{"id":78371,"date":"2026-02-27T10:34:20","date_gmt":"2026-02-27T02:34:20","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/78371.html"},"modified":"2026-02-27T10:34:20","modified_gmt":"2026-02-27T02:34:20","slug":"esp32-%e4%bd%bf%e7%94%a8esp-idf-%e8%bf%9e%e6%8e%a5wifi%e5%b9%b6%e5%bb%ba%e7%ab%8btcp%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%88%e6%94%af%e6%8c%81%e5%a4%9a%e8%bf%9e%e6%8e%a5%ef%bc%89%e9%80%9a%e4%bf%a1","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/78371.html","title":{"rendered":"ESP32 \u4f7f\u7528ESP-IDF \u8fde\u63a5WiFi\u5e76\u5efa\u7acbTCP\u670d\u52a1\u5668\uff08\u652f\u6301\u591a\u8fde\u63a5\uff09\u901a\u4fe1\u6e90\u7801\u5206\u4eab"},"content":{"rendered":"<\/p>\n<h4>ESP32 \u4f7f\u7528ESP-IDF \u8fde\u63a5WiFi\u5e76\u5efa\u7acbTCP\u670d\u52a1\u5668&#xff08;\u652f\u6301\u591a\u8fde\u63a5&#xff09;\u901a\u4fe1\u6e90\u7801\u5206\u4eab<\/h4>\n<ul>\n<li>\u4e00\u3001\u6e90\u7801\u5206\u4eab<\/li>\n<li>\n<ul>\n<li>1\u3001\u6548\u679c\u5c55\u793a<\/li>\n<li>2\u3001\u5f00\u53d1\u73af\u5883\u642d\u5efa<\/li>\n<li>3\u3001\u6e90\u7801\u5206\u4eab<\/li>\n<\/ul>\n<\/li>\n<li>\u4e8c\u3001select\u5173\u952e\u5b57\u8be6\u89e3<\/li>\n<li>\n<ul>\n<li>1\u3001 \u6838\u5fc3\u539f\u7406<\/li>\n<li>2\u3001\u51fd\u6570\u539f\u578b<\/li>\n<li>3\u3001\u5173\u952e\u64cd\u4f5c\u5b8f<\/li>\n<li>4\u3001 \u4f7f\u7528\u6b65\u9aa4<\/li>\n<li>5\u3001\u793a\u4f8b\u4ee3\u7801<\/li>\n<li>6\u3001\u4f18\u70b9\u4e0e\u5c40\u9650\u6027<\/li>\n<li>7\u3001\u603b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001ESP-IDF\u8be6\u89e3<\/li>\n<li>\n<ul>\n<li>1\u3001ESP32 \u6982\u8ff0<\/li>\n<li>2\u3001 ESP-IDF \u8be6\u89e3<\/li>\n<li>\n<ul>\n<li>2.1 \u3001ESP-IDF \u7684\u6838\u5fc3\u7ec4\u4ef6\u4e0e\u67b6\u6784<\/li>\n<li>2.2 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directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;freertos\/event_groups.h&#034;<\/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\">&#034;esp_system.h&#034;<\/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\">&#034;esp_wifi.h&#034;<\/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\">&#034;esp_event.h&#034;<\/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\">&#034;esp_log.h&#034;<\/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\">&#034;nvs_flash.h&#034;<\/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\">&#034;lwip\/err.h&#034;<\/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\">&#034;lwip\/sys.h&#034;<\/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\">&#034;esp_netif.h&#034;<\/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;netinet\/in.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;arpa\/inet.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;unistd.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;fcntl.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;errno.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\">&#034;lwip\/err.h&#034;<\/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\">&#034;lwip\/sys.h&#034;<\/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\">&#034;lwip\/err.h&#034;<\/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\">&#034;lwip\/sockets.h&#034;<\/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\">&#034;lwip\/sys.h&#034;<\/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\">&#034;lwip\/netdb.h&#034;<\/span><\/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\">EXAMPLE_ESP_WIFI_SSID<\/span>      <span class=\"token string\">&#034;VIP&#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\">EXAMPLE_ESP_WIFI_PASS<\/span>      <span class=\"token string\">&#034;nimingzi&#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\">EXAMPLE_ESP_MAXIMUM_RETRY<\/span>  <span class=\"token expression\"><span class=\"token number\">5<\/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\">PORT<\/span> <span class=\"token expression\"><span class=\"token number\">8080<\/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\">MAX_CLIENTS<\/span> <span class=\"token expression\"><span class=\"token number\">10<\/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\">BUFFER_SIZE<\/span> <span class=\"token expression\"><span class=\"token number\">1024<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">CONFIG_ESP_STATION_EXAMPLE_WPA3_SAE_PWE_HUNT_AND_PECK<\/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\">ESP_WIFI_SAE_MODE<\/span> <span class=\"token expression\">WPA3_SAE_PWE_HUNT_AND_PECK<\/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\">EXAMPLE_H2E_IDENTIFIER<\/span> <span class=\"token string\">&#034;&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_STATION_EXAMPLE_WPA3_SAE_PWE_HASH_TO_ELEMENT<\/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\">ESP_WIFI_SAE_MODE<\/span> <span class=\"token expression\">WPA3_SAE_PWE_HASH_TO_ELEMENT<\/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\">EXAMPLE_H2E_IDENTIFIER<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_PW_ID<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_STATION_EXAMPLE_WPA3_SAE_PWE_BOTH<\/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\">ESP_WIFI_SAE_MODE<\/span> <span class=\"token expression\">WPA3_SAE_PWE_BOTH<\/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\">EXAMPLE_H2E_IDENTIFIER<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_PW_ID<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_AUTH_OPEN<\/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\">ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<\/span> <span class=\"token expression\">WIFI_AUTH_OPEN<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_AUTH_WEP<\/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\">ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<\/span> <span class=\"token expression\">WIFI_AUTH_WEP<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_AUTH_WPA_PSK<\/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\">ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<\/span> <span class=\"token expression\">WIFI_AUTH_WPA_PSK<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_AUTH_WPA2_PSK<\/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\">ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<\/span> <span class=\"token expression\">WIFI_AUTH_WPA2_PSK<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_AUTH_WPA_WPA2_PSK<\/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\">ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<\/span> <span