7684\u683c\u5f0f\u603b\u7ed3\u5982\u4e0b&#xff1a;<\/p>\n<p>\u53d1\u5e03\u7684\u4e3b\u9898\u683c\u5f0f:<br \/>\n$oc\/devices\/{device_id}\/sys\/properties\/report<\/p>\n<p>\u6700\u7ec8\u7684\u683c\u5f0f:<br \/>\n$oc\/devices\/65697df3585c81787ad4da82_stm32\/sys\/properties\/report<br \/>\n\u53d1\u5e03\u4e3b\u9898\u65f6&#xff0c;\u9700\u8981\u4e0a\u4f20\u6570\u636e&#xff0c;\u8fd9\u4e2a\u6570\u636e\u683c\u5f0f\u662fJSON\u683c\u5f0f\u3002<\/p>\n<p>\u4e0a\u4f20\u7684JSON\u6570\u636e\u683c\u5f0f\u5982\u4e0b:<\/p>\n<p>{<br \/>\n  &#034;services&#034;: [<br \/>\n    {<br \/>\n      &#034;service_id&#034;: &lt;\u586b\u670d\u52a1ID&gt;,<br \/>\n      &#034;properties&#034;: {<br \/>\n        &#034;&lt;\u586b\u5c5e\u6027\u540d\u79f01&gt;&#034;: &lt;\u586b\u5c5e\u6027\u503c&gt;,<br \/>\n        &#034;&lt;\u586b\u5c5e\u6027\u540d\u79f02&gt;&#034;: &lt;\u586b\u5c5e\u6027\u503c&gt;,<br \/>\n        &#8230;&#8230;&#8230;.<br \/>\n      }<br \/>\n    }<br \/>\n  ]<br \/>\n}<br \/>\n\u6839\u636eJSON\u683c\u5f0f&#xff0c;\u4e00\u6b21\u53ef\u4ee5\u4e0a\u4f20\u591a\u4e2a\u5c5e\u6027\u5b57\u6bb5\u3002 \u8fd9\u4e2aJSON\u683c\u5f0f\u91cc\u7684&#xff0c;\u670d\u52a1ID&#xff0c;\u5c5e\u6027\u5b57\u6bb5\u540d\u79f0&#xff0c;\u5c5e\u6027\u503c\u7c7b\u578b&#xff0c;\u5728\u524d\u9762\u521b\u5efa\u4ea7\u54c1\u7684\u65f6\u5019\u5c31\u5df2\u7ecf\u4ecb\u7ecd\u4e86&#xff0c;\u4e0d\u8bb0\u5f97\u53ef\u4ee5\u7ffb\u5230\u524d\u9762\u53bb\u67e5\u770b\u3002<\/p>\n<p>\u6839\u636e\u8fd9\u4e2a\u683c\u5f0f&#xff0c;\u7ec4\u5408\u4e00\u6b21\u4e0a\u4f20\u7684\u5c5e\u6027\u6570\u636e:<br \/>\n{&#034;services&#034;: [{&#034;service_id&#034;: &#034;stm32&#034;,&#034;properties&#034;:{&#034;TEMP&#034;:36.2}}]}<\/p>\n<h3>3.6 MQTT\u4e09\u5143\u7ec4<\/h3>\n<p>MQTT\u534f\u8bae\u767b\u5f55\u9700\u8981\u586b\u7528\u6237ID&#xff0c;\u8bbe\u5907ID&#xff0c;\u8bbe\u5907\u5bc6\u7801\u7b49\u4fe1\u606f&#xff0c;\u5c31\u50cf\u6211\u4eec\u5e73\u65f6\u767b\u5f55QQ&#xff0c;\u5fae\u4fe1\u4e00\u6837\u8981\u8f93\u5165\u8d26\u53f7\u5bc6\u7801\u624d\u80fd\u767b\u5f55\u3002MQTT\u534f\u8bae\u767b\u5f55\u7684\u8fd93\u4e2a\u53c2\u6570&#xff0c;\u4e00\u822c\u79f0\u4e3aMQTT\u4e09\u5143\u7ec4\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\u4ecb\u7ecd&#xff0c;\u534e\u4e3a\u4e91\u5e73\u53f0\u7684MQTT\u4e09\u5143\u7ec4\u53c2\u6570\u5982\u4f55\u5f97\u5230\u3002<\/p>\n<h4>&#xff08;1&#xff09;MQTT\u670d\u52a1\u5668\u5730\u5740<\/h4>\n<p>\u8981\u767b\u5f55MQTT\u670d\u52a1\u5668&#xff0c;\u9996\u5148\u8bb0\u5f97\u5148\u77e5\u9053\u670d\u52a1\u5668\u7684\u5730\u5740\u662f\u591a\u5c11&#xff0c;\u7aef\u53e3\u662f\u591a\u5c11\u3002<\/p>\n<p>\u5e2e\u52a9\u6587\u6863\u5730\u5740&#xff1a;https:\/\/console.huaweicloud.com\/iotdm\/?region&#061;cn-north-4#\/dm-portal\/home<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19pla20fhzjle.png\" alt=\"image-20231128165826027\" \/><\/p>\n<p>MQTT\u534f\u8bae\u7684\u7aef\u53e3\u652f\u63011883\u548c8883&#xff0c;\u5b83\u4eec\u7684\u533a\u522b\u662f&#xff1a;8883 \u662f\u52a0\u5bc6\u7aef\u53e3\u66f4\u52a0\u5b89\u5168\u3002\u4f46\u662f\u5355\u7247\u673a\u4e0a\u4f7f\u7528\u6bd4\u8f83\u56f0\u96be&#xff0c;\u6240\u4ee5\u5f53\u524d\u7684\u8bbe\u5907\u662f\u91c7\u75281883\u7aef\u53e3\u8fdb\u8fde\u63a5\u7684\u3002<\/p>\n<p>\u6839\u636e\u4e0a\u9762\u7684\u57df\u540d\u548c\u7aef\u53e3\u53f7&#xff0c;\u5f97\u5230\u4e0b\u9762\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u4fe1\u606f&#xff1a; \u5982\u679c\u8bbe\u5907\u652f\u6301\u586b\u5199\u57df\u540d\u53ef\u4ee5\u76f4\u63a5\u586b\u57df\u540d&#xff0c;\u4e0d\u652f\u6301\u5c31\u76f4\u63a5\u586b\u5199IP\u5730\u5740\u3002 &#xff08;IP\u5730\u5740\u5c31\u662f\u57df\u540d\u89e3\u6790\u5f97\u5230\u7684&#xff09;<\/p>\n<p>\u534e\u4e3a\u4e91\u7684MQTT\u670d\u52a1\u5668\u5730\u5740&#xff1a;117.78.5.125<br \/>\n\u534e\u4e3a\u4e91\u7684MQTT\u7aef\u53e3\u53f7&#xff1a;1883<\/p>\n<h4>&#xff08;2&#xff09;\u751f\u6210MQTT\u4e09\u5143\u7ec4<\/h4>\n<p>\u534e\u4e3a\u4e91\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5728\u7ebf\u5de5\u5177&#xff0c;\u7528\u6765\u751f\u6210MQTT\u9274\u6743\u4e09\u5143\u7ec4&#xff1a; https:\/\/iot-tool.obs-website.cn-north-4.myhuaweicloud.com\/<\/p>\n<p>\u6253\u5f00\u8fd9\u4e2a\u5de5\u5177&#xff0c;\u586b\u5165\u8bbe\u5907\u7684\u4fe1\u606f&#xff08;\u4e5f\u5c31\u662f\u521a\u624d\u521b\u5efa\u5b8c\u8bbe\u5907\u4e4b\u540e\u4fdd\u5b58\u7684\u4fe1\u606f&#xff09;&#xff0c;\u70b9\u51fb\u751f\u6210&#xff0c;\u5c31\u53ef\u4ee5\u5f97\u5230MQTT\u7684\u767b\u5f55\u4fe1\u606f\u4e86\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u6253\u5f00\u7684\u9875\u9762&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19i4vrxazfzbo.png\" alt=\"image-20221207154917230\" \/><\/p>\n<p>\u586b\u5165\u8bbe\u5907\u7684\u4fe1\u606f&#xff1a; &#xff08;\u4e0a\u9762\u4e24\u884c\u5c31\u662f\u8bbe\u5907\u521b\u5efa\u5b8c\u6210\u4e4b\u540e\u4fdd\u5b58\u5f97\u5230\u7684&#xff09;<\/p>\n<p>\u76f4\u63a5\u5f97\u5230\u4e09\u5143\u7ec4\u4fe1\u606f\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19mutdmnrarz5.png\" alt=\"image-20231201144219530\" \/><\/p>\n<p>\u5f97\u5230\u4e09\u5143\u7ec4\u4e4b\u540e&#xff0c;\u8bbe\u5907\u7aef\u901a\u8fc7MQTT\u534f\u8bae\u767b\u5f55\u9274\u6743\u7684\u65f6\u5019&#xff0c;\u586b\u5165\u53c2\u6570\u5373\u53ef\u3002<\/p>\n<p>ClientId  <span class=\"token number\">65697<\/span>df3585c81787ad4da82_stm32_0_0_2023120106<br \/>\nUsername  <span class=\"token number\">65697<\/span>df3585c81787ad4da82_stm32<br \/>\nPassword  <span class=\"token number\">12<\/span>cc9b1f637da8d755fa2cbd007bb669e6f292e3e63017538b5e6e13eef0cf58<\/p>\n<p>\u5230\u6b64&#xff0c;\u4e91\u5e73\u53f0\u7684\u90e8\u7f72\u5df2\u7ecf\u5b8c\u6210&#xff0c;\u8bbe\u5907\u5df2\u7ecf\u53ef\u4ee5\u6b63\u5e38\u4e0a\u4f20\u6570\u636e\u4e86\u3002<\/p>\n<h4>&#xff08;3&#xff09;MQTT\u767b\u5f55\u6d4b\u8bd5\u53c2\u6570\u603b\u7ed3<\/h4>\n<p>IP\u5730\u5740&#xff1a;<span class=\"token number\">117.78<\/span><span class=\"token punctuation\">.<\/span><span class=\"token number\">5.125<\/span><br \/>\n\u7aef\u53e3\u53f7&#xff1a;<span class=\"token number\">1883<\/span><\/p>\n<p>ClientId  <span class=\"token number\">65697<\/span>df3585c81787ad4da82_stm32_0_0_2023120106<br \/>\nUsername  <span class=\"token number\">65697<\/span>df3585c81787ad4da82_stm32<br \/>\nPassword  <span class=\"token number\">12<\/span>cc9b1f637da8d755fa2cbd007bb669e6f292e3e63017538b5e6e13eef0cf58<\/p>\n<p>\u8ba2\u9605\u4e3b\u9898&#xff1a;$oc<span class=\"token operator\">\/<\/span>devices<span class=\"token operator\">\/<\/span><span class=\"token number\">65697<\/span>df3585c81787ad4da82_stm32<span class=\"token operator\">\/<\/span>sys<span class=\"token operator\">\/<\/span>messages<span class=\"token operator\">\/<\/span>down<\/p>\n<p>\u53d1\u5e03\u4e3b\u9898&#xff1a;$oc<span class=\"token operator\">\/<\/span>devices<span class=\"token operator\">\/<\/span><span class=\"token number\">65697<\/span>df3585c81787ad4da82_stm32<span class=\"token operator\">\/<\/span>sys<span class=\"token operator\">\/<\/span>properties<span class=\"token operator\">\/<\/span>report<br \/>\n\u53d1\u5e03\u6570\u636e&#xff1a;<span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;services&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;service_id&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;stm32&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;properties&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;TEMP&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">36.2<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u516d\u3001\u5f00\u59cb\u5b66\u4e60MQTT\u534f\u8bae<\/h2>\n<h3>6.1 \u5148\u4e86\u89e3\u4e0bMQTT\u534f\u8bae<\/h3>\n<p>MQTT&#xff08;Message Queuing Telemetry Transport&#xff0c;\u6d88\u606f\u961f\u5217\u9065\u6d4b\u4f20\u8f93\u534f\u8bae&#xff09;&#xff0c;\u662f\u4e00\u79cd\u57fa\u4e8e\u53d1\u5e03\/\u8ba2\u9605\u6a21\u5f0f\u7684\u201c\u8f7b\u91cf\u7ea7\u201d\u7684\u6d88\u606f\u534f\u8bae&#xff0c;\u53ef\u5728\u53d1\u5e03\u8005\u548c\u8ba2\u9605\u8005\u4e4b\u95f4\u4f20\u9012\u6d88\u606f\u3002MQTT\u534f\u8bae\u6784\u5efa\u4e8eTCP\/IP\u534f\u8bae\u4e0a&#xff0c;\u7531IBM\u57281999\u5e74\u53d1\u5e03&#xff0c;\u5f53\u524d\u5df2\u7ecf\u6210\u4e3a\u4e86\u4e00\u79cd\u4e3b\u6d41\u7684\u7269\u8054\u7f51\u901a\u4fe1\u534f\u8bae\u3002<\/p>\n<p>MQTT\u6700\u5927\u7684\u4f18\u70b9\u5728\u4e8e&#xff0c;\u80fd\u591f\u4ee5\u6781\u5c11\u7684\u4ee3\u7801\u548c\u6709\u9650\u7684\u5e26\u5bbd&#xff0c;\u4e3a\u8fde\u63a5\u8fdc\u7a0b\u8bbe\u5907\u63d0\u4f9b\u5b9e\u65f6\u53ef\u9760\u7684\u6d88\u606f\u670d\u52a1\u3002\u5b83\u662f\u4e00\u79cd\u4f4e\u5f00\u9500\u3001\u4f4e\u5e26\u5bbd\u5360\u7528\u7684\u5373\u65f6\u901a\u8baf\u534f\u8bae&#xff0c;\u4f7f\u5176\u5728\u7269\u8054\u7f51\u3001\u5c0f\u578b\u8bbe\u5907\u3001\u79fb\u52a8\u5e94\u7528\u7b49\u65b9\u9762\u6709\u8f83\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u7531\u4e8e\u5176\u5c0f\u5de7\u3001\u9ad8\u6548\u548c\u53ef\u9760\u7684\u7279\u70b9&#xff0c;MQTT\u5728\u7269\u8054\u7f51\u9886\u57df\u5f97\u5230\u4e86\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u5728\u5f88\u591a\u60c5\u51b5\u4e0b&#xff0c;\u5305\u62ec\u53d7\u9650\u7684\u73af\u5883\u4e2d&#xff0c;\u5982&#xff1a;\u673a\u5668\u4e0e\u673a\u5668&#xff08;M2M&#xff09;\u901a\u4fe1\u548c\u7269\u8054\u7f51&#xff08;IoT&#xff09;&#xff0c;\u4e14\u5df2\u7ecf\u5e7f\u6cdb\u5e94\u7528\u4e8e\u901a\u8fc7\u536b\u661f\u94fe\u8def\u901a\u4fe1\u4f20\u611f\u5668\u3001\u5076\u5c14\u62e8\u53f7\u7684\u533b\u7597\u8bbe\u5907\u3001\u667a\u80fd\u5bb6\u5c45\u3001\u53ca\u4e00\u4e9b\u5c0f\u578b\u5316\u8bbe\u5907\u4e2d\u3002<\/p>\n<p>MQTT\u534f\u8bae\u7684\u5de5\u4f5c\u539f\u7406\u662f\u57fa\u4e8e\u53d1\u5e03\/\u8ba2\u9605\u6a21\u5f0f\u3002\u5728\u8fd9\u79cd\u6a21\u5f0f\u4e0b&#xff0c;\u53d1\u5e03\u8005\u53ef\u4ee5\u5411\u4e00\u4e2a\u6216\u591a\u4e2a\u4e3b\u9898\u53d1\u5e03\u6d88\u606f&#xff0c;\u800c\u8ba2\u9605\u8005\u53ef\u4ee5\u8ba2\u9605\u8fd9\u4e9b\u4e3b\u9898\u4ee5\u63a5\u6536\u76f8\u5173\u6d88\u606f\u3002\u8fd9\u79cd\u6a21\u5f0f\u5141\u8bb8\u591a\u4e2a\u53d1\u5e03\u8005\u548c\u8ba2\u9605\u8005\u540c\u65f6\u5b58\u5728&#xff0c;\u5b9e\u73b0\u4e86\u4e00\u79cd\u7075\u6d3b\u7684\u6d88\u606f\u4f20\u9012\u673a\u5236\u3002\u6b64\u5916&#xff0c;MQTT\u534f\u8bae\u8fd8\u652f\u6301\u4e09\u79cd\u6d88\u606f\u4f20\u9012\u8d28\u91cf\u7b49\u7ea7&#xff0c;\u53ef\u6839\u636e\u9700\u8981\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n<p>MQTT\u534f\u8bae\u7684\u53e6\u4e00\u4e2a\u91cd\u8981\u7279\u70b9\u662f\u5176\u8f7b\u91cf\u7ea7\u548c\u7b80\u5355\u7684\u8bbe\u8ba1\u3002\u5b83\u7684\u6d88\u606f\u5934\u975e\u5e38\u5c0f&#xff0c;\u53ea\u67092\u4e2a\u5b57\u8282&#xff0c;\u8fd9\u610f\u5473\u7740\u5728\u7f51\u7edc\u5e26\u5bbd\u6709\u9650\u7684\u73af\u5883\u4e0b\u4e5f\u80fd\u591f\u5b9e\u73b0\u9ad8\u6548\u7684\u6d88\u606f\u4f20\u9012\u3002\u6b64\u5916&#xff0c;MQTT\u534f\u8bae\u8fd8\u652f\u6301\u6301\u4e45\u5316\u8fde\u63a5\u548c\u6d88\u606f\u961f\u5217\u7b49\u9ad8\u7ea7\u529f\u80fd&#xff0c;\u53ef\u8fdb\u4e00\u6b65\u63d0\u9ad8\u6d88\u606f\u7684\u53ef\u9760\u6027\u548c\u4f20\u9012\u6548\u7387\u3002<\/p>\n<p>MQTT\u534f\u8bae\u7684\u5e94\u7528\u8303\u56f4\u975e\u5e38\u5e7f\u6cdb\u3002\u4f8b\u5982&#xff0c;\u5728\u667a\u80fd\u5bb6\u5c45\u9886\u57df&#xff0c;\u53ef\u4ee5\u4f7f\u7528MQTT\u534f\u8bae\u5c06\u5404\u79cd\u667a\u80fd\u8bbe\u5907\u8fde\u63a5\u5728\u4e00\u8d77&#xff0c;\u5b9e\u73b0\u8bbe\u5907\u7684\u8fdc\u7a0b\u63a7\u5236\u548c\u76d1\u6d4b\u3002\u5728\u5de5\u4e1a\u9886\u57df&#xff0c;MQTT\u534f\u8bae\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u8bbe\u5907\u7684\u8fdc\u7a0b\u76d1\u63a7\u548c\u7ef4\u62a4&#xff0c;\u63d0\u9ad8\u751f\u4ea7\u6548\u7387\u548c\u4ea7\u54c1\u8d28\u91cf\u3002\u5728\u667a\u6167\u57ce\u5e02\u5efa\u8bbe\u4e2d&#xff0c;MQTT\u534f\u8bae\u53ef\u4ee5\u7528\u4e8e\u4ea4\u901a\u7ba1\u7406\u3001\u73af\u5883\u76d1\u6d4b\u548c\u516c\u5171\u5b89\u5168\u7b49\u65b9\u9762&#xff0c;\u63d0\u5347\u57ce\u5e02\u7ba1\u7406\u548c\u5c45\u6c11\u751f\u6d3b\u7684\u8d28\u91cf\u3002<\/p>\n<h3>6.2 MQTT\u534f\u8bae\u5b98\u7f51\u4ecb\u7ecd<\/h3>\n<p>\u76ee\u524dMQTT\u534f\u8bae\u4e3b\u8981\u662f3.1.1 \u548c 5.0 \u4e24\u4e2a\u7248\u672c\u3002 \u672c\u7bc7\u6587\u7ae0\u662f\u4ecb\u7ecd3.1.1\u7248\u672c\u7684MQTT\u534f\u8bae\u3002 \u5404\u5927\u6807\u51c6\u7684MQTT\u670d\u52a1\u5668\u90fd\u652f\u63013.1.1.