54 ESP32Wifi模块之开启AP+STA共存及IP |
您所在的位置：网站首页 › 路由sta › 54 ESP32Wifi模块之开启AP+STA共存及IP |
54 ESP32Wifi模块之开启AP+STA共存及IP
|
54.1 引言
探索完4G模块的应用、蓝牙模块的应用，最近开始了WiFi模块的使用。WiFi模块我们选择了广泛应用的esp32WiFi模组，所以就重新踏入了WiFi探索之旅。 然后项目上要用到WiFi的AP+STA模式，并且要开启NAT模式，就是WiFi模块能连接路由器，然后手机能连接WiFi模块，然后手机通过WiFi模块连接到路由器，能通过WiFi模块上网。 54.2 AP+STA+IP_NAPT代码话不多说，先上app_main.c代码。这个代码也是网上搜集到的，自己理解后翻炒了一遍吧。。 #include #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "freertos/event_groups.h" #include "esp_system.h" #include "esp_wifi.h" #include "esp_wpa2.h" #include "esp_event.h" #include "esp_log.h" #include "nvs_flash.h" #include "driver/gpio.h" #include "lwip/opt.h" #if IP_NAPT #include "lwip/lwip_napt.h" #endif #include "lwip/err.h" #include "lwip/sys.h" #define MY_DNS_IP_ADDR 0x08080808 // 8.8.8.8 //模块AP自己的SSID和PWD #define HT_ESP32_AP_SSID CONFIG_ESP_AP_SSID #define HT_ESP32_AP_PASS CONFIG_ESP_AP_PASSWORD //连接路由的SSID和PWD #define HT_ESP32_STA_SSID "hello" #define HT_ESP32_STA_PASS "world" #define HT_ESP32_MAXIMUM_RETRY (10) /* FreeRTOS event group to signal when we are connected*/ static EventGroupHandle_t s_wifi_event_group; /* The event group allows multiple bits for each event, but we only care about one event * - are we connected to the AP with an IP? */ const int WIFI_CONNECTED_BIT = BIT0; static const char *TAG = "wifi apsta"; static int s_retry_num = 0; static esp_err_t event_handler(void *ctx, system_event_t *event) { switch(event->event_id) { case SYSTEM_EVENT_STA_START: esp_wifi_connect(); break; case SYSTEM_EVENT_STA_GOT_IP: ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->event_info.got_ip.ip_info.ip)); s_retry_num = 0; xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT); break; case SYSTEM_EVENT_STA_DISCONNECTED: { if (s_retry_num < HT_ESP32_MAXIMUM_RETRY) { esp_wifi_connect(); xEventGroupClearBits(s_wifi_event_group, WIFI_CONNECTED_BIT); s_retry_num++; ESP_LOGI(TAG,"retry to connect to the AP"); } ESP_LOGI(TAG,"connect to the AP failed:%d", event->event_info.disconnected.reason); break; } case SYSTEM_EVENT_AP_STACONNECTED: ESP_LOGI(TAG,"station connected"); break; case SYSTEM_EVENT_AP_STADISCONNECTED: ESP_LOGI(TAG,"station disconnected"); break; default: break; } return ESP_OK; } void wifi_init_sta() { ip_addr_t dnsserver; //tcpip_adapter_dns_info_t dnsinfo; s_wifi_event_group = xEventGroupCreate(); tcpip_adapter_init(); ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL) ); wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT(); ESP_ERROR_CHECK(esp_wifi_init(&cfg)); ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM)); ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_APSTA)); /* ESP STATION CONFIG */ wifi_config_t sta_config = { .sta = { .ssid = HT_ESP32_STA_SSID, .password = HT_ESP32_STA_PASS, /* 设置密码意味着工作站将连接到所有安全模式，包括WEP/WPA. * However these modes are deprecated and not advisable to be used. Incase your Access point * doesn't support WPA2, these mode can be enabled by commenting below line */ .threshold.authmode = WIFI_AUTH_WPA2_PSK, .bssid_set = false, .pmf_cfg = { .capable = true, .required = false }, }, }; /* ESP AP CONFIG */ wifi_config_t ap_config = { .ap = { .ssid = HT_ESP32_AP_SSID, .channel = 0, .authmode = WIFI_AUTH_WPA2_PSK, .password = HT_ESP32_AP_PASS, .ssid_hidden = 0, .max_connection = 4, .beacon_interval = 100 } }; ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &sta_config) ); ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &ap_config) ); // Enable DNS (offer) for dhcp server dhcps_offer_t dhcps_dns_value = OFFER_DNS; dhcps_set_option_info(6, &dhcps_dns_value, sizeof(dhcps_dns_value)); // Set custom dns server address for dhcp server dnsserver.u_addr.ip4.addr = htonl(MY_DNS_IP_ADDR); dnsserver.type = IPADDR_TYPE_V4; dhcps_dns_setserver(&dnsserver); //tcpip_adapter_get_dns_info(TCPIP_ADAPTER_IF_AP, TCPIP_ADAPTER_DNS_MAIN, &dnsinfo); // ESP_LOGI(TAG, "DNS IP:" IPSTR, IP2STR(&dnsinfo.ip.u_addr.ip4)); ESP_ERROR_CHECK(esp_wifi_start()); ESP_LOGI(TAG, "wifi_init_apsta finished."); ESP_LOGI(TAG, "connect to ap SSID: %s ", sta_config.sta.ssid); } static void htHrint_task(void *pvParameters) { while(1) { ESP_LOGI(TAG, "hello world\r\n"); vTaskDelay(1000 / portTICK_PERIOD_MS); /* 延时1000ms*/ } } void app_main() { // Initialize NVS esp_err_t ret = nvs_flash_init(); if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) { ESP_ERROR_CHECK(nvs_flash_erase()); ret = nvs_flash_init(); } ESP_ERROR_CHECK(ret); // Setup WIFI wifi_init_sta(); //这里就是打开nat转换的代码，但是除了代码这里要有，还需要配置 #if IP_NAPT u32_t napt_netif_ip = 0xC0A80401; // Set to ip address of softAP netif (Default is 192.168.4.1) ip_napt_enable(htonl(napt_netif_ip), 1); ESP_LOGI(TAG, "------------------------>NAT is enabled"); #endif xTaskCreate(htHrint_task, "HTTask", 4096, NULL, 5, NULL); } 54.3 IP_NAPT模式配置上述代码中，已经有开启IP_NAPT模式的重要几行代码，但需要关注的是，IP_NAPT这个宏是在哪里开启的，这是本blog的价值所在。 对于新手（像我一样新的应该是不知道），这个可以通过idf.py menuconfig 图形界面进行配置，这个配置在下面这个链接是有相关说明的。 Project Configuration - ESP32 - — ESP-IDF 编程指南 latest 文档
由上述图片可知，需要配置两个宏才能打开nat的转换功能。 配置步骤： 1.使用命令打开配置页面，并进入component config idf.py menuconfig
over！ ESP32将继续探究中......... |
【本文地址】