class=\"token expression\">WIFI_AUTH_WPA_WPA2_PSK<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_AUTH_WPA3_PSK<\/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\">ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<\/span> <span class=\"token expression\">WIFI_AUTH_WPA3_PSK<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_AUTH_WPA2_WPA3_PSK<\/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\">ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<\/span> <span class=\"token expression\">WIFI_AUTH_WPA2_WPA3_PSK<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">elif<\/span> <span class=\"token expression\">CONFIG_ESP_WIFI_AUTH_WAPI_PSK<\/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\">ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<\/span> <span class=\"token expression\">WIFI_AUTH_WAPI_PSK<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> EventGroupHandle_t s_wifi_event_group<span class=\"token punctuation\">;<\/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\">WIFI_CONNECTED_BIT<\/span> <span class=\"token expression\">BIT0<\/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\">WIFI_FAIL_BIT<\/span>      <span class=\"token expression\">BIT1<\/span><\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>TAG <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;wifi station&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> s_retry_num <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">event_handler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span> arg<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">esp_event_base_t<\/span> event_base<span class=\"token punctuation\">,<\/span><br \/>\n                                <span class=\"token class-name\">int32_t<\/span> event_id<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">void<\/span><span class=\"token operator\">*<\/span> event_data<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>event_base <span class=\"token operator\">&#061;&#061;<\/span> WIFI_EVENT <span class=\"token operator\">&amp;&amp;<\/span> event_id <span class=\"token operator\">&#061;&#061;<\/span> WIFI_EVENT_STA_START<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">esp_wifi_connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>event_base <span class=\"token operator\">&#061;&#061;<\/span> WIFI_EVENT <span class=\"token operator\">&amp;&amp;<\/span> event_id <span class=\"token operator\">&#061;&#061;<\/span> WIFI_EVENT_STA_DISCONNECTED<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>s_retry_num <span class=\"token operator\">&lt;<\/span> EXAMPLE_ESP_MAXIMUM_RETRY<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">esp_wifi_connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            s_retry_num<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;retry to connect to the AP&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">xEventGroupSetBits<\/span><span class=\"token punctuation\">(<\/span>s_wifi_event_group<span class=\"token punctuation\">,<\/span> WIFI_FAIL_BIT<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;connect to the AP fail&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>event_base <span class=\"token operator\">&#061;&#061;<\/span> IP_EVENT <span class=\"token operator\">&amp;&amp;<\/span> event_id <span class=\"token operator\">&#061;&#061;<\/span> IP_EVENT_STA_GOT_IP<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">ip_event_got_ip_t<\/span><span class=\"token operator\">*<\/span> event <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ip_event_got_ip_t<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> event_data<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;got ip:&#034;<\/span> IPSTR<span class=\"token punctuation\">,<\/span> <span class=\"token function\">IP2STR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>event<span class=\"token operator\">-&gt;<\/span>ip_info<span class=\"token punctuation\">.<\/span>ip<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        s_retry_num <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">xEventGroupSetBits<\/span><span class=\"token punctuation\">(<\/span>s_wifi_event_group<span class=\"token punctuation\">,<\/span> WIFI_CONNECTED_BIT<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 keyword\">void<\/span> <span class=\"token function\">wifi_init_sta<\/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    s_wifi_event_group <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">xEventGroupCreate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">esp_netif_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">esp_event_loop_create_default<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">esp_netif_create_default_wifi_sta<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">wifi_init_config_t<\/span> cfg <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">WIFI_INIT_CONFIG_DEFAULT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">esp_wifi_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>cfg<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">esp_event_handler_instance_t<\/span> instance_any_id<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">esp_event_handler_instance_t<\/span> instance_got_ip<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">esp_event_handler_instance_register<\/span><span class=\"token punctuation\">(<\/span>WIFI_EVENT<span class=\"token punctuation\">,<\/span><br \/>\n                                                        ESP_EVENT_ANY_ID<span class=\"token punctuation\">,<\/span><br \/>\n                                                        <span class=\"token operator\">&amp;<\/span>event_handler<span class=\"token punctuation\">,<\/span><br \/>\n                                                        <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                                        <span class=\"token operator\">&amp;<\/span>instance_any_id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">esp_event_handler_instance_register<\/span><span class=\"token punctuation\">(<\/span>IP_EVENT<span class=\"token punctuation\">,<\/span><br \/>\n                                                        IP_EVENT_STA_GOT_IP<span class=\"token punctuation\">,<\/span><br \/>\n                                                        <span class=\"token operator\">&amp;<\/span>event_handler<span class=\"token punctuation\">,<\/span><br \/>\n                                                        <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                                        <span class=\"token operator\">&amp;<\/span>instance_got_ip<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">wifi_config_t<\/span> wifi_config <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span>sta <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span>ssid <span class=\"token operator\">&#061;<\/span> EXAMPLE_ESP_WIFI_SSID<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span>password <span class=\"token operator\">&#061;<\/span> EXAMPLE_ESP_WIFI_PASS<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span>threshold<span class=\"token punctuation\">.