<\/p>\n<p>\u94fe\u63a5&#xff1a;https:\/\/docs.oasis-open.org\/mqtt\/mqtt\/v3.1.1\/os\/mqtt-v3.1.1-os.html<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19uksy2wknkpa.png\" alt=\"image-20231130173124909\" \/><\/p>\n<p>\u5728\u6587\u6863\u7684\u4e0b\u65b9\u5c31\u662f\u4ecb\u7ecdMQTT\u534f\u8bae\u7684\u6bcf\u4e2a\u5305\u5982\u4f55\u5c01\u88c5\u7684\u3002\u7167\u7740\u534f\u8bae\u5199\u4ee3\u7801\u5c31\u884c\u4e86\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19skuuztfcj3l.png\" alt=\"image-20231130173137530\" \/><\/p>\n<h3>6.3 \u9700\u8981\u5b9e\u73b0\u76843\u4e2a\u51fd\u6570<\/h3>\n<p>\u6574\u4e2aMQTT\u534f\u8bae\u91cc&#xff0c;\u4e3b\u8981\u662f\u5b9e\u73b03\u4e2a\u51fd\u6570\u5c31\u884c\u4e86&#xff08;\u5176\u4ed6\u7684\u63a5\u53e3\u770b\u81ea\u5df1\u9700\u6c42&#xff09;\u3002<\/p>\n<p>\u4e0b\u9762\u5217\u51fa\u76843\u4e2a\u51fd\u6570&#xff0c;\u5728\u4e00\u822c\u7684MQTT\u901a\u4fe1\u91cc\u662f\u5fc5\u5907\u7684\u3002\u6211\u4eec\u53ea\u8981\u5b9e\u73b0\u4e86\u8fd93\u4e2a\u51fd\u6570&#xff0c;\u90a3\u4e48\u5b8c\u6210\u57fa\u672c\u7684MQTT\u901a\u4fe1\u5c31\u6ca1\u6709\u95ee\u9898\u4e86\u3002<\/p>\n<p><span class=\"token comment\">\/\/\u53d1\u5e03\u4e3b\u9898<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_PublishData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> topic<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> message<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> qos<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u8ba2\u9605\u6216\u8005\u53d6\u6d88\u8ba2\u9605\u4e3b\u9898<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_SubscribeTopic<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> topic<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> qos<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> whether<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u767b\u5f55MQTT\u670d\u52a1\u5668<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_Connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> ClientID<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> Username<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> Password<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h3>6.4 \u67e5\u770b\u534f\u8bae\u6587\u6863&#xff0c;\u4e86\u89e3\u5982\u4f55\u7ec4\u5408\u534f\u8bae\u62a5\u6587<\/h3>\n<p>\u30101\u3011\u6253\u5f00\u6587\u6863&#xff0c;\u6253\u5f00\u76ee\u5f55&#xff0c;\u7ffb\u5230\u7b2c3\u7ae0\u8282\u2014MQTT\u63a7\u5236\u62a5\u6587\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-190534jz3sybk.png\" alt=\"image-20231201150505249\" \/><\/p>\n<p>\u30102\u3011\u5728\u7b2c3\u7ae0&#xff0c;\u63a7\u5236\u62a5\u6587\u91cc&#xff0c;\u627e\u5230\u5bf9\u5e94\u7684\u5b50\u7ae0\u8282&#xff0c;\u4e5f\u5c31\u662f\u6211\u4eec\u63a5\u7ebf\u9700\u8981\u7167\u7740\u6587\u6863\u5b9e\u73b0\u534f\u8bae\u7ec4\u5305\u7684\u7ae0\u8282\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19smqdvld115x.png\" alt=\"image-20231201150657961\" \/><\/p>\n<h3>6.5 \u5b9e\u73b0MQTT_Connect\u51fd\u6570<\/h3>\n<p>\u5148\u8ba4\u771f\u9605\u8bfb\u6587\u6863&#xff1a; \u4e86\u89e3\u8fd9\u4e2a\u62a5\u6587\u7684\u89c4\u5219&#xff0c;\u4ee5\u53ca\u51fa\u73b0\u9519\u8bef\u4e4b\u540e\u9519\u8bef\u4ee3\u7801\u7684\u542b\u4e49\u3002<\/p>\n<p>\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u7684\u7f51\u7edc\u8fde\u63a5\u5efa\u7acb\u540e&#xff0c;\u5ba2\u6237\u7aef\u53d1\u9001\u7ed9\u670d\u52a1\u7aef\u7684\u7b2c\u4e00\u4e2a\u62a5\u6587\u5fc5\u987b\u662f CONNECT \u62a5\u6587\u3002 \u5728\u4e00\u4e2a\u7f51\u7edc\u8fde\u63a5\u4e0a&#xff0c;\u5ba2\u6237\u7aef\u53ea\u80fd\u53d1\u9001\u4e00\u6b21CONNECT \u62a5\u6587\u3002\u670d\u52a1\u7aef\u5fc5\u987b\u5c06\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u7b2c\u4e8c\u4e2a CONNECT \u62a5\u6587\u5f53\u4f5c\u534f\u8bae\u8fdd\u89c4\u5904\u7406\u5e76\u65ad\u5f00\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19ryaynxa3wjx.png\" alt=\"image-20231201151031703\" \/><\/p>\n<p>\u63a5\u4e0b\u6765\u5c31\u6309\u987a\u5e8f\u67e5\u770b\u6587\u6863&#xff0c;\u4e86\u89e3\u534f\u8bae\u62a5\u6587\u91cc\u6bcf\u4e2a\u5b57\u8282\u5982\u4f55\u7ec4\u6210\u7684\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19niyysfuilss.png\" alt=\"image-20231201151146312\" \/><\/p>\n<p>\u63a5\u4e0b\u6765\u5c31\u5f00\u59cb\u7f16\u5199\u4ee3\u7801&#xff0c;\u6309\u7167\u6587\u6863\u7684\u63d0\u793a&#xff0c;\u7ec4\u5408\u62a5\u6587\u3002<\/p>\n<p>\u9996\u5148&#xff0c;\u5b9a\u4e49\u4e00\u4e2a\u6570\u7ec4&#xff0c;\u7528\u6765\u5b58\u653e\u6211\u4eec\u6309\u7167MQTT\u534f\u8bae\u5c01\u88c5\u7684\u6570\u636e\u3002<\/p>\n<p><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> mqtt_txbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u63a5\u6536\u6570\u636e\u7f13\u5b58\u533a<\/span><\/p>\n<p>\u5728\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf&#xff0c;\u7528\u6765\u4fdd\u5b58\u6570\u7ec4\u7684\u4e0b\u6807&#xff0c;\u6bcf\u8d4b\u503c\u4e00\u6b21&#xff0c;\u5c31\u81ea\u589e&#043;&#043;&#xff1b;<\/p>\n<p><span class=\"token keyword\">int<\/span> mqtt_txlen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>\u30101\u3011\u56fa\u5b9a\u62a5\u6587\u5934<\/h4>\n<p>\u6587\u6863\u8bf4\u4e86&#xff0c;\u6570\u7ec4\u7684\u7b2c\u4e00\u5b57\u8282\u56fa\u5b9a\u4e3a&#xff1a;0x10\u3002 &#xff08;\u4e0d\u61c2\u4e3a\u4ec0\u4e48\u662f0X10&#xff0c;\u4ed4\u7ec6\u770b\u4e0b\u9762\u6587\u6863\u91cc\u7684\u7ea2\u8272\u6846\u6846&#xff0c;\u6587\u6863\u5df2\u7ecf\u628a\u4e8c\u8fdb\u5236\u4f4d\u7684\u6bcf\u4e2a\u4f4d\u90fd\u6807\u6ce8\u51fa\u6765\u4e86&#xff0c;\u5982\u679c\u8fd8\u662f\u770b\u4e0d\u61c2&#xff0c;\u5c31\u9700\u8981\u8865\u4e60\u4e00\u4e0bC\u8bed\u8a00\u7684\u4f4d\u8fd0\u7b97&#xff0c;\u719f\u6089\u4f4d\u8fd0\u7b97\u4e4b\u540e&#xff0c;\u518d\u6765\u770b\u5e94\u8be5\u5c31\u5f88\u5bb9\u6613\u4e86&#xff09;\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19ap5furfrhpr.png\" alt=\"image-20231201151323636\" \/><\/p>\n<p>\u90a3\u4e48\u7b2c\u4e00\u884c\u4ee3\u7801\u5c31\u662f\u8fd9\u4e48\u5199&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x10<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/MQTT Message Type CONNECT<\/span><\/p>\n<p>\u63a5\u4e0b\u6765\u7b2c2\u4e2a\u5b57\u8282&#xff0c;\u6587\u6863\u8ba9\u770b2.2.3\u5c0f\u8282\u7684\u8bf4\u660e&#xff0c;\u90a3\u4e48\u7ffb\u52302.2.3\u5c0f\u8282&#xff0c;\u4e86\u89e3\u5982\u4f55\u586b\u5199\u5269\u4f59\u957f\u5ea6\u503c\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19npfwdvqeixi.png\" alt=\"image-20231201152240500\" \/><\/p>\n<p><img decoding=\"async\" src=\"2025-04-195zjxz11xk3u.png\" alt=\"image-20231201152449794\" \/><\/p>\n<p>\u6839\u636e\u6587\u6863\u8bf4\u660e&#xff0c;\u90a3\u4e48\u7f16\u5199\u4ee3\u7801\u5982\u4e0b&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6(\u4e0d\u5305\u62ec\u56fa\u5b9a\u5934\u90e8)<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\nencodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u597d\u4e86&#xff0c;\u73b0\u5728\u7b2c2\u4e2a\u5b57\u8282\u8d4b\u503c\u5df2\u7ecf\u5b8c\u6bd5\u3002<\/p>\n<h4>\u30102\u3011\u534f\u8bae\u540d<\/h4>\n<p>\u90a3\u4e48\u63a5\u7740\u770b\u5269\u4e0b\u7684\u5b57\u8282\u5982\u4f55\u586b\u5199&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19c1dwtuwtinh.png\" alt=\"image-20231201152607923\" \/><\/p>\n<p>\u6839\u636e\u6587\u6863\u8bf4\u660e&#xff0c;\u7f16\u5199\u4ee3\u7801\u5982\u4e0b&#xff1a; (\u7ee7\u7eed\u6309\u987a\u5e8f\u8d4b\u503c\u5c31\u884c\u4e86)<\/p>\n<p><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u534f\u8bae\u540d<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Protocol Name Length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ Protocol Name Length LSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;M&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for M    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;Q&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for Q    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;T&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for T    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;T&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for T    <\/span><\/p>\n<h4>\u30103\u3011\u534f\u8bae\u7ea7\u522b<\/h4>\n<p>\u770b\u6587\u6863\u8bf4\u660e\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19sto3gq5rgyy.png\" alt=\"image-20231201152846219\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u534f\u8bae\u7ea7\u522b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ MQTT Protocol version &#061; 4   <\/span><\/p>\n<h4>\u30104\u3011\u8fde\u63a5\u6807\u5fd7<\/h4>\n<p>\u5173\u4e8e\u6bcf\u4e2a\u6807\u5fd7\u7684\u542b\u4e49&#xff0c;\u6587\u6863\u5411\u4e0b\u7ffb&#xff0c;\u4e0b\u9762\u6709\u8be6\u7ec6\u7684\u4ecb\u7ecd&#xff0c;\u6bcf\u4e2a\u6807\u5fd7\u4f4d\u7684\u542b\u4e49\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-194xoek4c3umd.png\" alt=\"image-20231201152912933\" \/><\/p>\n<p><img decoding=\"async\" src=\"2025-04-19qyfwhnzts3y.png\" alt=\"image-20231201153643742\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801:<\/p>\n<p><span class=\"token comment\">\/\/\u8fde\u63a5\u6807\u5fd7<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0xc2<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ conn flags <\/span><\/p>\n<h4>\u30105\u3011\u4fdd\u6301\u8fde\u63a5\u7684\u65f6\u95f4<\/h4>\n<p>\u67e5\u770b\u6587\u6863\u8bf4\u660e&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-1922n4vx3i5lq.png\" alt=\"image-20231201153711580\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801&#xff1a;<\/p>\n<p>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Keep-alive Time Length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Keep-alive Time Length LSB  100S\u5fc3\u8df3\u5305 <\/span><\/p>\n<h4>\u30106\u3011 \u53ef\u53d8\u62a5\u5934\u975e\u89c4\u8303\u793a\u4f8b<\/h4>\n<p><img decoding=\"async\" src=\"2025-04-19lqvjtv3zc1f.png\" alt=\"image-20231201153928782\" \/><\/p>\n<h4>\u30107\u3011\u6700\u540e\u90e8\u5206&#xff1a;\u586b\u5199\u5ba2\u6237\u7aefID\u3001\u7528\u6237\u540d\u3001\u5bc6\u7801\u3002<\/h4>\n<p>\u8fd9\u91cc\u9762\u63d0\u5230\u7684\u5ba2\u6237\u7aef\u6807\u8bc6\u7b26\u3001\u7528\u6237\u540d\u3001\u5bc6\u7801\u3002 \u5c31\u662f\u5728\u524d\u9762\u7ae0\u8282\u521b\u5efa\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668&#xff0c;\u5f97\u5230\u7684MQTT\u4e09\u5143\u7ec4\u4fe1\u606f\u3002<\/p>\n<p>\u67e5\u770b\u6587\u6863&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19mlq5tw45e5v.png\" alt=\"image-20231201154144687\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801&#xff1a;<\/p>\n<p>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ Client ID length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ Client ID length LSB  <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> ClientID<span class=\"token punctuation\">,<\/span> ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> ClientIDLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>UsernameLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/username length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/username length LSB    <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> Username<span class=\"token punctuation\">,<\/span> UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> UsernameLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>PasswordLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/password length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/password length LSB  <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> Password<span class=\"token punctuation\">,<\/span> PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> PasswordLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u30108\u3011\u54cd\u5e94<\/h4>\n<p>\u4e0a\u9762\u62a5\u6587\u5c01\u88c5\u5b8c\u6bd5\u4e4b\u540e&#xff0c;\u76f4\u63a5\u5c31\u53ef\u4ee5\u901a\u8fc7\u7f51\u7edc\u63a5\u53e3\u53d1\u9001\u51fa\u53bb\u5c31\u884c\u4e86\u3002<\/p>\n<p>\u524d\u63d0\u662f\u521b\u5efa\u5957\u63a5\u5b57&#xff0c;\u8fde\u63a5\u4e0aMQTT\u670d\u52a1\u5668&#xff0c;\u7136\u540e\u518d\u5c06\u4e0a\u9762\u5c01\u88c5\u597d\u7684\u62a5\u6587\u53d1\u9001\u8fc7\u53bb\u5c31\u884c\u4e86\u3002<\/p>\n<p>\u5173\u4e8e\u5982\u4f55Windows\u4e0b\u5982\u4f55\u521b\u5efa\u5957\u63a5\u5b57&#xff0c;\u8fde\u63a5\u670d\u52a1\u5668&#xff0c;\u524d\u9762\u7ae0\u8282\u4e13\u95e8\u8bb2\u8fc7\u4e86&#xff0c;\u5fd8\u8bb0\u4e86\u53ef\u4ee5\u56de\u53bb\u518d\u770b\u770b\u3002<\/p>\n<p>\u7f16\u5199\u4ee3\u7801\u53d1\u9001\u51fa\u53bb&#xff1a;<\/p>\n<p><span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u4e2a\u51fd\u6570\u91cc\u9762\u7684\u4ee3\u7801&#xff1a; \u5c31\u662f\u76f4\u63a5\u8c03\u7528\u7684\u7f51\u7edc\u63a5\u53e3\u51fd\u6570\u53d1\u9001\u7684\u3002<\/p>\n<p><span class=\"token keyword\">int<\/span> result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>buff<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5411\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">&#061;&#061;<\/span> SOCKET_ERROR<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;send failed with error: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u53d1\u9001\u8fc7\u53bb\u4e4b\u540e&#xff0c;\u670d\u52a1\u5668\u80af\u5b9a\u6709\u8fd4\u56de\u503c\u7684\u3002 \u5931\u8d25&#xff1f;\u6210\u529f&#xff1f; \u90a3\u4e48\u6211\u4eec\u5f97\u5224\u65ad\u3002<\/p>\n<p>\u901a\u8fc7\u54cd\u5e94\u7ae0\u8282\u7684\u6587\u6863\u8bf4\u660e&#xff0c;\u8fd9\u91cc\u63d0\u5230\u4e00\u4e2aCONNACK\u54cd\u5e94\u62a5\u6587&#xff0c;\u662f\u7531\u670d\u52a1\u5668\u4e0b\u53d1\u7ed9\u5ba2\u6237\u7aef\u7684\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19w0wak22o2rl.png\" alt=\"image-20231202123812617\" \/><\/p>\n<p>\u57283.2\u5c0f\u8282&#xff0c;\u8bb2\u89e3\u4e86CONNACK\u62a5\u6587\u7684\u5b57\u6bb5\u542b\u4e49\u3002\u5982\u679c\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u62a5\u6587\u662f\u6b63\u786e\u7684&#xff0c;\u670d\u52a1\u5668\u4f1a\u4e0b\u53d10x20 0x00 \u7684\u786e\u8ba4\u8fde\u63a5\u62a5\u6587\u7ed9\u5ba2\u6237\u7aef&#xff0c;\u544a\u8bc9\u5ba2\u6237\u7aef\u8fde\u63a5\u6210\u529f\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-193wgsvkfmkkd.png\" alt=\"image-20231202124201134\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801&#xff1a; \u5199\u4ee3\u7801\u63a5\u6536\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e&#xff0c;\u5224\u65ad\u8fd4\u56de\u7684\u6570\u636e\u662f\u4e0d\u662f\u7b26\u5408\u8981\u6c42\u3002<\/p>\n<p><span class=\"token function\">Client_GetData<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570\u636e<\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> parket_connetAck<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token number\">0x20<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0x02<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_connetAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&amp;&amp;<\/span> mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_connetAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f   <\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>CONNACK \u62a5\u6587\u9664\u4e86\u56fa\u5b9a\u62a5\u6587\u5934\u4e4b\u5916\u8fd8\u6709\u53ef\u53d8\u62a5\u5934\u3002\u4e5f\u5c31\u662f\u540e\u9762\u8fd8\u67092\u4e2a\u5b57\u8282\u3002 \u6211\u4eec\u53ef\u4ee5\u7ee7\u7eed\u770b\u6587\u6863\u4e0b\u9762\u7684\u4ecb\u7ecd\u3002<\/p>\n<p>\u4e00\u4e2a\u53eb\u8fde\u63a5\u786e\u8ba4\u6807\u5fd7&#xff0c;\u4e00\u4e2a\u53eb\u8fde\u63a5\u8fd4\u56de\u7801\u3002\u6b63\u786e\u7684\u60c5\u51b5\u4e0b&#xff0c;\u8fd9\u4e24\u4e2a\u503c\u5e94\u8be5\u4e3a0x00 0x00.