Esp32-ETHERNET-Kit mqtt与wifi自由选择功能整合

/* MQTT (over TCP) Example

   This example code is in the Public Domain (or CC0 licensed, at your option.)

   Unless required by applicable law or agreed to in writing, this
   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied.
*/

#include <stdio.h>
#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include "esp_wifi.h"
#include "esp_system.h"
#include "nvs_flash.h"
#include "esp_event.h"
#include "tcpip_adapter.h"
#include "protocol_examples_common.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "freertos/queue.h"
#include "lwip/sockets.h"
#include "lwip/dns.h"
#include "lwip/netdb.h"
#include "esp_log.h"
#include "mqtt_client.h"
#include "event_groups.h"

#define CONNECTED_BITS (GOT_IPV4_BIT)
#define GOT_IPV4_BIT BIT(0)

static const char *TAG = "MQTT_EXAMPLE";
static EventGroupHandle_t s_connect_event_group;
static const char *s_connection_name;
static ip4_addr_t s_ip_addr;

static esp_err_t mqtt_event_handler_cb(esp_mqtt_event_handle_t event)
{
    esp_mqtt_client_handle_t client = event->client;
    int msg_id;
    // your_context_t *context = event->context;
    switch (event->event_id) {
		// 建立连接成功
        case MQTT_EVENT_CONNECTED:
            ESP_LOGI(TAG, "MQTT_EVENT_CONNECTED");
			// 发布主题/topic/qos1，主题消息为“data_3”,qos=1
//            msg_id = esp_mqtt_client_publish(client, "/topic/qos1", "data_3", 0, 1, 0);
			msg_id = esp_mqtt_client_publish(client, "Server_subscribe", "I'am_client", 0, 1, 0);
//			msg_id = esp_mqtt_client_publish(client, "Server_subscribe", "I'am_client", 0, 0, 0);
            ESP_LOGI(TAG, "sent publish successful, msg_id=%d", msg_id);
			// 订阅主题，qos=0
//            msg_id = esp_mqtt_client_subscribe(client, "/topic/qos0", 0);
			msg_id = esp_mqtt_client_subscribe(client, "Client_subscribe", 0);
            ESP_LOGI(TAG, "sent subscribe successful, msg_id=%d", msg_id);
			// 订阅主题，qos=1
//            msg_id = esp_mqtt_client_subscribe(client, "/topic/qos1", 1);
			msg_id = esp_mqtt_client_subscribe(client, "Client_subscribe", 1);
            ESP_LOGI(TAG, "sent subscribe successful, msg_id=%d", msg_id);
			// 取消订阅主题，qos=1
            msg_id = esp_mqtt_client_unsubscribe(client, "/topic/qos1");
            ESP_LOGI(TAG, "sent unsubscribe successful, msg_id=%d", msg_id);
            break;
		// 客户端断开连接
        case MQTT_EVENT_DISCONNECTED:
            ESP_LOGI(TAG, "MQTT_EVENT_DISCONNECTED");
            break;
		// 主题订阅成功
        case MQTT_EVENT_SUBSCRIBED:
            ESP_LOGI(TAG, "MQTT_EVENT_SUBSCRIBED, msg_id=%d", event->msg_id);
            msg_id = esp_mqtt_client_publish(client, "/topic/qos0", "data", 0, 0, 0);
            ESP_LOGI(TAG, "sent publish successful, msg_id=%d", msg_id);
            break;
		// 取消订阅
        case MQTT_EVENT_UNSUBSCRIBED:
            ESP_LOGI(TAG, "MQTT_EVENT_UNSUBSCRIBED, msg_id=%d", event->msg_id);
            break;
		//  主题发布成功
        case MQTT_EVENT_PUBLISHED:
            ESP_LOGI(TAG, "MQTT_EVENT_PUBLISHED, msg_id=%d", event->msg_id);
            break;
		// 已收到订阅的主题消息
        case MQTT_EVENT_DATA:
            ESP_LOGI(TAG, "MQTT_EVENT_DATA");
            printf("TOPIC=%.*s\r\n", event->topic_len, event->topic);
//            printf("DATA=%.*s\r\n", event->data_len, event->data);
			printf("%.*s\r\n", event->data_len, event->data);

            break;
		// 客户端遇到错误
        case MQTT_EVENT_ERROR:
            ESP_LOGI(TAG, "MQTT_EVENT_ERROR");
            break;
        default:
            ESP_LOGI(TAG, "Other event id:%d", event->event_id);
            break;
    }
    return ESP_OK;
}
// MQTT事件处理函数
static void mymqtt_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data) {
    ESP_LOGD(TAG, "Event dispatched from event loop base=%s, event_id=%d", base, event_id);
    mqtt_event_handler_cb(event_data);
}