<\/span>authmode <span class=\"token operator\">&#061;<\/span> ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span>sae_pwe_h2e <span class=\"token operator\">&#061;<\/span> ESP_WIFI_SAE_MODE<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span>sae_h2e_identifier <span class=\"token operator\">&#061;<\/span> EXAMPLE_H2E_IDENTIFIER<span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">esp_wifi_set_mode<\/span><span class=\"token punctuation\">(<\/span>WIFI_MODE_STA<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">esp_wifi_set_config<\/span><span class=\"token punctuation\">(<\/span>WIFI_IF_STA<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>wifi_config<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">esp_wifi_start<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;wifi_init_sta finished.&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    EventBits_t bits <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">xEventGroupWaitBits<\/span><span class=\"token punctuation\">(<\/span>s_wifi_event_group<span class=\"token punctuation\">,<\/span><br \/>\n            WIFI_CONNECTED_BIT <span class=\"token operator\">|<\/span> WIFI_FAIL_BIT<span class=\"token punctuation\">,<\/span><br \/>\n            pdFALSE<span class=\"token punctuation\">,<\/span><br \/>\n            pdFALSE<span class=\"token punctuation\">,<\/span><br \/>\n            portMAX_DELAY<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>bits <span class=\"token operator\">&amp;<\/span> WIFI_CONNECTED_BIT<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;connected to ap SSID:%s password:%s&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                 EXAMPLE_ESP_WIFI_SSID<span class=\"token punctuation\">,<\/span> EXAMPLE_ESP_WIFI_PASS<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>bits <span class=\"token operator\">&amp;<\/span> WIFI_FAIL_BIT<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Failed to connect to SSID:%s, password:%s&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                 EXAMPLE_ESP_WIFI_SSID<span class=\"token punctuation\">,<\/span> EXAMPLE_ESP_WIFI_PASS<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">ESP_LOGE<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;UNEXPECTED EVENT&#034;<\/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 keyword\">void<\/span> <span class=\"token function\">tcp_server_loop<\/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> buffer<span class=\"token punctuation\">[<\/span>BUFFER_SIZE<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> client_socket<span class=\"token punctuation\">[<\/span>MAX_CLIENTS<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/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\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span> serverAddr<span class=\"token punctuation\">,<\/span> clientAddr<span class=\"token punctuation\">;<\/span><br \/>\n    fd_set allFdSet<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> listenFd<span class=\"token punctuation\">;<\/span><br \/>\n    fd_set readSet<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> maxFd<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> nReady<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">socklen_t<\/span> sinSize<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u521b\u5efaTCP\u5957\u63a5\u5b57<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>listenFd <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> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">ESP_LOGE<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Socket creation failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8bbe\u7f6e\u5957\u63a5\u5b57\u9009\u9879<\/span><br \/>\n   <span class=\"token comment\">\/* if (setsockopt(listenFd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &amp;opt, sizeof(opt)))<br \/>\n    {<br \/>\n        ESP_LOGE(TAG, &#034;Setsockopt failed&#034;);<br \/>\n        close(listenFd);<br \/>\n        return;<br \/>\n    }*\/<\/span><\/p>\n<p>    serverAddr<span class=\"token punctuation\">.<\/span>sin_family <span class=\"token operator\">&#061;<\/span> AF_INET<span class=\"token punctuation\">;<\/span><br \/>\n    serverAddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">.<\/span>s_addr <span class=\"token operator\">&#061;<\/span> INADDR_ANY<span class=\"token punctuation\">;<\/span><br \/>\n    serverAddr<span class=\"token punctuation\">.<\/span>sin_port <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">htons<\/span><span class=\"token punctuation\">(<\/span>PORT<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u7ed1\u5b9a\u5730\u5740\u548c\u7aef\u53e3<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span>listenFd<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>serverAddr<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>serverAddr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">ESP_LOGE<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Bind failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>listenFd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">vTaskDelete<\/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 punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u76d1\u542c\u8fde\u63a5<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>listenFd<span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">ESP_LOGE<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Listen failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>listenFd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">vTaskDelete<\/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 punctuation\">}<\/span><\/p>\n<p>    <span class=\"token function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;TCP server listening on port %d&#034;<\/span><span class=\"token punctuation\">,<\/span> PORT<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    maxFd <span class=\"token operator\">&#061;<\/span> listenFd<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">FD_ZERO<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>allFdSet<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">FD_SET<\/span><span class=\"token punctuation\">(<\/span>listenFd<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>allFdSet<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> <span class=\"token punctuation\">{<\/span><br \/>\n        readSet <span class=\"token operator\">&#061;<\/span> allFdSet<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u4f7f\u7528select\u7b49\u5f85\u6d3b\u52a8<\/span><br \/>\n        nReady <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">select<\/span><span class=\"token punctuation\">(<\/span>maxFd <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>readSet<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/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><span class=\"token punctuation\">(<\/span>nReady <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;&amp;<\/span> <span class=\"token punctuation\">(<\/span>errno <span class=\"token operator\">!&#061;<\/span> EINTR<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">ESP_LOGE<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Select error&#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 comment\">\/\/ \u65b0\u8fde\u63a5\u8bf7\u6c42<\/span><br \/>\n        <span class=\"token comment\">\/\/\u67e5\u770b\u662f\u4e0d\u662f\u76d1\u542c\u5957\u63a5\u5b57<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">FD_ISSET<\/span><span class=\"token punctuation\">(<\/span>listenFd<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>readSet<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            sinSize <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr_in<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token comment\">\/* \u63a5\u53d7\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5socket\u7684\u8bf7\u6c42&#xff0c;\u8fd9\u4e2a\u51fd\u6570\u8c03\u7528\u662f\u963b\u585e\u5f0f\u7684 *\/<\/span><br \/>\n            <span class=\"token keyword\">int<\/span> acceptFd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">accept<\/span><span class=\"token punctuation\">(<\/span>listenFd<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&amp;<\/span>clientAddr<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>sinSize<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token comment\">\/* \u8fd4\u56de\u7684\u662f\u8fde\u63a5\u6210\u529f\u7684socket *\/<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>acceptFd <span class=\"token operator\">&lt;<\/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\">ESP_LOGE<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;accept connection failed! errno &#061; %d&#034;<\/span><span class=\"token punctuation\">,<\/span> errno<span class=\"token punctuation\">)<\/span><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 comment\">\/* \u63a5\u53d7\u8fd4\u56de\u7684client_addr\u6307\u5411\u4e86\u5ba2\u6237\u7aef\u7684\u5730\u5740\u4fe1\u606f *\/<\/span><br \/>\n           <span class=\"token function\">ESP_LOGD<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;I get a connection from (%s , %d)&#034;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token function\">inet_ntoa<\/span><span class=\"token punctuation\">(<\/span>clientAddr<span class=\"token punctuation\">.<\/span>sin_addr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">ntohs<\/span><span class=\"token punctuation\">(<\/span>clientAddr<span class=\"token punctuation\">.<\/span>sin_port<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token function\">FD_SET<\/span><span class=\"token punctuation\">(<\/span>acceptFd<span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>allFdSet<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            maxFd <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>acceptFd <span class=\"token operator\">&gt;<\/span> maxFd<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span> acceptFd<span class=\"token operator\">:<\/span>maxFd<span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/ \u6dfb\u52a0\u65b0\u5ba2\u6237\u7aef\u5230\u6570\u7ec4<\/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> MAX_CLIENTS<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>client_socket<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    client_socket<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> acceptFd<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 punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u5904\u7406\u5df2\u8fde\u63a5\u5ba2\u6237\u7aef\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> MAX_CLIENTS<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 keyword\">if<\/span><span class=\"token punctuation\">(<\/span>client_socket<span class=\"token punctuation\">[<\/span>i<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\">continue<\/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><span class=\"token function\">FD_ISSET<\/span><span class=\"token punctuation\">(<\/span>client_socket<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>readSet<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> recLen <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span>client_socket<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<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><br \/>\n                <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>recLen <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 function\">ESP_LOGW<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;connection is closed:(%d)&#034;<\/span><span class=\"token punctuation\">,<\/span>client_socket<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 function\">closesocket<\/span><span class=\"token punctuation\">(<\/span>client_socket<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                    <span class=\"token