<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19boy5p00d3tw.png\" alt=\"image-20231202125348117\" \/><\/p>\n<p>\u5173\u4e8e\u8fd4\u56de\u7801\u7684\u503c&#xff0c;\u6211\u4eec\u53ef\u4ee5\u5bf9\u5b83\u8fdb\u884c\u5224\u65ad\u3002\u5982\u679c\u8fde\u63a5\u5931\u8d25&#xff0c;\u4e5f\u53ef\u4ee5\u77e5\u9053\u5177\u4f53\u7684\u539f\u56e0\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-194vzwmtx3f4k.png\" alt=\"image-20231202125505479\" \/><\/p>\n<h4>\u30109\u3011\u5b8c\u6574\u4ee3\u7801<\/h4>\n<p><span class=\"token comment\">\/*<br \/>\n\u51fd\u6570\u529f\u80fd: \u767b\u5f55\u670d\u52a1\u5668<br \/>\n\u51fd\u6570\u8fd4\u56de\u503c: 0\u8868\u793a\u6210\u529f 1\u8868\u793a\u5931\u8d25<br \/>\n*\/<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_Connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> ClientID<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> Username<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> Password<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> ClientIDLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>ClientID<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> UsernameLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>Username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> PasswordLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>Password<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> DataLen<span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> size <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934&#043;Payload  \u6bcf\u4e2a\u5b57\u6bb5\u5305\u542b\u4e24\u4e2a\u5b57\u8282\u7684\u957f\u5ea6\u6807\u8bc6<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>ClientIDLen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>UsernameLen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>PasswordLen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x10<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/MQTT Message Type CONNECT<\/span><br \/>\n<span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6(\u4e0d\u5305\u62ec\u56fa\u5b9a\u5934\u90e8)<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\nencodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u534f\u8bae\u540d<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Protocol Name Length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ Protocol Name Length LSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;M&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for M    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;Q&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for Q    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;T&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for T    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;T&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for T    <\/span><br \/>\n<span class=\"token comment\">\/\/\u534f\u8bae\u7ea7\u522b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ MQTT Protocol version &#061; 4    <\/span><br \/>\n<span class=\"token comment\">\/\/\u8fde\u63a5\u6807\u5fd7<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0xc2<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ conn flags <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Keep-alive Time Length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Keep-alive Time Length LSB  100S\u5fc3\u8df3\u5305  <\/span><\/p>\n<p>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ Client ID length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ Client ID length LSB  <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> ClientID<span class=\"token punctuation\">,<\/span> ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> ClientIDLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>UsernameLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/username length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/username length LSB    <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> Username<span class=\"token punctuation\">,<\/span> UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> UsernameLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>PasswordLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/password length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/password length LSB  <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> Password<span class=\"token punctuation\">,<\/span> PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> PasswordLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> mqtt_rxlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nsize <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">Client_GetData<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>size <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> buff<span class=\"token punctuation\">,<\/span> size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u767b\u5f55\u5e94\u7b54:\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> size<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%#X &#034;<\/span><span class=\"token punctuation\">,<\/span> buff<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_connetAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&amp;&amp;<\/span> mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_connetAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f   <\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>6.6 \u5b9e\u73b0MQTT_PublishData\u51fd\u6570<\/h3>\n<h4>\u30101\u3011\u67e5\u770b\u6587\u6863\u8bf4\u660e<\/h4>\n<p>\u548c\u524d\u9762\u4e00\u7ae0\u8282\u4e00\u6837&#xff0c;\u770b\u6587\u6863\u8bf4\u660e\u7f16\u5199\u4ee3\u7801\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19xe1a4ofcq2j.png\" alt=\"image-20231201155454028\" \/><\/p>\n<h4>\u30102\u3011\u56fa\u5b9a\u62a5\u6587\u5934<\/h4>\n<p>\u901a\u8fc7\u6587\u6863\u4e86\u89e3\u5230&#xff0c;\u53d1\u5e03\u6d88\u606f\u7684\u56fa\u5b9a\u62a5\u6587\u5934\u75312\u4e2a\u5b57\u8282\u7ec4\u6210\u3002\u7b2c\u4e00\u4e2a\u5b57\u8282\u6bcf\u4e2a\u4f4d\u7684\u7ec4\u6210\u542b\u4e49\u53ef\u770b\u6587\u6863\u7684\u8868\u683c\u4ecb\u7ecd\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19hlufj0nacxi.png\" alt=\"image-20231202125731456\" \/><\/p>\n<p>\u6700\u9ad84\u4f4d\u662fMQTT\u63a7\u5236\u62a5\u6587\u7c7b\u578b&#xff0c;\u56fa\u5b9a\u7684\u503c&#xff1a;0x3<\/p>\n<p>\u540e\u97624\u4e2a\u5b57\u8282\u5206\u4e3a\u662fDUP(\u91cd\u53d1\u6807\u5fd7)\u3001QOS\u7b49\u7ea7(\u670d\u52a1\u8d28\u91cf\u7b49\u7ea7)\u3001RETAIN(\u6d88\u606f\u7684\u4fdd\u7559\u6807\u5fd7)\u3002<\/p>\n<p>DUP(\u91cd\u53d1\u6807\u5fd7)&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19rxotx1z3ict.png\" alt=\"image-20231202130033301\" \/><\/p>\n<p>QOS\u7b49\u7ea7(\u670d\u52a1\u8d28\u91cf\u7b49\u7ea7)&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19r4uuan0aehn.png\" alt=\"image-20231202130109342\" \/><\/p>\n<p>RETAIN(\u4fdd\u7559\u6807\u5fd7\u2013\u56fa\u5b9a\u4f4d0)&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19zb1om1lqp1h.png\" alt=\"image-20231202130509553\" \/><\/p>\n<p>\u90a3\u4e48\u7ecf\u8fc7\u6587\u6863\u7684\u89e3\u91ca&#xff0c;\u6211\u4eec\u7f16\u5199\u4ee3\u7801\u5982\u4e0b&#xff1a; (\u5173\u4e8e\u540e\u97624\u4e2a\u5b57\u8282\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u8bbe\u7f6e)<\/p>\n<p><span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x30<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ MQTT Message Type PUBLISH  <\/span><\/p>\n<h4>\u30103\u3011\u5269\u4f59\u5b57\u6bb5\u957f\u5ea6<\/h4>\n<p>\u56fa\u5b9a\u62a5\u6587\u5934\u7684\u7b2c2\u4e2a\u5b57\u8282\u662f\u586b\u5199\u5269\u4f59\u5b57\u6bb5\u957f\u5ea6\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19ispacthhm0r.png\" alt=\"image-20231202131201868\" \/><\/p>\n<p>\u5728\u6587\u6863\u91cc\u5bf9\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5\u8ba1\u7b97\u7684\u4ecb\u7ecd&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-193xcoluh3u2b.png\" alt=\"image-20231202131112673\" \/><\/p>\n<p>\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5&#xff1a; \u7b49\u4e8e\u53ef\u53d8\u62a5\u5934\u7684\u957f\u5ea6\u52a0\u4e0a\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6\u3002<\/p>\n<p>\u8fd9\u91cc\u5148\u8981\u4e86\u89e3&#xff1a; \u4ec0\u4e48\u662f\u53ef\u53d8\u62a5\u5934&#xff1f; \u4ec0\u4e48\u662f\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6&#xff1f;<\/p>\n<p>\u5f80\u4e0b\u7ffb\u6587\u6863&#xff0c;\u53ef\u770b\u5230\u53ef\u53d8\u62a5\u5934\u7684\u4ecb\u7ecd\u3002 **\u53ef\u53d8\u62a5\u5934\u662f&#xff1a;\u6309\u987a\u5e8f\u5305\u542b\u4e3b\u9898\u540d\u548c\u62a5\u6587\u6807\u8bc6\u7b26\u3002 ** \u800c\u62a5\u6587\u6807\u8bc6\u7b26\u53ea\u6709\u5728QOS\u4e3a1\u6216\u80052\u7684\u65f6\u5019\u624d\u6709\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19rbj0ily31up.png\" alt=\"image-20231202132449071\" \/><\/p>\n<p>\u518d\u5f80\u4e0b\u7ffb\u6587\u6863&#xff0c;\u53ef\u770b\u5230\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6\u7684\u4ecb\u7ecd\u3002\u6709\u6548\u8f7d\u8377\u5305\u542b\u5c06\u88ab\u53d1\u5e03\u7684\u5e94\u7528\u6d88\u606f\u3002\u6570\u636e\u7684\u5185\u5bb9\u548c\u683c\u5f0f\u662f\u5e94\u7528\u7279\u5b9a\u7684\u3002\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6\u8fd9\u6837\u8ba1\u7b97&#xff1a;\u7528\u56fa\u5b9a \u62a5\u5934\u4e2d\u7684\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5\u7684\u503c\u51cf\u53bb\u53ef\u53d8\u62a5\u5934\u7684\u957f\u5ea6\u3002\u5305\u542b\u96f6\u957f\u5ea6\u6709\u6548\u8f7d\u8377\u7684 PUBLISH \u62a5\u6587\u662f\u5408\u6cd5\u7684\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19eh1hkpx3emr.png\" alt=\"image-20231202132740579\" \/><\/p>\n<p>\u7ecf\u8fc7\u6587\u6863\u7684\u4ecb\u7ecd&#xff0c;\u6211\u4eec\u77e5\u9053\u4e86\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5\u5982\u4f55\u4ecb\u7ecd\u3002<\/p>\n<p>\u90a3\u4e48\u8fd9\u4e2a\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5\u8ba1\u7b97\u51fa\u6765\u4e4b\u540e&#xff0c;\u5982\u4f55\u8d4b\u503c\u5230\u62a5\u6587\u6570\u7ec4\u91cc\u53bb&#xff1f; \u5176\u5b9e\u5728Connect\u62a5\u6587\u7684\u56fa\u5b9a\u5b57\u6bb5\u7b2c2\u4e2a\u5b57\u8282\u4e5f\u662f\u8981\u5929\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5&#xff0c;\u5728Connect\u62a5\u6587\u7684\u7ae0\u8282\u5df2\u7ecf\u4ecb\u7ecd\u8fc7&#xff0c;\u5728\u6587\u6863\u76842.2.3\u5c0f\u8282\u7684\u6709\u8be6\u7ec6\u8bf4\u660e&#xff0c;\u90a3\u4e48\u7ffb\u52302.2.3\u5c0f\u8282&#xff0c;\u4e86\u89e3\u5982\u4f55\u586b\u5199\u5269\u4f59\u957f\u5ea6\u503c\u3002 (\u5176\u5b9e\u6211\u4eec\u4e0a\u4e00\u8282\u5df2\u7ecf\u4ecb\u7ecd\u4e86\u4e00\u904d)<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19npfwdvqeixi.png\" alt=\"image-20231201152240500\" \/><\/p>\n<p><img decoding=\"async\" src=\"2025-04-195zjxz11xk3u.png\" alt=\"image-20231201152449794\" \/><\/p>\n<p>\u63a5\u4e0b\u6765\u5c31\u7f16\u5199\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> topicLength <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>topic<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/\u8ba1\u7b97\u4e3b\u9898\u7684\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> messageLength <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>message<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8ba1\u7b97\u53d1\u9001\u7684\u6d88\u606f\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> DataLen<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u4fdd\u5b58\u6700\u7ec8\u957f\u5ea6<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6\u8fd9\u6837\u8ba1\u7b97&#xff1a;\u7528\u56fa\u5b9a\u62a5\u5934\u4e2d\u7684\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5\u7684\u503c\u51cf\u53bb\u53ef\u53d8\u62a5\u5934\u7684\u957f\u5ea6<\/span><br \/>\n<span class=\"token comment\">\/\/QOS\u4e3a0\u65f6\u6ca1\u6709\u6807\u8bc6\u7b26<\/span><br \/>\n<span class=\"token comment\">\/\/\u6570\u636e\u957f\u5ea6             \u4e3b\u9898\u540d   \u62a5\u6587\u6807\u8bc6\u7b26   \u6709\u6548\u8f7d\u8377<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>qos<span class=\"token punctuation\">)<\/span>DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> topicLength<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> messageLength<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">else<\/span>DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> topicLength<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> messageLength<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    DataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        encodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>\u30104\u3011\u53ef\u53d8\u62a5\u5934<\/h4>\n<p><img decoding=\"async\" src=\"2025-04-19z4ch0lc020f.png\" alt=\"image-20231202130801113\" \/><\/p>\n<p>PUBLISH \u62a5\u6587\u53ef\u53d8\u62a5\u5934\u975e\u89c4\u8303\u793a\u4f8b:<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19jwc3vjev3ym.png\" alt=\"image-20231202133246434\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801&#xff1a;<\/p>\n<p>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6MSB<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6LSB <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> topic<span class=\"token punctuation\">,<\/span> topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u62f7\u8d1d\u4e3b\u9898<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> topicLength<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u62a5\u6587\u6807\u8bc6\u7b26<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>qos<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nid<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u63a5\u7740\u5c31\u6dfb\u52a0\u6709\u6548\u8f7d\u8377&#xff0c;\u4e5f\u5c31\u662f\u5b9e\u9645\u53d1\u9001\u7684\u6d88\u606f\u5185\u5bb9\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19sl2xgzvgtuq.png\" alt=\"image-20231202135619158\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801:<\/p>\n<p><span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> message<span class=\"token punctuation\">,<\/span> messageLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> messageLength<span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6700\u540e\u5c06\u62a5\u6587\u53d1\u9001\u51fa\u53bb&#xff1a;<\/p>\n<p><span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>\u30105\u3011\u5b8c\u6574\u4ee3\u7801<\/h4>\n<p><span class=\"token comment\">\/\/MQTT\u53d1\u5e03\u6570\u636e\u6253\u5305\u51fd\u6570<\/span><br \/>\n<span class=\"token comment\">\/\/topic   \u4e3b\u9898 <\/span><br \/>\n<span class=\"token comment\">\/\/message \u6d88\u606f<\/span><br \/>\n<span class=\"token comment\">\/\/qos     \u6d88\u606f\u7b49\u7ea7 <\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_PublishData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> topic<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> message<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> qos<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> topicLength <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>topic<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> messageLength <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>message<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> id <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> DataLen<span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u4e0a\u62a5JSON\u6d88\u606f\u957f\u5ea6:%d\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> messageLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;message&#061;%s\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> message<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6\u8fd9\u6837\u8ba1\u7b97&#xff1a;\u7528\u56fa\u5b9a\u62a5\u5934\u4e2d\u7684\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5\u7684\u503c\u51cf\u53bb\u53ef\u53d8\u62a5\u5934\u7684\u957f\u5ea6<\/span><br \/>\n<span class=\"token comment\">\/\/QOS\u4e3a0\u65f6\u6ca1\u6709\u6807\u8bc6\u7b26<\/span><br \/>\n<span class=\"token comment\">\/\/\u6570\u636e\u957f\u5ea6             \u4e3b\u9898\u540d   \u62a5\u6587\u6807\u8bc6\u7b26   \u6709\u6548\u8f7d\u8377<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>qos<span class=\"token punctuation\">)<\/span>DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> topicLength<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> messageLength<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">else<\/span>DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> topicLength<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> messageLength<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x30<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ MQTT Message Type PUBLISH  <\/span><\/p>\n<p><span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\nencodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6MSB<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6LSB <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> topic<span class=\"token punctuation\">,<\/span> topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u62f7\u8d1d\u4e3b\u9898<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> topicLength<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u62a5\u6587\u6807\u8bc6\u7b26<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>qos<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nid<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> message<span class=\"token punctuation\">,<\/span> messageLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> messageLength<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> mqtt_txlen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u30106\u3011\u53d1\u5e03\u786e\u8ba4<\/h4>\n<p>\u5982\u679c\u6d88\u606f\u8d28\u91cf\u5927\u4e8e0&#xff0c;\u90a3\u4e48\u53ef\u4ee5\u7ee7\u7eed\u770b\u6587\u6863\u4e0b\u9762\u7684\u53d1\u5e03\u786e\u8ba4&#xff0c;\u5bf9\u672c\u6b21\u53d1\u9001\u7684\u6d88\u606f\u8fdb\u884c\u54cd\u5e94\u5904\u7406\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19ka4leatcb1a.png\" alt=\"image-20231202140427509\" \/><\/p>\n<p><img decoding=\"async\" src=\"2025-04-19qf03n1zvucz.png\" alt=\"image-20231202140536152\" \/><\/p>\n<h3>6.7 \u5b9e\u73b0 MQTT_SubscribeTopic \u51fd\u6570<\/h3>\n<h4>\u30101\u3011\u67e5\u770b\u6587\u6863&#xff1a;\u8ba2\u9605\u4e3b\u9898\u7684\u683c\u5f0f<\/h4>\n<p>\u548c\u524d\u9762\u4e00\u6837&#xff0c;\u67e5\u770b\u6587\u6863\u7684\u8bf4\u660e&#xff0c;\u7f16\u5199\u4ee3\u7801\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19iep5ewjieof.png\" alt=\"image-20231201155946444\" \/><\/p>\n<h4>\u30102\u3011\u67e5\u770b\u6587\u6863&#xff1a;\u53d6\u6d88\u8ba2\u9605\u7684\u683c\u5f0f<\/h4>\n<p><img decoding=\"async\" src=\"2025-04-19rbubx4imshv.png\" alt=\"image-20231201160155317\" \/><\/p>\n<h4>\u30103\u3011\u56fa\u5b9a\u62a5\u5934<\/h4>\n<p>\u8ba2\u9605\u4e3b\u9898\u548c\u53d6\u6d88\u8ba2\u9605\u4e3b\u9898\u683c\u5f0f\u4e00\u6837\u7684&#xff0c;\u53ea\u662f\u56fa\u5b9a\u62a5\u5934\u4e0d\u4e00\u6837\u3002<\/p>\n<p>\u53ef\u4ee5\u5c01\u88c5\u4e00\u4e2a\u51fd\u6570&#xff0c;\u4f20\u5165\u4e00\u4e2a\u53c2\u6570\u5b9e\u73b0\u4e24\u79cd\u529f\u80fd\u3002<\/p>\n<p>\u7f16\u5199\u5224\u65ad\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>whether<span class=\"token punctuation\">)<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x82<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6d88\u606f\u7c7b\u578b\u548c\u6807\u5fd7\u8ba2\u9605<\/span><br \/>\n<span class=\"token keyword\">else<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0xA2<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/\u53d6\u6d88\u8ba2\u9605<\/span><\/p>\n<p>\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19rftxx2thhsj.png\" alt=\"image-20231202141516154\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> topiclen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>topic<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>topiclen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>whether <span class=\"token operator\">?<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934\u7684\u957f\u5ea6&#xff08;2\u5b57\u8282&#xff09;\u52a0\u4e0a\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6<\/span><\/p>\n<p>\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5\u7684\u586b\u5199\u89c4\u5219\u4e0e\u524d\u9762\u4e00\u6837\u3002<\/p>\n<p>\u7f16\u5199\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    DataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        encodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>\u30104\u3011\u53ef\u53d8\u62a5\u5934<\/h4>\n<p><img decoding=\"async\" src=\"2025-04-19kzsnt0nqftc.png\" alt=\"image-20231202141435800\" \/><\/p>\n<p>\u7f16\u5199\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6d88\u606f\u6807\u8bc6\u7b26 MSB<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x01<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/\u6d88\u606f\u6807\u8bc6\u7b26 LSB<\/span><\/p>\n<p><img decoding=\"async\" src=\"2025-04-1934riw1fonc0.png\" alt=\"image-20231202140915523\" \/><\/p>\n<h4>\u30105\u3011\u5b8c\u6574\u4ee3\u7801<\/h4>\n<p><span class=\"token comment\">\/*<br \/>\n\u51fd\u6570\u529f\u80fd: MQTT\u8ba2\u9605\/\u53d6\u6d88\u8ba2\u9605\u6570\u636e\u6253\u5305\u51fd\u6570<br \/>\n\u51fd\u6570\u53c2\u6570:<br \/>\ntopic       \u4e3b\u9898<br \/>\nqos         \u6d88\u606f\u7b49\u7ea7 0:\u6700\u591a\u5206\u53d1\u4e00\u6b21  1: \u81f3\u5c11\u5206\u53d1\u4e00\u6b21  2: \u4ec5\u5206\u53d1\u4e00\u6b21<br \/>\nwhether     \u8ba2\u9605\/\u53d6\u6d88\u8ba2\u9605\u8bf7\u6c42\u5305 (1\u8868\u793a\u8ba2\u9605,0\u8868\u793a\u53d6\u6d88\u8ba2\u9605)<br \/>\n\u8fd4\u56de\u503c: 0\u8868\u793a\u6210\u529f 1\u8868\u793a\u5931\u8d25<br \/>\n*\/<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_SubscribeTopic<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> topic<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> qos<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> whether<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> size <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> topiclen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>topic<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>topiclen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>whether <span class=\"token operator\">?<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934\u7684\u957f\u5ea6&#xff08;2\u5b57\u8282&#xff09;\u52a0\u4e0a\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6<\/span><br \/>\n<span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>whether<span class=\"token punctuation\">)<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x82<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6d88\u606f\u7c7b\u578b\u548c\u6807\u5fd7\u8ba2\u9605<\/span><br \/>\n<span class=\"token keyword\">else<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0xA2<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/\u53d6\u6d88\u8ba2\u9605<\/span><br \/>\n<span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\nencodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6d88\u606f\u6807\u8bc6\u7b26 MSB<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x01<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/\u6d88\u606f\u6807\u8bc6\u7b26 LSB<\/span><br \/>\n<span class=\"token comment\">\/\/\u6709\u6548\u8f7d\u8377<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>topiclen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6 MSB<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>topiclen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6 LSB   <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> topic<span class=\"token punctuation\">,<\/span> topiclen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> topiclen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>whether<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> qos<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/QoS\u7ea7\u522b<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> mqtt_rxlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/printf(&#034;\u8ba2\u9605\u6d88\u606f\u53d1\u5e03\u6210\u529f\\\\n&#034;);<\/span><br \/>\nsize <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">Client_GetData<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>size <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> buff<span class=\"token punctuation\">,<\/span> size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8ba2\u9605\u5e94\u7b54:\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> size<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%#X &#034;<\/span><span class=\"token punctuation\">,<\/span> buff<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_subAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&amp;&amp;<\/span> mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_subAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f   <\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">Sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5931\u8d25<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h2>\u4e03\u3001\u8fd0\u884c\u9879\u76ee\u3001\u8fde\u63a5\u534e\u4e3a\u4e91\u670d\u52a1\u5668<\/h2>\n<h3>7.1 \u6574\u4e2a\u9879\u76ee\u7684\u5b8c\u6574\u4ee3\u7801<\/h3>\n<p>\u524d\u9762\u7ae0\u8282\u9646\u7eed\u5df2\u7ecf\u7f16\u5199\u597d\u4e86\u91cd\u8981\u7684\u51fd\u6570&#xff0c;\u90a3\u4e48\u8fd9\u91cc\u5c31\u8d34\u51fa\u6211\u7f16\u5199\u597d\u7684\u6574\u4f53\u7684\u4ee3\u7801,\u8fdb\u884c\u8fd0\u884c\u6d4b\u8bd5&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19r11sm1r30le.png\" alt=\"image-20231201160401486\" \/><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdlib.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;time.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\"><span class=\"token function\">warning<\/span><span class=\"token punctuation\">(<\/span>disable<span class=\"token operator\">:<\/span><span class=\"token number\">4996<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;winsock2.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;ws2tcpip.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\"><span class=\"token function\">comment<\/span><span class=\"token punctuation\">(<\/span>lib<span class=\"token punctuation\">,<\/span> <\/span><span class=\"token string\">&#034;ws2_32.lib&#034;<\/span><span class=\"token expression\"><span class=\"token punctuation\">)<\/span> <\/span><span class=\"token comment\">\/\/\u544a\u8bc9\u7f16\u8bd1\u5668\u94fe\u63a5Winsock\u5e93<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;MQTT\u534f\u8bae\u76f8\u5173\u7684\u5b50\u51fd\u6570\u58f0\u660e&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u53d1\u5e03\u4e3b\u9898<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_PublishData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> topic<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> message<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> qos<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u8ba2\u9605\u6216\u8005\u53d6\u6d88\u8ba2\u9605\u4e3b\u9898<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_SubscribeTopic<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> topic<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> qos<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> whether<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u767b\u5f55MQTT\u670d\u52a1\u5668<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_Connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> ClientID<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> Username<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> Password<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/MQTT\u534f\u8bae\u7f13\u51b2\u533a\u521d\u59cb\u5316<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">MQTT_Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u8c03\u7528\u5e95\u5c42\u63a5\u53e3\u53d1\u9001\u6570\u636e\u5305<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> buf<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/MQTT\u534f\u8bae\u91cc\u6700\u5e95\u5c42\u7684\u63a5\u53e3&#xff0c;\u6700\u5e95\u5c42\u7684\u5982\u679c\u8981\u79fb\u690d\u534f\u8bae\u5230\u5176\u4ed6\u5730\u65b9\u8fd0\u884c&#xff0c;\u90a3\u4e48\u6539\u8fd9\u91cc\u5c31\u884c\u4e86\u3002\u5176\u4ed6\u5730\u65b9\u4e0d\u7528\u6539\u7684\u3002<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">Client_SendData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> buff<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u53d1\u9001\u6570\u636e\u5230\u670d\u52a1\u5668<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">Client_GetData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570\u636e<\/span><\/p>\n<p><span class=\"token comment\">\/\/&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;\u5168\u5c40\u53d8\u91cf\u5b9a\u4e49&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">BYTE0<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>dwTemp<span class=\"token punctuation\">)<\/span>       <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>dwTemp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">BYTE1<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>dwTemp<span class=\"token punctuation\">)<\/span>       <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>dwTemp<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">BYTE2<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>dwTemp<span class=\"token punctuation\">)<\/span>       <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>dwTemp<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">BYTE3<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>dwTemp<span class=\"token punctuation\">)<\/span>       <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>dwTemp<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><\/p>\n<p><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u53d1\u9001\u6570\u636e\u7f13\u5b58\u533a<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> mqtt_txbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u63a5\u6536\u6570\u636e\u7f13\u5b58\u533a<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> mqtt_rxlen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> mqtt_txlen<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">enum<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/\/\u540d\u5b57     \u503c \u62a5\u6587\u6d41\u52a8\u65b9\u5411 \u63cf\u8ff0<\/span><br \/>\nM_RESERVED1 <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u7981\u6b62\u4fdd\u7559<\/span><br \/>\nM_CONNECT<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u5ba2\u6237\u7aef\u8bf7\u6c42\u8fde\u63a5\u670d\u52a1\u7aef<\/span><br \/>\nM_CONNACK<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u670d\u52a1\u7aef\u5230\u5ba2\u6237\u7aef\u8fde\u63a5\u62a5\u6587\u786e\u8ba4<\/span><br \/>\nM_PUBLISH<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u4e24\u4e2a\u65b9\u5411\u90fd\u5141\u8bb8\u53d1\u5e03\u6d88\u606f<\/span><br \/>\nM_PUBACK<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u4e24\u4e2a\u65b9\u5411\u90fd\u5141\u8bb8QoS 1\u6d88\u606f\u53d1\u5e03\u6536\u5230\u786e\u8ba4<\/span><br \/>\nM_PUBREC<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u4e24\u4e2a\u65b9\u5411\u90fd\u5141\u8bb8\u53d1\u5e03\u6536\u5230&#xff08;\u4fdd\u8bc1\u4ea4\u4ed8\u7b2c\u4e00\u6b65&#xff09;<\/span><br \/>\nM_PUBREL<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u4e24\u4e2a\u65b9\u5411\u90fd\u5141\u8bb8\u53d1\u5e03\u91ca\u653e&#xff08;\u4fdd\u8bc1\u4ea4\u4ed8\u7b2c\u4e8c\u6b65&#xff09;<\/span><br \/>\nM_PUBCOMP<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u4e24\u4e2a\u65b9\u5411\u90fd\u5141\u8bb8QoS 2\u6d88\u606f\u53d1\u5e03\u5b8c\u6210&#xff08;\u4fdd\u8bc1\u4ea4\u4e92\u7b2c\u4e09\u6b65&#xff09;<\/span><br \/>\nM_SUBSCRIBE<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u5ba2\u6237\u7aef\u8ba2\u9605\u8bf7\u6c42<\/span><br \/>\nM_SUBACK<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u670d\u52a1\u7aef\u5230\u5ba2\u6237\u7aef\u8ba2\u9605\u8bf7\u6c42\u62a5\u6587\u786e\u8ba4<\/span><br \/>\nM_UNSUBSCRIBE<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u5ba2\u6237\u7aef\u53d6\u6d88\u8ba2\u9605\u8bf7\u6c42<\/span><br \/>\nM_UNSUBACK<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u670d\u52a1\u7aef\u5230\u5ba2\u6237\u7aef\u53d6\u6d88\u8ba2\u9605\u62a5\u6587\u786e\u8ba4<\/span><br \/>\nM_PINGREQ<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u5fc3\u8df3\u8bf7\u6c42<\/span><br \/>\nM_PINGRESP<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u670d\u52a1\u7aef\u5230\u5ba2\u6237\u7aef\u5fc3\u8df3\u54cd\u5e94<\/span><br \/>\nM_DISCONNECT<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5<\/span><br \/>\nM_RESERVED2<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u7981\u6b62\u4fdd\u7559<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>_typdef_mqtt_message<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f\u670d\u52a1\u5668\u56de\u5e94 20 02 00 00<\/span><br \/>\n<span class=\"token comment\">\/\/\u5ba2\u6237\u7aef\u4e3b\u52a8\u65ad\u5f00\u8fde\u63a5 e0 00<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> parket_connetAck<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token number\">0x20<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0x02<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0x00<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0x00<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> parket_disconnet<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token number\">0xe0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0x00<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> parket_heart<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token number\">0xc0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0x00<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> parket_heart_reply<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token number\">0xc0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0x00<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> parket_subAck<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token number\">0x90<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">0x03<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">MQTT_Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/\/\u7f13\u51b2\u533a\u8d4b\u503c<\/span><br \/>\nmqtt_rxlen <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> mqtt_rxlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n\u51fd\u6570\u529f\u80fd: \u767b\u5f55\u670d\u52a1\u5668<br \/>\n\u51fd\u6570\u8fd4\u56de\u503c: 0\u8868\u793a\u6210\u529f 1\u8868\u793a\u5931\u8d25<br \/>\n*\/<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_Connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> ClientID<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> Username<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> Password<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> ClientIDLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>ClientID<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> UsernameLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>Username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> PasswordLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>Password<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> DataLen<span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> size <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934&#043;Payload  \u6bcf\u4e2a\u5b57\u6bb5\u5305\u542b\u4e24\u4e2a\u5b57\u8282\u7684\u957f\u5ea6\u6807\u8bc6<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>ClientIDLen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>UsernameLen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>PasswordLen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x10<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/MQTT Message Type CONNECT<\/span><br \/>\n<span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6(\u4e0d\u5305\u62ec\u56fa\u5b9a\u5934\u90e8)<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\nencodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u534f\u8bae\u540d<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Protocol Name Length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ Protocol Name Length LSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;M&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for M    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;Q&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for Q    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;T&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for T    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;T&#039;<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ ASCII Code for T    <\/span><br \/>\n<span class=\"token comment\">\/\/\u534f\u8bae\u7ea7\u522b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ MQTT Protocol version &#061; 4    <\/span><br \/>\n<span class=\"token comment\">\/\/\u8fde\u63a5\u6807\u5fd7<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0xc2<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ conn flags <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Keep-alive