static void mqtt_start(void)
{
	// 1、定义一个MQTT客户端配置结构体，输入MQTT的url
    esp_mqtt_client_config_t mqtt_cfg = {
//        .uri = CONFIG_BROKER_URL,
         .uri = "mqtt://106.14.212.203:1883",
         .client_id = "esp32_ethernet_kit_Dalitek-3F",
         .username = "esp32_ethernet_kit",
         .password = "public",
    };
	// 2、通过esp_mqtt_client_init获取一个MQTT客户端结构体指针，参数是MQTT客户端配置结构体
    esp_mqtt_client_handle_t client = esp_mqtt_client_init(&mqtt_cfg);
	// 3、注册MQTT事件
    esp_mqtt_client_register_event(client, ESP_EVENT_ANY_ID, mymqtt_event_handler, client);//第一个参数为MQTT客户端结构体，第二个是事件ID对应的事件类型，第三个参数即事件处理函数，第四个参数为事件处理函数的参数
	// 4、开启MQTT功能
	esp_mqtt_client_start(client);
}
static void got_ip(void *arg, esp_event_base_t event_base,
                      int32_t event_id, void *event_data)
{
	
    ip_event_got_ip_t *event = (ip_event_got_ip_t *)event_data;
    memcpy(&s_ip_addr, &event->ip_info.ip, sizeof(s_ip_addr));
    xEventGroupSetBits(s_connect_event_group, GOT_IPV4_BIT);
}

static void wifi_disconnect(void *arg, esp_event_base_t event_base,
                               int32_t event_id, void *event_data)
{
    ESP_LOGI(TAG, "Wi-Fi disconnected, trying to reconnect...");
    ESP_ERROR_CHECK(esp_wifi_connect());
}

static void wifi_connect(char *id,char *passwd)
{
    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));

    ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_STA_DISCONNECTED, &wifi_disconnect, NULL));
	ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &got_ip, NULL));
	
    ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));

	wifi_config_t wifi_config;
	bzero(&wifi_config, sizeof(wifi_config_t));
	strcpy((char *)wifi_config.sta.ssid,id);
	strcpy((char *)wifi_config.sta.password, passwd);

    ESP_LOGI(TAG, "Connecting to %s...", wifi_config.sta.ssid);
    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
    ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
    ESP_ERROR_CHECK(esp_wifi_start());
    ESP_ERROR_CHECK(esp_wifi_connect());
    s_connection_name = (char *)wifi_config.sta.ssid;
}

esp_err_t internet_connect(void)
{
    if (s_connect_event_group != NULL) {
        return ESP_ERR_INVALID_STATE;
    }
    s_connect_event_group = xEventGroupCreate();
    wifi_connect("Dalitek-3F","88888888");
//    wifi_connect("Leo","11111111");
    xEventGroupWaitBits(s_connect_event_group, CONNECTED_BITS, true, true, portMAX_DELAY);
    ESP_LOGI(TAG, "Connected to %s", s_connection_name);
    ESP_LOGI(TAG, "IPv4 address: " IPSTR, IP2STR(&s_ip_addr));
    return ESP_OK;
}

void app_main()
{
    ESP_LOGI(TAG, "[APP] Startup..");
    ESP_LOGI(TAG, "[APP] Free memory: %d bytes", esp_get_free_heap_size());
    ESP_LOGI(TAG, "[APP] IDF version: %s", esp_get_idf_version());

    esp_log_level_set("*", ESP_LOG_INFO);
    esp_log_level_set("MQTT_CLIENT", ESP_LOG_VERBOSE);
    esp_log_level_set("MQTT_EXAMPLE", ESP_LOG_VERBOSE);
    esp_log_level_set("TRANSPORT_TCP", ESP_LOG_VERBOSE);
    esp_log_level_set("TRANSPORT_SSL", ESP_LOG_VERBOSE);
    esp_log_level_set("TRANSPORT", ESP_LOG_VERBOSE);
    esp_log_level_set("OUTBOX", ESP_LOG_VERBOSE);

    ESP_ERROR_CHECK(nvs_flash_init());
    tcpip_adapter_init();
    ESP_ERROR_CHECK(esp_event_loop_create_default());

    ESP_ERROR_CHECK(internet_connect());
    mqtt_start();
}

Windows平台实现：

Linux平台实现：

ok