function\">FD_CLR<\/span><span class=\"token punctuation\">(<\/span>client_socket<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><span class=\"token operator\">&amp;<\/span>allFdSet<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    client_socket<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <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 keyword\">else<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>client_socket<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span>buffer<span class=\"token punctuation\">,<\/span>recLen<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 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<p>    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>listenFd<span class=\"token punctuation\">)<\/span><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\">app_main<\/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 class-name\">esp_err_t<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">nvs_flash_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret <span class=\"token operator\">&#061;&#061;<\/span> ESP_ERR_NVS_NO_FREE_PAGES <span class=\"token operator\">||<\/span> ret <span class=\"token operator\">&#061;&#061;<\/span> ESP_ERR_NVS_NEW_VERSION_FOUND<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n      <span class=\"token function\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">nvs_flash_erase<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">nvs_flash_init<\/span><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\">ESP_ERROR_CHECK<\/span><span class=\"token punctuation\">(<\/span>ret<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>CONFIG_LOG_MAXIMUM_LEVEL <span class=\"token operator\">&gt;<\/span> CONFIG_LOG_DEFAULT_LEVEL<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">esp_log_level_set<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;wifi&#034;<\/span><span class=\"token punctuation\">,<\/span> CONFIG_LOG_MAXIMUM_LEVEL<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;ESP_WIFI_MODE_STA&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">wifi_init_sta<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">vTaskDelay<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3000<\/span><span class=\"token punctuation\">)<\/span><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 function\">tcp_server_loop<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">vTaskDelay<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span> <span class=\"token operator\">\/<\/span> portTICK_PERIOD_MS<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<h2>\u4e8c\u3001select\u5173\u952e\u5b57\u8be6\u89e3<\/h2>\n<p>select() \u662f Unix\/Linux \u7f51\u7edc\u7f16\u7a0b\u4e2d\u7528\u4e8e I\/O \u591a\u8def\u590d\u7528 \u7684\u6838\u5fc3\u51fd\u6570\u3002\u5b83\u5141\u8bb8\u7a0b\u5e8f\u540c\u65f6\u76d1\u63a7\u591a\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff08;\u5982\u5957\u63a5\u5b57&#xff09;&#xff0c;\u5e76\u5728\u5176\u4e2d\u4efb\u610f\u4e00\u4e2a\u6216\u591a\u4e2a\u63cf\u8ff0\u7b26\u5c31\u7eea&#xff08;\u53ef\u8bfb\u3001\u53ef\u5199\u6216\u51fa\u73b0\u5f02\u5e38&#xff09;\u65f6\u901a\u77e5\u7a0b\u5e8f\u3002\u8fd9\u79cd\u673a\u5236\u80fd\u663e\u8457\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5e76\u53d1\u6548\u7387&#xff0c;\u907f\u514d\u963b\u585e\u7b49\u5f85\u5355\u4e2a\u63cf\u8ff0\u7b26\u3002<\/p>\n<h3>1\u3001 \u6838\u5fc3\u539f\u7406<\/h3>\n<p>select() \u7684\u5de5\u4f5c\u539f\u7406\u57fa\u4e8e \u963b\u585e\u7b49\u5f85 \u548c \u63cf\u8ff0\u7b26\u96c6\u5408&#xff1a;<\/p>\n<ul>\n<li>\u963b\u585e\u7b49\u5f85&#xff1a;\u8c03\u7528 select() \u65f6&#xff0c;\u7a0b\u5e8f\u4f1a\u963b\u585e&#xff08;\u6682\u505c\u6267\u884c&#xff09;&#xff0c;\u76f4\u5230\u4ee5\u4e0b\u4efb\u4e00\u60c5\u51b5\u53d1\u751f&#xff1a;\n<ul>\n<li>\u81f3\u5c11\u4e00\u4e2a\u63cf\u8ff0\u7b26\u5c31\u7eea&#xff1b;<\/li>\n<li>\u8d85\u65f6\u65f6\u95f4\u5230\u8fbe&#xff1b;<\/li>\n<li>\u6536\u5230\u4e2d\u65ad\u4fe1\u53f7\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u63cf\u8ff0\u7b26\u96c6\u5408&#xff1a;\u901a\u8fc7 fd_set \u7ed3\u6784\u4f53\u7ba1\u7406\u9700\u8981\u76d1\u63a7\u7684\u63cf\u8ff0\u7b26\u96c6\u5408&#xff0c;\u5305\u62ec&#xff1a;\n<ul>\n<li>readfds&#xff1a;\u76d1\u63a7\u53ef\u8bfb\u4e8b\u4ef6&#xff08;\u5982\u6570\u636e\u5230\u8fbe&#xff09;&#xff1b;<\/li>\n<li>writefds&#xff1a;\u76d1\u63a7\u53ef\u5199\u4e8b\u4ef6&#xff08;\u5982\u7f13\u51b2\u533a\u7a7a\u95f2&#xff09;&#xff1b;<\/li>\n<li>exceptfds&#xff1a;\u76d1\u63a7\u5f02\u5e38\u4e8b\u4ef6&#xff08;\u5982\u5e26\u5916\u6570\u636e&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>2\u3001\u51fd\u6570\u539f\u578b<\/h3>\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;sys\/select.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">select<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> nfds<span class=\"token punctuation\">,<\/span>                  <span class=\"token comment\">\/\/ \u6700\u5927\u63cf\u8ff0\u7b26\u503c &#043; 1<\/span><br \/>\n    fd_set <span class=\"token operator\">*<\/span>readfds<span class=\"token punctuation\">,<\/span>           <span class=\"token comment\">\/\/ \u76d1\u63a7\u53ef\u8bfb\u7684\u96c6\u5408<\/span><br \/>\n    fd_set <span class=\"token operator\">*<\/span>writefds<span class=\"token punctuation\">,<\/span>          <span class=\"token comment\">\/\/ \u76d1\u63a7\u53ef\u5199\u7684\u96c6\u5408<\/span><br \/>\n    fd_set <span class=\"token operator\">*<\/span>exceptfds<span class=\"token punctuation\">,<\/span>         <span class=\"token comment\">\/\/ \u76d1\u63a7\u5f02\u5e38\u7684\u96c6\u5408<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">timeval<\/span> <span class=\"token operator\">*<\/span>timeout    <span class=\"token comment\">\/\/ \u8d85\u65f6\u65f6\u95f4<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<ul>\n<li>\u8fd4\u56de\u503c&#xff1a;\n<ul>\n<li>&gt;0&#xff1a;\u5c31\u7eea\u7684\u63cf\u8ff0\u7b26\u603b\u6570&#xff1b;<\/li>\n<li>0&#xff1a;\u8d85\u65f6&#xff1b;<\/li>\n<li>-1&#xff1a;\u51fa\u9519&#xff08;\u5982 EBADF \u65e0\u6548\u63cf\u8ff0\u7b26&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>3\u3001\u5173\u952e\u64cd\u4f5c\u5b8f<\/h3>\n<ul>\n<li>FD_ZERO(fd_set *set)&#xff1a;\u6e05\u7a7a\u96c6\u5408\u3002<\/li>\n<li>FD_SET(int fd, fd_set *set)&#xff1a;\u5c06\u63cf\u8ff0\u7b26 fd \u52a0\u5165\u96c6\u5408\u3002<\/li>\n<li>FD_CLR(int fd, fd_set *set)&#xff1a;\u5c06\u63cf\u8ff0\u7b26 fd \u79fb\u51fa\u96c6\u5408\u3002<\/li>\n<li>FD_ISSET(int fd, fd_set *set)&#xff1a;\u68c0\u67e5 fd \u662f\u5426\u5728\u96c6\u5408\u4e2d&#xff08;\u5c31\u7eea\u65f6\u8fd4\u56de\u771f&#xff09;\u3002<\/li>\n<\/ul>\n<h3>4\u3001 \u4f7f\u7528\u6b65\u9aa4<\/h3>\n<li>\u521d\u59cb\u5316\u96c6\u5408&#xff1a;fd_set read_fds<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">FD_ZERO<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>read_fds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ \u6e05\u7a7a\u96c6\u5408<\/span><br \/>\n<span class=\"token function\">FD_SET<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>read_fds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u52a0\u5165\u5957\u63a5\u5b57<\/span>\n <\/li>\n<li>\u8bbe\u7f6e\u8d85\u65f6&#xff08;\u53ef\u9009&#xff09;&#xff1a;<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">timeval<\/span> tv <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>tv_sec <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\">\/\/ 5\u79d2<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>tv_usec <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<li>\u8c03\u7528 select()&#xff1a;<span class=\"token keyword\">int<\/span> max_fd <span class=\"token operator\">&#061;<\/span> sockfd <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> ready <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">select<\/span><span class=\"token punctuation\">(<\/span>max_fd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>read_fds<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>tv<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<li>\u68c0\u67e5\u5c31\u7eea\u63cf\u8ff0\u7b26&#xff1a;<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">FD_ISSET<\/span><span class=\"token punctuation\">(<\/span>sockfd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>read_fds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u5904\u7406\u53ef\u8bfb\u4e8b\u4ef6<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<h3>5\u3001\u793a\u4f8b\u4ee3\u7801<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u76d1\u63a7\u6807\u51c6\u8f93\u5165\u548c\u5957\u63a5\u5b57\u7684\u7b80\u5316\u793a\u4f8b&#xff1a;<\/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;sys\/select.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;unistd.h&gt;<\/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> <span class=\"token punctuation\">{<\/span><br \/>\n    fd_set read_fds<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">timeval<\/span> tv<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> max_fd <span class=\"token operator\">&#061;<\/span> STDIN_FILENO <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6807\u51c6\u8f93\u5165\u63cf\u8ff0\u7b26\u4e3a0<\/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> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">FD_ZERO<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>read_fds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">FD_SET<\/span><span class=\"token punctuation\">(<\/span>STDIN_FILENO<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>read_fds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u76d1\u63a7\u6807\u51c6\u8f93\u5165<\/span><\/p>\n<p>        tv<span class=\"token punctuation\">.<\/span>tv_sec <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        tv<span class=\"token punctuation\">.<\/span>tv_usec <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">int<\/span> ready <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">select<\/span><span class=\"token punctuation\">(<\/span>max_fd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>read_fds<span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>tv<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ready <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;select error&#034;<\/span><span class=\"token punctuation\">)<\/span><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> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ready <span class=\"token operator\">&#061;&#061;<\/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;Timeout, no data.\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">FD_ISSET<\/span><span class=\"token punctuation\">(<\/span>STDIN_FILENO<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>read_fds<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">char<\/span> buf<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 function\">fgets<\/span><span class=\"token punctuation\">(<\/span>buf<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buf<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">stdin<\/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;Input: %s&#034;<\/span><span class=\"token punctuation\">,<\/span> buf<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 keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>6\u3001\u4f18\u70b9\u4e0e\u5c40\u9650\u6027<\/h3>\n<ul>\n<li>\u4f18\u70b9&#xff1a;\n<ul>\n<li>\u8de8\u5e73\u53f0\u517c\u5bb9\u6027\u597d&#xff08;Unix\/Linux\/Windows&#xff09;&#xff1b;<\/li>\n<li>\u7b80\u5355\u6613\u7528&#xff0c;\u9002\u5408\u5c11\u91cf\u5e76\u53d1\u8fde\u63a5\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5c40\u9650\u6027&#xff1a;\n<ul>\n<li>\u63cf\u8ff0\u7b26\u6570\u91cf\u9650\u5236&#xff1a;fd_set \u5927\u5c0f\u56fa\u5b9a&#xff08;\u901a\u5e381024&#xff09;&#xff0c;\u9700\u901a\u8fc7\u5b8f FD_SETSIZE \u6269\u5c55&#xff1b;<\/li>\n<li>\u6548\u7387\u95ee\u9898&#xff1a;\u7ebf\u6027\u626b\u63cf\u6240\u6709\u63cf\u8ff0\u7b26&#xff0c;\u9ad8\u5e76\u53d1\u65f6\u6027\u80fd\u4e0b\u964d&#xff1b;<\/li>\n<li>\u5185\u6838\u6001\u5230\u7528\u6237\u6001\u590d\u5236\u5f00\u9500&#xff1a;\u6bcf\u6b21\u8c03\u7528\u9700\u4f20\u9012\u6574\u4e2a\u96c6\u5408\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>7\u3001\u603b\u7ed3<\/h3>\n<p>select() \u662f\u6784\u5efa\u8f7b\u91cf\u7ea7\u5e76\u53d1\u670d\u52a1\u5668\u7684\u6709\u6548\u5de5\u5177&#xff0c;\u5c24\u5176\u9002\u5408\u8fde\u63a5\u6570\u8f83\u5c11\u6216\u517c\u5bb9\u6027\u8981\u6c42\u9ad8\u7684\u573a\u666f\u3002\u5bf9\u4e8e\u9ad8\u5e76\u53d1\u9700\u6c42&#xff0c;\u53ef\u8003\u8651\u66f4\u9ad8\u6548\u7684\u66ff\u4ee3\u65b9\u6848&#xff08;\u5982 epoll \u6216 kqueue&#xff09;&#xff0c;\u4f46 select \u7684\u6838\u5fc3\u601d\u60f3\u4ecd\u662f\u7406\u89e3\u591a\u8def\u590d\u7528\u7684\u57fa\u7840\u3002<\/p>\n<h2>\u4e09\u3001ESP-IDF\u8be6\u89e3<\/h2>\n<h3>1\u3001ESP32 \u6982\u8ff0<\/h3>\n<p>ESP32 \u662f\u7531\u4e50\u946b\u79d1\u6280&#xff08;Espressif Systems&#xff09;\u63a8\u51fa\u7684\u4e00\u6b3e\u9ad8\u6027\u80fd\u3001\u4f4e\u529f\u8017\u3001\u9ad8\u96c6\u6210\u5ea6\u7684 Wi-Fi &amp; \u84dd\u7259\u53cc\u6a21\u7cfb\u7edf\u7ea7\u82af\u7247&#xff08;SoC&#xff09;\u3002\u5b83\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7269\u8054\u7f51&#xff08;IoT&#xff09;\u3001\u667a\u80fd\u5bb6\u5c45\u3001\u5de5\u4e1a\u63a7\u5236\u7b49\u9886\u57df\u3002\u5176\u5173\u952e\u7279\u6027\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u53cc\u6838\u5904\u7406\u5668&#xff08;\u901a\u5e38\u4e3a Xtensa LX6&#xff0c;\u67d0\u4e9b\u578b\u53f7\u4e3a RISC-V&#xff09;<\/li>\n<li>\u96c6\u6210 Wi-Fi (802.11 b\/g\/n) \u548c\u84dd\u7259 (\u5305\u62ec\u7ecf\u5178\u84dd\u7259\u548c\u4f4e\u529f\u8017\u84dd\u7259 BLE)<\/li>\n<li>\u4e30\u5bcc\u7684\u5916\u8bbe\u63a5\u53e3&#xff1a;<span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">\n<p>         S<\/p>\n<p>         P<\/p>\n<p>         I<\/p>\n<p>        SPI<\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">SP<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0785em\">I<\/span><\/span><\/span><\/span><\/span>, <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         I<\/p>\n<p>         2<\/p>\n<p>         C<\/p>\n<p>        I2C<\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0785em\">I<\/span><span class=\"mord\">2<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0715em\">C<\/span><\/span><\/span><\/span><\/span>, <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         I<\/p>\n<p>         2<\/p>\n<p>         S<\/p>\n<p>        I2S<\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0785em\">I<\/span><span class=\"mord\">2<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0576em\">S<\/span><\/span><\/span><\/span><\/span>, <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         U<\/p>\n<p>         A<\/p>\n<p>         R<\/p>\n<p>         T<\/p>\n<p>        UART<\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.109em\">U<\/span><span class=\"mord mathnormal\">A<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">RT<\/span><\/span><\/span><\/span><\/span>, <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         A<\/p>\n<p>         D<\/p>\n<p>         C<\/p>\n<p>        ADC<\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\">A<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0278em\">D<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0715em\">C<\/span><\/span><\/span><\/span><\/span>, <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         D<\/p>\n<p>         A<\/p>\n<p>         C<\/p>\n<p>        DAC<\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0278em\">D<\/span><span class=\"mord mathnormal\">A<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.0715em\">C<\/span><\/span><\/span><\/span><\/span>, <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\"><\/p>\n<p>         P<\/p>\n<p>         W<\/p>\n<p>         M<\/p>\n<p>        PWM<\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">P<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">W<\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.109em\">M<\/span><\/span><\/span><\/span><\/span>, \u89e6\u6478\u4f20\u611f\u5668\u7b49<\/li>\n<li>\u5145\u8db3\u7684\u5185\u5b58&#xff08;RAM \u548c Flash \u9009\u9879\u591a\u6837&#xff09;<\/li>\n<li>\u5f3a\u5927\u7684\u5b89\u5168\u7279\u6027&#xff08;\u5982\u52a0\u5bc6\u52a0\u901f\u5668&#xff09;<\/li>\n<li>\u8d85\u4f4e\u529f\u8017\u8bbe\u8ba1&#xff0c;\u652f\u6301\u591a\u79cd\u4f11\u7720\u6a21\u5f0f<\/li>\n<\/ul>\n<h3>2\u3001 ESP-IDF \u8be6\u89e3<\/h3>\n<p>ESP-IDF (Espressif IoT Development Framework) \u662f\u4e50\u946b\u5b98\u65b9\u4e3a ESP32\u3001ESP32-S \u7cfb\u5217\u3001ESP32-C \u7cfb\u5217\u7b49\u82af\u7247\u63d0\u4f9b\u7684\u5f00\u53d1\u6846\u67b6\u548c SDK&#xff08;\u8f6f\u4ef6\u5f00\u53d1\u5de5\u5177\u5305&#xff09;\u3002\u5b83\u662f\u5f00\u53d1\u57fa\u4e8e ESP32 \u82af\u7247\u5e94\u7528\u7a0b\u5e8f\u7684\u9996\u9009\u548c\u5b98\u65b9\u63a8\u8350\u5de5\u5177\u3002<\/p>\n<h4>2.1 \u3001ESP-IDF \u7684\u6838\u5fc3\u7ec4\u4ef6\u4e0e\u67b6\u6784<\/h4>\n<p>ESP-IDF \u662f\u4e00\u4e2a\u5206\u5c42\u3001\u6a21\u5757\u5316\u7684\u6846\u67b6&#xff1a;<\/p>\n<ul>\n<li>\u786c\u4ef6\u62bd\u8c61\u5c42 (HAL)&#xff1a; \u63d0\u4f9b\u5bf9\u82af\u7247\u786c\u4ef6\u8d44\u6e90&#xff08;\u5982 GPIO\u3001UART\u3001SPI\u3001I2C\u3001\u5b9a\u65f6\u5668\u3001ADC\u3001DAC\u3001RTC\u3001Wi-Fi\u3001\u84dd\u7259\u7b49&#xff09;\u8fdb\u884c\u64cd\u4f5c\u7684\u7edf\u4e00\u63a5\u53e3&#xff0c;\u5c4f\u853d\u5e95\u5c42\u786c\u4ef6\u7ec6\u8282\u3002<\/li>\n<li>\u9a71\u52a8 (Drivers)&#xff1a; \u5728 HAL \u4e4b\u4e0a&#xff0c;\u63d0\u4f9b\u66f4\u6613\u7528\u3001\u529f\u80fd\u66f4\u4e30\u5bcc\u7684\u8bbe\u5907\u9a71\u52a8&#xff08;\u5982 SPI Flash \u9a71\u52a8\u3001SD \u5361\u9a71\u52a8\u3001\u4ee5\u592a\u7f51\u9a71\u52a8\u7b49&#xff09;\u3002<\/li>\n<li>FreeRTOS&#xff1a; ESP-IDF \u6df1\u5ea6\u96c6\u6210\u4e86\u5f00\u6e90\u7684 FreeRTOS \u5b9e\u65f6\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u3002\u5b83\u63d0\u4f9b\u4e86\u4efb\u52a1\u7ba1\u7406\u3001\u961f\u5217\u3001\u4fe1\u53f7\u91cf\u3001\u8f6f\u4ef6\u5b9a\u65f6\u5668\u3001\u4e2d\u65ad\u7ba1\u7406\u7b49\u673a\u5236&#xff0c;\u5145\u5206\u5229\u7528 ESP32 \u7684\u591a\u6838\u7279\u6027&#xff08;\u4efb\u52a1\u53ef\u4ee5\u5728\u4e0d\u540c\u6838\u5fc3\u4e0a\u8fd0\u884c&#xff09;\u3002<\/li>\n<li>\u4e2d\u95f4\u4ef6&#xff1a;\n<ul>\n<li>Wi-Fi \u534f\u8bae\u6808&#xff1a; \u5b9e\u73b0 Wi-Fi \u7684 Station&#xff08;\u5ba2\u6237\u7aef&#xff09;\u3001SoftAP&#xff08;\u63a5\u5165\u70b9&#xff09;\u3001Promiscuous&#xff08;\u76d1\u542c&#xff09;\u6a21\u5f0f\u3002<\/li>\n<li>\u84dd\u7259\u534f\u8bae\u6808&#xff1a; \u5b9e\u73b0\u7ecf\u5178\u84dd\u7259\u548c\u4f4e\u529f\u8017\u84dd\u7259 (BLE) \u7684\u5404\u79cd\u89d2\u8272&#xff08;\u5982 GATT Client\/Server, GAP Central\/Peripheral&#xff09;\u3002<\/li>\n<li>TCP\/IP \u534f\u8bae\u6808 (lwIP)&#xff1a; \u8f7b\u91cf\u7ea7\u7684 TCP\/IP \u534f\u8bae\u6808&#xff0c;\u652f\u6301 IPv4\/IPv6 (\u90e8\u5206\u578b\u53f7)\u3001DHCP\u3001DNS\u3001Socket API \u7b49\u3002<\/li>\n<li>\u6587\u4ef6\u7cfb\u7edf (FATFS\/VFS)&#xff1a; \u652f\u6301\u5728 SPI Flash \u6216\u5916\u90e8\u5b58\u50a8\u8bbe\u5907\u4e0a\u4f7f\u7528 FAT \u6587\u4ef6\u7cfb\u7edf\u3002<\/li>\n<li>\u52a0\u5bc6\u5e93&#xff1a; \u63d0\u4f9b AES\u3001SHA\u3001RSA \u7b49\u52a0\u5bc6\u7b97\u6cd5\u7684\u8f6f\u4ef6\u548c\u786c\u4ef6\u52a0\u901f\u5b9e\u73b0\u3002<\/li>\n<li>HTTP\/WebSocket\/MQTT \u7b49\u534f\u8bae\u5e93&#xff1a; \u65b9\u4fbf\u6784\u5efa\u7f51\u7edc\u5e94\u7528\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5e94\u7528\u7a0b\u5e8f&#xff1a; \u7528\u6237\u7f16\u5199\u7684\u4e1a\u52a1\u903b\u8f91\u4ee3\u7801&#xff0c;\u8fd0\u884c\u5728 FreeRTOS \u7684\u4efb\u52a1\u4e2d&#xff0c;\u901a\u8fc7\u8c03\u7528\u4e0b\u5c42 API \u5b9e\u73b0\u529f\u80fd\u3002<\/li>\n<\/ul>\n<h4>2.2 \u3001ESP-IDF \u5f00\u53d1\u73af\u5883\u4e0e\u5de5\u5177\u94fe<\/h4>\n<ul>\n<li>\u5de5\u5177\u94fe&#xff1a; \u57fa\u4e8e GNU GCC \u7f16\u8bd1\u5668&#xff08;\u9488\u5bf9 Xtensa \u6216 RISC-V \u67b6\u6784&#xff09;\u3002<\/li>\n<li>\u6784\u5efa\u7cfb\u7edf&#xff1a; \u4f7f\u7528 CMake&#xff08;\u65e9\u671f\u7248\u672c\u4f7f\u7528 GNU Make&#xff09;\u3002\u5f00\u53d1\u8005\u7f16\u5199 CMakeLists.txt \u6587\u4ef6\u6765\u5b9a\u4e49\u9879\u76ee\u7ed3\u6784\u3001\u6e90\u6587\u4ef6\u3001\u4f9d\u8d56\u7ec4\u4ef6\u7b49\u3002<\/li>\n<li>\u914d\u7f6e\u5de5\u5177&#xff1a; menuconfig\u3002\u8fd9\u662f\u4e00\u4e2a\u57fa\u4e8e\u6587\u672c\u7684\u56fe\u5f62\u5316\u914d\u7f6e\u5de5\u5177&#xff08;\u7c7b\u4f3c\u4e8e Linux Kernel \u7684 make menuconfig&#xff09;&#xff0c;\u7528\u4e8e\u914d\u7f6e ESP-IDF \u7684\u4f17\u591a\u9009\u9879&#xff0c;\u5982&#xff1a;\n<ul>\n<li>\u9009\u62e9\u76ee\u6807\u82af\u7247\u578b\u53f7<\/li>\n<li>\u914d\u7f6e Wi-Fi\/BT \u53c2\u6570<\/li>\n<li>\u8c03\u6574 FreeRTOS \u8bbe\u7f6e&#xff08;\u4efb\u52a1\u6808\u5927\u5c0f\u3001\u4f18\u5148\u7ea7\u7b49&#xff09;<\/li>\n<li>\u914d\u7f6e\u65e5\u5fd7\u8f93\u51fa\u7ea7\u522b\u548c\u65b9\u5f0f<\/li>\n<li>\u914d\u7f6e\u5185\u5b58\u5e03\u5c40<\/li>\n<li>\u542f\u7528\/\u7981\u7528\u7279\u5b9a\u529f\u80fd\u548c\u5916\u8bbe\u9a71\u52a8<\/li>\n<\/ul>\n<\/li>\n<li>\u6838\u5fc3\u5de5\u5177 &#8211; idf.py&#xff1a; \u8fd9\u662f ESP-IDF \u63d0\u4f9b\u7684\u547d\u4ee4\u884c\u5de5\u5177&#xff0c;\u7528\u4e8e\u6267\u884c\u6784\u5efa\u3001\u70e7\u5f55\u3001\u8c03\u8bd5\u3001\u76d1\u89c6\u4e32\u53e3\u8f93\u51fa\u7b49\u51e0\u4e4e\u6240\u6709\u5f00\u53d1\u4efb\u52a1\u3002\u5e38\u7528\u547d\u4ee4\u5982&#xff1a;\n<ul>\n<li>idf.py set-target esp32 (\u8bbe\u7f6e\u76ee\u6807\u82af\u7247)<\/li>\n<li>idf.py menuconfig (\u542f\u52a8\u914d\u7f6e\u5de5\u5177)<\/li>\n<li>idf.py build (\u7f16\u8bd1\u9879\u76ee)<\/li>\n<li>idf.py -p PORT flash (\u70e7\u5f55\u56fa\u4ef6\u5230\u8bbe\u5907&#xff0c;PORT \u4e3a\u4e32\u53e3&#xff0c;\u5982 COM3 \u6216 \/dev\/ttyUSB0)<\/li>\n<li>idf.py -p PORT monitor (\u542f\u52a8\u4e32\u53e3\u76d1\u89c6\u5668&#xff0c;\u67e5\u770b\u8bbe\u5907\u65e5\u5fd7\u8f93\u51fa)<\/li>\n<li>idf.py fullclean (\u5f7b\u5e95\u6e05\u7406\u6784\u5efa\u76ee\u5f55)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>2.3 \u3001ESP-IDF \u5f00\u53d1\u6d41\u7a0b\u7b80\u8ff0<\/h4>\n<li>\u73af\u5883\u642d\u5efa&#xff1a; \u5728 Windows\u3001Linux \u6216 macOS \u4e0a\u5b89\u88c5 ESP-IDF \u5f00\u53d1\u73af\u5883&#xff08;\u5305\u62ec\u5de5\u5177\u94fe\u3001Python\u3001Git \u7b49&#xff09;\u3002<\/li>\n<li>\u521b\u5efa\u9879\u76ee&#xff1a; \u4f7f\u7528 idf.py create-project \u6216\u590d\u5236\u793a\u4f8b\u9879\u76ee\u6a21\u677f\u3002<\/li>\n<li>\u7f16\u5199\u4ee3\u7801&#xff1a; \u5728 main \u76ee\u5f55\u4e0b\u7f16\u5199\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801 (\u901a\u5e38\u662f main.c \u6216 app_main() \u51fd\u6570)\u3002<\/li>\n<li>\u914d\u7f6e\u9879\u76ee&#xff1a; \u8fd0\u884c idf.py menuconfig \u6839\u636e\u9700\u6c42\u8fdb\u884c\u914d\u7f6e\u3002<\/li>\n<li>\u7f16\u8bd1\u9879\u76ee&#xff1a; \u8fd0\u884c idf.py build \u751f\u6210\u53ef\u6267\u884c\u56fa\u4ef6 (.bin \u6587\u4ef6)\u3002<\/li>\n<li>\u70e7\u5f55\u56fa\u4ef6&#xff1a; \u5c06 ESP32 \u5f00\u53d1\u677f\u8fde\u63a5\u5230\u7535\u8111&#xff0c;\u8fd0\u884c idf.py -p PORT flash \u5c06\u56fa\u4ef6\u70e7\u5f55\u5230\u8bbe\u5907 Flash \u4e2d\u3002<\/li>\n<li>\u76d1\u89c6\u8f93\u51fa&#xff1a; \u8fd0\u884c idf.py -p PORT monitor \u67e5\u770b\u8bbe\u5907\u8fd0\u884c\u65e5\u5fd7&#xff0c;\u8fdb\u884c\u8c03\u8bd5\u3002\u53ef\u4ee5\u4f7f\u7528 ESP_LOGx (\u5982 ESP_LOGI, ESP_LOGE) \u51fd\u6570\u6253\u5370\u4e0d\u540c\u7ea7\u522b\u7684\u65e5\u5fd7\u3002<\/li>\n<h4>2.4\u3001 \u793a\u4f8b\u4ee3\u7801\u7ed3\u6784 (\u6700\u7b80\u5355\u7684 Hello World)<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;freertos\/FreeRTOS.h&#034;<\/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\">&#034;freertos\/task.h&#034;<\/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\">&#034;esp_log.h&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>TAG <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;MAIN&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">app_main<\/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 keyword\">while<\/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 function\">ESP_LOGI<\/span><span class=\"token punctuation\">(<\/span>TAG<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Hello World!&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6253\u5370 Info \u7ea7\u522b\u65e5\u5fd7<\/span><br \/>\n        <span class=\"token function\">vTaskDelay<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">pdMS_TO_TICKS<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5ef6\u65f6 1000 \u6beb\u79d2 (FreeRTOS \u5ef6\u65f6)<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2.5\u3001 \u4f18\u52bf\u4e0e\u7279\u70b9<\/h4>\n<ul>\n<li>\u5b98\u65b9\u652f\u6301&#xff1a; \u7531\u82af\u7247\u539f\u5382\u7ef4\u62a4&#xff0c;\u66f4\u65b0\u53ca\u65f6&#xff0c;\u4e0e\u65b0\u82af\u7247\u7279\u6027\u540c\u6b65\u5feb\u3002<\/li>\n<li>\u529f\u80fd\u5168\u9762&#xff1a; \u63d0\u4f9b\u5bf9 ESP32 \u6240\u6709\u786c\u4ef6\u7279\u6027\u548c\u5916\u8bbe\u7684\u5e95\u5c42\u8bbf\u95ee\u3002<\/li>\n<li>\u6027\u80fd\u4f18\u5316&#xff1a; \u9488\u5bf9 ESP32 \u786c\u4ef6\u8fdb\u884c\u4e86\u6df1\u5ea6\u4f18\u5316&#xff08;\u5982 Wi-Fi\/BT \u5171\u5b58&#xff09;\u3002<\/li>\n<li>\u7a33\u5b9a\u6027\u9ad8&#xff1a; \u7ecf\u8fc7\u5927\u91cf\u5546\u4e1a\u4ea7\u54c1\u9a8c\u8bc1\u3002<\/li>\n<li>\u793e\u533a\u6d3b\u8dc3&#xff1a; \u7528\u6237\u591a&#xff0c;\u793e\u533a\u652f\u6301\u597d&#xff0c;\u95ee\u9898\u5bb9\u6613\u627e\u5230\u89e3\u51b3\u65b9\u6848\u3002<\/li>\n<li>\u6587\u6863\u5b8c\u5584&#xff1a; \u5b98\u65b9\u63d0\u4f9b\u8be6\u5c3d\u7684 API \u53c2\u8003\u6307\u5357\u3001\u7f16\u7a0b\u6307\u5357\u548c\u793a\u4f8b\u4ee3\u7801\u3002<\/li>\n<li>\u6a21\u5757\u5316&#xff1a; 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