Time Length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ Keep-alive Time Length LSB  100S\u5fc3\u8df3\u5305  <\/span><\/p>\n<p>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ Client ID length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ Client ID length LSB  <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> ClientID<span class=\"token punctuation\">,<\/span> ClientIDLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> ClientIDLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>UsernameLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/username length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/username length LSB    <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> Username<span class=\"token punctuation\">,<\/span> UsernameLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> UsernameLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>PasswordLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/password length MSB    <\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/password length LSB  <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> Password<span class=\"token punctuation\">,<\/span> PasswordLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> PasswordLen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> mqtt_rxlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nsize <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">Client_GetData<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>size <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> buff<span class=\"token punctuation\">,<\/span> size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u767b\u5f55\u5e94\u7b54:\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> size<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%#X &#034;<\/span><span class=\"token punctuation\">,<\/span> buff<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_connetAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&amp;&amp;<\/span> mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_connetAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f   <\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n\u51fd\u6570\u529f\u80fd: MQTT\u8ba2\u9605\/\u53d6\u6d88\u8ba2\u9605\u6570\u636e\u6253\u5305\u51fd\u6570<br \/>\n\u51fd\u6570\u53c2\u6570:<br \/>\ntopic       \u4e3b\u9898<br \/>\nqos         \u6d88\u606f\u7b49\u7ea7 0:\u6700\u591a\u5206\u53d1\u4e00\u6b21  1: \u81f3\u5c11\u5206\u53d1\u4e00\u6b21  2: \u4ec5\u5206\u53d1\u4e00\u6b21<br \/>\nwhether     \u8ba2\u9605\/\u53d6\u6d88\u8ba2\u9605\u8bf7\u6c42\u5305 (1\u8868\u793a\u8ba2\u9605,0\u8868\u793a\u53d6\u6d88\u8ba2\u9605)<br \/>\n\u8fd4\u56de\u503c: 0\u8868\u793a\u6210\u529f 1\u8868\u793a\u5931\u8d25<br \/>\n*\/<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_SubscribeTopic<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> topic<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> qos<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> whether<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> i<span class=\"token punctuation\">,<\/span> j<span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> size <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> buff<span class=\"token punctuation\">[<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> topiclen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>topic<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>topiclen <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>whether <span class=\"token operator\">?<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934\u7684\u957f\u5ea6&#xff08;2\u5b57\u8282&#xff09;\u52a0\u4e0a\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6<\/span><br \/>\n<span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>whether<span class=\"token punctuation\">)<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x82<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6d88\u606f\u7c7b\u578b\u548c\u6807\u5fd7\u8ba2\u9605<\/span><br \/>\n<span class=\"token keyword\">else<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0xA2<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/\u53d6\u6d88\u8ba2\u9605<\/span><br \/>\n<span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\nencodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/\u53ef\u53d8\u62a5\u5934<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6d88\u606f\u6807\u8bc6\u7b26 MSB<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x01<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/\u6d88\u606f\u6807\u8bc6\u7b26 LSB<\/span><br \/>\n<span class=\"token comment\">\/\/\u6709\u6548\u8f7d\u8377<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>topiclen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6 MSB<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>topiclen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6 LSB   <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> topic<span class=\"token punctuation\">,<\/span> topiclen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> topiclen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>whether<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> qos<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/QoS\u7ea7\u522b<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">memset<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> mqtt_rxlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/printf(&#034;\u8ba2\u9605\u6d88\u606f\u53d1\u5e03\u6210\u529f\\\\n&#034;);<\/span><br \/>\nsize <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">Client_GetData<\/span><span class=\"token punctuation\">(<\/span>buff<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>size <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">continue<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">,<\/span> buff<span class=\"token punctuation\">,<\/span> size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8ba2\u9605\u5e94\u7b54:\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>j <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> j <span class=\"token operator\">&lt;<\/span> size<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%#X &#034;<\/span><span class=\"token punctuation\">,<\/span> buff<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_subAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&amp;&amp;<\/span> mqtt_rxbuf<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> parket_subAck<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f   <\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">Sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5931\u8d25<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/MQTT\u53d1\u5e03\u6570\u636e\u6253\u5305\u51fd\u6570<\/span><br \/>\n<span class=\"token comment\">\/\/topic   \u4e3b\u9898 <\/span><br \/>\n<span class=\"token comment\">\/\/message \u6d88\u606f<\/span><br \/>\n<span class=\"token comment\">\/\/qos     \u6d88\u606f\u7b49\u7ea7 <\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token function\">MQTT_PublishData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> topic<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> message<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> qos<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> topicLength <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>topic<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> messageLength <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span><span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>message<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> id <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> DataLen<span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u4e0a\u62a5JSON\u6d88\u606f\u957f\u5ea6:%d\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> messageLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;message&#061;%s\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> message<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/\u6709\u6548\u8f7d\u8377\u7684\u957f\u5ea6\u8fd9\u6837\u8ba1\u7b97&#xff1a;\u7528\u56fa\u5b9a\u62a5\u5934\u4e2d\u7684\u5269\u4f59\u957f\u5ea6\u5b57\u6bb5\u7684\u503c\u51cf\u53bb\u53ef\u53d8\u62a5\u5934\u7684\u957f\u5ea6<\/span><br \/>\n<span class=\"token comment\">\/\/QOS\u4e3a0\u65f6\u6ca1\u6709\u6807\u8bc6\u7b26<\/span><br \/>\n<span class=\"token comment\">\/\/\u6570\u636e\u957f\u5ea6             \u4e3b\u9898\u540d   \u62a5\u6587\u6807\u8bc6\u7b26   \u6709\u6548\u8f7d\u8377<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>qos<span class=\"token punctuation\">)<\/span>DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> topicLength<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> messageLength<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">else<\/span>DataLen <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> topicLength<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> messageLength<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u56fa\u5b9a\u62a5\u5934<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a7\u5236\u62a5\u6587\u7c7b\u578b<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x30<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ MQTT Message Type PUBLISH  <\/span><\/p>\n<p><span class=\"token comment\">\/\/\u5269\u4f59\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">do<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> encodedByte <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">%<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nDataLen <span class=\"token operator\">&#061;<\/span> DataLen <span class=\"token operator\">\/<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ if there are more data to encode, set the top bit of this byte<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\nencodedByte <span class=\"token operator\">&#061;<\/span> encodedByte <span class=\"token operator\">|<\/span> <span class=\"token number\">128<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> encodedByte<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>DataLen <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6MSB<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u4e3b\u9898\u957f\u5ea6LSB <\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> topic<span class=\"token punctuation\">,<\/span> topicLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u62f7\u8d1d\u4e3b\u9898<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> topicLength<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u62a5\u6587\u6807\u8bc6\u7b26<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>qos<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE1<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">BYTE0<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nid<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">memcpy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mqtt_txbuf<span class=\"token punctuation\">[<\/span>mqtt_txlen<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> message<span class=\"token punctuation\">,<\/span> messageLength<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nmqtt_txlen <span class=\"token operator\">&#043;&#061;<\/span> messageLength<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span>mqtt_txbuf<span class=\"token punctuation\">,<\/span> mqtt_txlen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> mqtt_txlen<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">MQTT_SendBuf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> buf<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">short<\/span> len<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">Client_SendData<\/span><span class=\"token punctuation\">(<\/span>buf<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u53d1\u9001\u6570\u636e\u5230\u670d\u52a1\u5668<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;MQTT\u670d\u52a1\u5668\u7684\u53c2\u6570&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<\/span><br \/>\n<span class=\"token comment\">\/\/\u670d\u52a1\u5668IP<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">SERVER_IP<\/span> <span class=\"token string\">&#034;117.78.5.125&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">SERVER_PORT<\/span> <span class=\"token expression\"><span class=\"token number\">1883<\/span> <\/span><span class=\"token comment\">\/\/\u7aef\u53e3\u53f7<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/MQTT\u4e09\u5143\u7ec4<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">ClientID<\/span> <span class=\"token string\">&#034;65697df3585c81787ad4da82_stm32_0_0_2023120106&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">Username<\/span> <span class=\"token string\">&#034;65697df3585c81787ad4da82_stm32&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">Password<\/span> <span class=\"token string\">&#034;12cc9b1f637da8d755fa2cbd007bb669e6f292e3e63017538b5e6e13eef0cf58&#034;<\/span><span class=\"token comment\">\/\/\u5bc6\u6587 <\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/\u8ba2\u9605\u4e3b\u9898:<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">SET_TOPIC<\/span>  <span class=\"token string\">&#034;$oc\/devices\/65697df3585c81787ad4da82_stm32\/sys\/messages\/down&#034;<\/span><span class=\"token comment\">\/\/\u8ba2\u9605<\/span><\/span><br \/>\n<span class=\"token comment\">\/\/\u53d1\u5e03\u4e3b\u9898:<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">POST_TOPIC<\/span> <span class=\"token string\">&#034;$oc\/devices\/65697df3585c81787ad4da82_stm32\/sys\/properties\/report&#034;<\/span><span class=\"token comment\">\/\/\u53d1\u5e03<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;\u4e3b\u51fd\u6570&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<\/span><\/p>\n<p><span class=\"token keyword\">char<\/span> mqtt_message<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6570\u636e\u7f13\u5b58\u533a<\/span><\/p>\n<p>SOCKET connectSocket<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u7f51\u7edc\u5957\u63a5\u5b57<\/span><br \/>\nWSADATA wsaData<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521b\u5efa\u4e00\u4e2a\u7ed3\u6784\u4f53\u53d8\u91cf&#xff0c;\u7528\u4e8e\u5b58\u50a8\u5173\u4e8eWinsock\u5e93\u7684\u4fe1\u606f<\/span><\/p>\n<p><span class=\"token keyword\">double<\/span> TEMP <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10.0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">int<\/span> result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">WSAStartup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">MAKEWORD<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>wsaData<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521d\u59cb\u5316Winsock\u5e93&#xff0c;\u6307\u5b9a\u7248\u672c\u53f72.2&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;WSAStartup failed: %d\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p> connectSocket <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">socket<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> SOCK_STREAM<span class=\"token punctuation\">,<\/span> IPPROTO_TCP<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521b\u5efa\u4e00\u4e2aTCP\u5957\u63a5\u5b57&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>connectSocket <span class=\"token operator\">&#061;&#061;<\/span> INVALID_SOCKET<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;socket failed with error: %d&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n<span class=\"token function\">WSACleanup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6e05\u9664Winsock\u5e93<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>sockaddr_in service<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u521b\u5efa\u4e00\u4e2a\u7ed3\u6784\u4f53\u53d8\u91cf&#xff0c;\u7528\u4e8e\u5b58\u50a8\u670d\u52a1\u5668\u5730\u5740\u4fe1\u606f<\/span><br \/>\nservice<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6307\u5b9a\u5730\u5740\u65cf\u4e3aIPv4<\/span><br \/>\n<span class=\"token function\">inet_pton<\/span><span class=\"token punctuation\">(<\/span>AF_INET<span class=\"token punctuation\">,<\/span> SERVER_IP<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>service<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5c06\u5b57\u7b26\u4e32\u7c7b\u578b\u7684IP\u5730\u5740\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u7f51\u7edc\u5b57\u8282\u5e8f\u7684IP\u5730\u5740&#xff0c;\u5e76\u5b58\u50a8\u5728\u7ed3\u6784\u4f53\u4e2d<\/span><br \/>\nservice<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span>SERVER_PORT<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5c06\u7aef\u53e3\u53f7\u4ece\u4e3b\u673a\u5b57\u8282\u5e8f\u8f6c\u6362\u4e3a\u7f51\u7edc\u5b57\u8282\u5e8f&#xff0c;\u5e76\u5b58\u50a8\u5728\u7ed3\u6784\u4f53\u4e2d<\/span><\/p>\n<p>result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>SOCKADDR<span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>service<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>service<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u5230\u670d\u52a1\u5668&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">&#061;&#061;<\/span> SOCKET_ERROR<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;connect failed with error: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n<span class=\"token function\">closesocket<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5173\u95ed\u5957\u63a5\u5b57<\/span><br \/>\n<span class=\"token function\">WSACleanup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6e05\u9664Winsock\u5e93<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Connected to server.&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8fde\u63a5\u6210\u529f&#xff0c;\u8f93\u51fa\u6d88\u606f<\/span><\/p>\n<p><span class=\"token function\">MQTT_Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/*\u767b\u5f55\u670d\u52a1\u5668*\/<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">MQTT_Connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>ClientID<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>Username<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>Password<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5ef6\u65f61000\u6beb\u79d2&#xff0c;\u53731\u79d2<\/span><br \/>\n<span class=\"token function\">Sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;MQTT\u670d\u52a1\u5668\u767b\u5f55\u6821\u9a8c\u4e2d&#8230;.\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8fde\u63a5\u6210\u529f_666\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/\u8ba2\u9605\u7269\u8054\u7f51\u5e73\u53f0\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">int<\/span> stat <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">MQTT_SubscribeTopic<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>SET_TOPIC<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>stat<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8ba2\u9605\u5931\u8d25\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">closesocket<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5173\u95ed\u5957\u63a5\u5b57<\/span><br \/>\n<span class=\"token function\">WSACleanup<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u6e05\u9664Winsock\u5e93<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8ba2\u9605\u6210\u529f\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/*\u521b\u5efa\u7ebf\u7a0b*\/<\/span><\/p>\n<p><span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">sprintf<\/span><span class=\"token punctuation\">(<\/span>mqtt_message<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;{\\\\&#034;services\\\\&#034;: [{\\\\&#034;service_id\\\\&#034;: \\\\&#034;stm32\\\\&#034;,\\\\&#034;properties\\\\&#034;:{\\\\&#034;TEMP\\\\&#034;:%.1f}}]}&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span>TEMP<span class=\"token operator\">&#043;&#061;<\/span><span class=\"token number\">0.2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6e29\u5ea6<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u53d1\u5e03\u4e3b\u9898<\/span><br \/>\n<span class=\"token function\">MQTT_PublishData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>POST_TOPIC<span class=\"token punctuation\">,<\/span> mqtt_message<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u53d1\u5e03\u6d88\u606f\u6210\u529f\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">Sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/*\u53d1\u9001\u6570\u636e\u5230\u670d\u52a1\u5668*\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">Client_SendData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> buff<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> len<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">int<\/span> result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>buff<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u5411\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">&#061;&#061;<\/span> SOCKET_ERROR<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;send failed with error: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/*\u83b7\u53d6\u670d\u52a1\u5668\u4e0b\u53d1\u6570\u636e*\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">Client_GetData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> buff<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">int<\/span> result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>buff<span class=\"token punctuation\">,<\/span><span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u4ece\u670d\u52a1\u5668\u63a5\u6536\u6570\u636e&#xff0c;\u68c0\u67e5\u8fd4\u56de\u503c<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">&#061;&#061;<\/span> SOCKET_ERROR<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;recv failed with error: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">return<\/span> result<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>7.2 \u4ee3\u7801\u91cc\u6838\u5fc3\u7684\u5730\u65b9<\/h3>\n<p>\u8fd9\u91cc\u586b\u5199MQTT\u670d\u52a1\u5668\u7684\u4fe1\u606f&#xff0c;\u4e5f\u5c31\u662f\u524d\u9762\u521b\u5efa\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668\u5f97\u5230\u7684\u4fe1\u606f\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19gdprl1ok1cz.png\" alt=\"image-20231201160441966\" \/><\/p>\n<p>\u8fd9\u91cc\u662f\u4e3b\u51fd\u6570&#xff0c;\u767b\u5f55\u670d\u52a1\u5668\u540e\u8ba2\u9605\u4e3b\u9898&#xff0c;\u53d1\u5e03\u6d88\u606f\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-195vplvlj035p.png\" alt=\"image-20231201160547892\" \/><\/p>\n<h3>7.3 \u7f16\u8bd1\u8fd0\u884c\u4ee3\u7801<\/h3>\n<p>\u6309\u4e0bCtrl&#043;F5 \u8fd0\u884c\u4ee3\u7801\u3002 \u5f39\u51fa\u63a7\u5236\u53f0\u7a97\u53e3\u4e4b\u540e&#xff0c;\u53ef\u4ee5\u770b\u5230&#xff0c;\u6211\u4eec\u5df2\u7ecf\u8fde\u63a5\u4e86\u534e\u4e3a\u4e91MQTT\u670d\u52a1\u5668&#xff0c;\u5e76\u4e14\u5b8c\u6210\u6570\u636e\u4e0a\u4f20\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19ty2r03tttsi.png\" alt=\"image-20231201160621635\" \/><\/p>\n<h3>7.4 \u767b\u5f55\u534e\u4e3a\u4e91IOT\u4e91\u7aef\u67e5\u770b\u6570\u636e<\/h3>\n<p>\u53ef\u4ee5\u770b\u5230\u8bbe\u5907\u5df2\u7ecf\u5728\u7ebf\u4e86\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19evmdhicpprf.png\" alt=\"image-20231201160759752\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\u6211\u4eec\u7684\u6d88\u606f\u4e5f\u5728\u5b9e\u65f6\u7684\u4e0a\u4f20\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19i1q045ma15c.png\" alt=\"image-20231201160823360\" \/><\/p>\n<p>\u5230\u6b64&#xff0c;\u8bf4\u660e\u6211\u4eec\u7684MQTT\u534f\u8bae\u5df2\u7ecf\u5c01\u88c5\u5b8c\u6210&#xff0c;\u53ef\u4ee5\u6b63\u5e38\u7684\u8fd0\u884c\u4e86\u3002<\/p>\n<h2>\u516b\u3001\u4e0b\u53d1\u547d\u4ee4\u7684\u5904\u7406<\/h2>\n<p>\u4e00\u822cMQTT\u8bbe\u5907\u7aef\u9664\u4e86\u4e0a\u4f20\u6570\u636e\u4ee5\u5916&#xff0c;\u8fd8\u9700\u8981\u63a5\u6536MQTT\u670d\u52a1\u5668\u4e0b\u53d1\u7684\u63a7\u5236\u547d\u4ee4\u3002<\/p>\n<p>\u90a3\u4e48\u6211\u4eec\u63a5\u4e0b\u6765\u5c31\u5b8c\u5584\u4e00\u4e0b\u4ee3\u7801&#xff0c;\u63a5\u6536\u534e\u4e3a\u4e91MQTT\u670d\u52a1\u5668\u4e0b\u53d1\u7684\u547d\u4ee4&#xff0c;\u5e76\u8fdb\u884c\u56de\u5e94\u3002<\/p>\n<h3>8.1 \u6dfb\u52a0\u547d\u4ee4<\/h3>\n<p>\u8981\u6d4b\u8bd5\u547d\u4ee4\u4e0b\u53d1&#xff0c;\u90a3\u4e48\u9996\u5148\u9700\u8981\u518d\u534e\u4e3a\u4e91IOT\u5e73\u53f0\u6dfb\u52a0\u547d\u4ee4\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19l0w4zyv4gr4.png\" alt=\"image-20231202180926999\" \/><\/p>\n<p>\u6dfb\u52a0\u4e00\u4e2a\u63a7\u5236\u547d\u4ee4\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19spomxcvmw2k.png\" alt=\"image-20231202181202901\" \/><\/p>\n<p><img decoding=\"async\" src=\"2025-04-19du4km4wmjot.png\" alt=\"image-20231202181233447\" \/><\/p>\n<p>\u547d\u4ee4\u6dfb\u52a0\u5b8c\u6210&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19kio4hsvgm1b.png\" alt=\"image-20231202181248551\" \/><\/p>\n<h3>8.2 \u4e0b\u53d1\u547d\u4ee4\u6d4b\u8bd5<\/h3>\n<p>\u6ce8\u610f&#xff1a;\u4e0b\u53d1\u547d\u4ee4\u662f\u540c\u6b65\u7684&#xff0c;\u8bbe\u5907\u7aef\u5fc5\u987b\u5728\u7ebf\u624d\u53ef\u4ee5\u4e0b\u53d1\u547d\u4ee4\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19hsu2cr4actb.png\" alt=\"image-20231202182312070\" \/><\/p>\n<p>\u8fd9\u4e2a\u4e0b\u53d1\u7684\u547d\u4ee4\u662f\u6709\u53cd\u9988\u3002\u8bbe\u5907\u7aef\u6536\u5230\u4e4b\u540e&#xff0c;\u53ef\u4ee5\u5411\u670d\u52a1\u5668\u53cd\u9988\u72b6\u6001&#xff0c;\u8fd9\u6837\u670d\u52a1\u5668\u624d\u80fd\u77e5\u9053\u521a\u624d\u7684\u63a7\u5236\u547d\u4ee4\u786e\u5b9e\u53d1\u9001\u6210\u529f\u4e86\u3002<\/p>\n<p>\u8bbe\u5907\u6536\u5230\u4fe1\u606f\u4e4b\u540e&#xff0c;\u4e0a\u4f20\u56de\u5e94\u7ed9\u670d\u52a1\u5668\u7684\u4e3b\u9898\u548c\u5185\u5bb9\u683c\u5f0f&#xff1a;<\/p>\n<p>Topic&#xff1a;$oc<span class=\"token operator\">\/<\/span>devices<span class=\"token operator\">\/<\/span><span class=\"token punctuation\">{<\/span>device_id<span class=\"token punctuation\">}<\/span><span class=\"token operator\">\/<\/span>sys<span class=\"token operator\">\/<\/span>commands<span class=\"token operator\">\/<\/span>response<span class=\"token operator\">\/<\/span>request_id<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span>request_id<span class=\"token punctuation\">}<\/span><br \/>\n\u6570\u636e\u683c\u5f0f&#xff1a;<br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token string\">&#034;result_code&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string\">&#034;response_name&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;COMMAND_RESPONSE&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string\">&#034;paras&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;result&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;success&#034;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4e91\u7aef\u53d1\u9001\u63a7\u5236\u547d\u4ee4\u4e4b\u540e&#xff0c;\u8bbe\u5907\u6536\u5230\u7684\u6d88\u606f\u5982\u4e0b&#xff1a;<\/p>\n<p>$oc<span class=\"token operator\">\/<\/span>devices<span class=\"token operator\">\/<\/span><span class=\"token number\">65697<\/span>df3585c81787ad4da82_stm32<span class=\"token operator\">\/<\/span>sys<span class=\"token operator\">\/<\/span>commands<span class=\"token operator\">\/<\/span>request_id<span class=\"token operator\">&#061;<\/span>d49f0bb9<span class=\"token operator\">&#8211;<\/span>ba87<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">4<\/span>c9b<span class=\"token operator\">&#8211;<\/span>b915<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">98<\/span>a1f0fcf689<span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;paras&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;lock&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;service_id&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token string\">&#034;lock&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;command_name&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token string\">&#034;\u9501\u5f00\u5173\u63a7\u5236&#034;<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5176\u4e2drequest_id&#061;d49f0bb9-ba87-4c9b-b915-98a1f0fcf689 \u5c31\u662f\u672c\u6b21\u7684\u8bf7\u6c42ID\u3002\u56de\u5e94\u7684\u65f6\u5019\u9700\u8981\u52a0\u4e0a\u8bf7\u6c42ID\u3002\u670d\u52a1\u5668\u624d\u597d\u5bf9\u5e94\u3002<\/p>\n<p>\u4ee5\u5f53\u524d\u8bbe\u5907\u4e3a\u4f8b&#xff1a;<\/p>\n<p>\u53d1\u5e03\u7684\u4e3b\u9898\u8fd9\u6837\u586b&#xff1a; $oc<span class=\"token operator\">\/<\/span>devices<span class=\"token operator\">\/<\/span><span class=\"token number\">65113<\/span>d05a559fd7cd41435f8_lock1<span class=\"token operator\">\/<\/span>sys<span class=\"token operator\">\/<\/span>commands<span class=\"token operator\">\/<\/span>response<span class=\"token operator\">\/<\/span>request_id<span class=\"token operator\">&#061;<\/span>ce49181e<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">7636<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">4<\/span>b24<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">946<\/span>d<span class=\"token operator\">&#8211;<\/span>c034ca083c1c<\/p>\n<p>\u53d1\u5e03\u7684\u5185\u5bb9\u8fd9\u6837\u586b&#xff1a;<br \/>\n<span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;result_code&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;response_name&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token string\">&#034;COMMAND_RESPONSE&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;paras&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;result&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token string\">&#034;success&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<h3>8.3 \u7f16\u5199\u4ee3\u7801<\/h3>\n<p>\u4e3a\u4e86\u80fd\u591f\u5b9e\u65f6\u63a5\u6536\u670d\u52a1\u5668\u7684\u4ee3\u7801&#xff0c;\u6211\u4eec\u5355\u72ec\u589e\u52a0\u4e00\u4e2a\u7ebf\u7a0b\u6765\u63a5\u6536\u670d\u52a1\u5668\u7684\u6d88\u606f\u3002<\/p>\n<p>\u5728\u4e3b\u51fd\u6570\u91ccMQTT\u670d\u52a1\u5668\u8fde\u63a5\u6210\u529f\u4e4b\u540e&#xff0c;\u589e\u52a0\u4ee5\u4e0b\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/*\u521b\u5efa\u7ebf\u7a0b*\/<\/span><br \/>\nHANDLE hThread <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">CreateThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>LPTHREAD_START_ROUTINE<span class=\"token punctuation\">)<\/span>ReceiveData<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>hThread <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;CreateThread failed.\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u7f16\u5199\u7ebf\u7a0b\u7684\u5de5\u4f5c\u51fd\u6570&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u5904\u7406\u670d\u52a1\u5668\u4e0b\u53d1\u7684\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">ReceiveData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/\/ \u63a5\u6536\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">char<\/span> request_id<span class=\"token punctuation\">[<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">char<\/span> send_cmd<span class=\"token punctuation\">[<\/span><span class=\"token number\">500<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> recvSize<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/\/\u7b49\u5f85\u670d\u52a1\u5668\u4e0b\u53d1\u6d88\u606f<\/span><br \/>\nrecvSize <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>connectSocket<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1024<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>recvSize <span class=\"token operator\">&#061;&#061;<\/span> SOCKET_ERROR<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u7f51\u7edc\u65ad\u5f00\u8fde\u63a5: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">WSAGetLastError<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f<\/span><br \/>\n<span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>recvSize <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u670d\u52a1\u5668\u4e0b\u53d1\u6d88\u606f:\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/\u63a5\u6536\u4e0b\u53d1\u7684\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> recvSize<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%c&#034;<\/span><span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u4e0b\u53d1\u6307\u4ee4\u8bf7\u6c42\u56de\u5e94\u7ed9\u670d\u52a1\u5668(\u547d\u4ee4\u4e0b\u53d1)<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">strstr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;sys\/commands\/request_id&#061;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span> p <span class=\"token operator\">&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span><br \/>\np <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">strstr<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;request_id&#061;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/\/\u89e3\u6790\u6570\u636e<\/span><br \/>\n<span class=\"token comment\">\/\/$oc\/devices\/65697df3585c81787ad4da82_stm32\/sys\/commands\/request_id&#061;6e925cc1-4a8d-4eab-8d85-6c7f15d72189<\/span><br \/>\n<span class=\"token function\">strncpy<\/span><span class=\"token punctuation\">(<\/span>request_id<span class=\"token punctuation\">,<\/span> p<span class=\"token punctuation\">,<\/span> <span class=\"token number\">47<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u4e0a\u62a5\u6570\u636e<\/span><br \/>\n<span class=\"token function\">sprintf<\/span><span class=\"token punctuation\">(<\/span>mqtt_message<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;{\\\\&#034;result_code\\\\&#034;:0,\\\\&#034;response_name\\\\&#034;:\\\\&#034;COMMAND_RESPONSE\\\\&#034;,\\\\&#034;paras\\\\&#034;:{\\\\&#034;result\\\\&#034;:\\\\&#034;success\\\\&#034;}}&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">sprintf<\/span><span class=\"token punctuation\">(<\/span>send_cmd<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;$oc\/devices\/65697df3585c81787ad4da82_stm32\/sys\/commands\/response\/%s&#034;<\/span><span class=\"token punctuation\">,<\/span> request_id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">MQTT_PublishData<\/span><span class=\"token punctuation\">(<\/span>send_cmd<span class=\"token punctuation\">,<\/span> mqtt_message<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;(\u547d\u4ee4)\u53d1\u5e03\u4e3b\u9898:%s\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> send_cmd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;(\u547d\u4ee4)\u53d1\u5e03\u6570\u636e:%s\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> mqtt_message<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>8.4 \u8fd0\u884c\u4ee3\u7801\u6d4b\u8bd5<\/h3>\n<p>\u5148\u8fd0\u884c\u5ba2\u6237\u7aef\u7684\u4ee3\u7801&#xff0c;\u767b\u5f55MQTT\u670d\u52a1\u5668\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19brmk4cawoyy.png\" alt=\"image-20231202182720027\" \/><\/p>\n<p>\u7136\u540e&#xff0c;\u5728\u534e\u4e3a\u4e91IOT\u5e73\u53f0\u4e0b\u53d1\u547d\u4ee4\u3002 \u5982\u679c\u70b9\u51fb\u4e0b\u53d1\u4e4b\u540e&#xff0c;\u53f3\u4e0a\u89d2\u5f39\u51fa\u4e86 \u547d\u4ee4\u4e0b\u53d1\u6210\u529f&#xff0c;\u5c31\u8868\u793a\u6211\u4eec\u5ba2\u6237\u7aef\u4ee3\u7801\u5199OK\u4e86\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19axlj2xaomn2.png\" alt=\"image-20231202182758488\" \/><\/p>\n<p>\u6211\u4eec\u770b\u8bbe\u5907\u7aef\u6536\u5230\u7684\u6d88\u606f&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19w5zhtcjhbml.png\" alt=\"image-20231202182913279\" \/><\/p>\n<h2>\u4e5d\u3001\u603b\u7ed3<\/h2>\n<p>\u5230\u6b64&#xff0c;\u6211\u4eec\u7684MQTT\u534f\u8bae\u5df2\u7ecf\u5f00\u53d1\u5b8c\u6210\u4e86\u3002\u5982\u679c\u5927\u5bb6\u8be6\u7ec6\u9605\u8bfb\u4e86\u6587\u7ae0&#xff0c;\u5e76\u4e14\u8ddf\u7740\u6b65\u9aa4\u64cd\u4f5c\u4e86\u4e00\u6b21&#xff0c;\u76f8\u4fe1\u4f60\u6b64\u523b\u5bf9MQTT\u534f\u8bae\u5e94\u8be5\u6709\u6240\u8ba4\u8bc6\u4e86\u3002\u6211\u662fDS\u5c0f\u9f99\u54e5&#xff0c;\u6b22\u8fce\u5173\u6ce8\u6211&#xff0c;\u540e\u7eed\u4f1a\u6709\u66f4\u591a\u7684\u6280\u672f\u6587\u7ae0\u3001\u9879\u76ee\u6587\u7ae0\u53d1\u5e03\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-04-19pj20j4goiil.png\" alt=\"image-20231202183108654\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb4.5w\u6b21\uff0c\u70b9\u8d5e251\u6b21\uff0c\u6536\u85cf1k\u6b21\u3002\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u57fa\u4e8eC\u8bed\u8a00\u5b9e\u73b0MQTT\u534f\u8bae\u8fde\u63a5\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668\u7684\u5168\u8fc7\u7a0b\uff0c\u4ece\u642d\u5efa\u5f00\u53d1\u73af\u5883\u3001\u7406\u89e3TCP\u548cUDP\u534f\u8bae\u5230\u5c01\u88c5MQTT\u534f\u8bae\u62a5\u6587\uff0c\u4ee5\u53ca\u521b\u5efa\u4ea7\u54c1\u548c\u8bbe\u5907\u3001\u6570\u636e\u4e0a\u4e91\u3002\u901a\u8fc7\u5b9e\u4f8b\u4ee3\u7801\uff0c\u8bfb\u8005\u53ef\u4ee5\u5b66\u4e60\u5982\u4f55\u5728Windows\u4e0b\u4f7f\u7528\u7f51\u7edc\u7f16\u7a0bAPI\uff0c\u5e76\u5b9e\u73b0\u4e0e\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668\u7684\u901a\u4fe1\uff0c\u5b8c\u6210\u6570\u636e\u4e0a\u4f20\u548c\u547d\u4ee4\u54cd\u5e94\u3002<\/p>\n","protected":false},"author":2,"featured_media":18908,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[174,1447,1446,43],"topic":[],"class_list":["post-18928","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-1447","tag-1446","tag-43"],"yoast_head":"<!-- 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content=\"\u57fa\u4e8eC\u8bed\u8a00\u4ece0\u5f00\u59cb\u624b\u64b8MQTT\u534f\u8bae\u4ee3\u7801\u8fde\u63a5\u6807\u51c6\u7684MQTT\u670d\u52a1\u5668\uff0c\u5b8c\u6210\u6570\u636e\u4e0a\u4f20\u548c\u547d\u4ee4\u4e0b\u53d1\u54cd\u5e94(\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668) - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb4.5w\u6b21\uff0c\u70b9\u8d5e251\u6b21\uff0c\u6536\u85cf1k\u6b21\u3002\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u57fa\u4e8eC\u8bed\u8a00\u5b9e\u73b0MQTT\u534f\u8bae\u8fde\u63a5\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668\u7684\u5168\u8fc7\u7a0b\uff0c\u4ece\u642d\u5efa\u5f00\u53d1\u73af\u5883\u3001\u7406\u89e3TCP\u548cUDP\u534f\u8bae\u5230\u5c01\u88c5MQTT\u534f\u8bae\u62a5\u6587\uff0c\u4ee5\u53ca\u521b\u5efa\u4ea7\u54c1\u548c\u8bbe\u5907\u3001\u6570\u636e\u4e0a\u4e91\u3002\u901a\u8fc7\u5b9e\u4f8b\u4ee3\u7801\uff0c\u8bfb\u8005\u53ef\u4ee5\u5b66\u4e60\u5982\u4f55\u5728Windows\u4e0b\u4f7f\u7528\u7f51\u7edc\u7f16\u7a0bAPI\uff0c\u5e76\u5b9e\u73b0\u4e0e\u534e\u4e3a\u4e91IOT\u670d\u52a1\u5668\u7684\u901a\u4fe1\uff0c\u5b8c\u6210\u6570\u636e\u4e0a\u4f20\u548c\u547d\u4ee4\u54cd\u5e94\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/18928.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-18T17:18:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418171813-680289552db35.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"25 \u5206\" \/>\n<script type=\"application\/ld+json\" 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