改华为智能插座为mqtt本地控制

华为插座

1. 打开插座后盖板，取出主板

2.取下主板上的8266

3焊上esp32c3 supermini,热熔胶粘上，焊接电源正负极，及第5脚

4.取电源板阻容降压全部。因此电路不能提供足够电流给esp32工作。

5.外接小型ac-dc电源5v

6.刷代码

Mqtt插座成品

特别提醒，所有操作都必须断电，不能带220v电源刷机。

mqtt插座代码

#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "nvs_flash.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "mqtt_client.h"
#include "driver/gpio.h"
#include "esp_netif.h"

#define WIFI_SSID     "CMCC-6ZN9"  //    "ChinaNet-AETP5V"
#define WIFI_PASS      "2KJKWEML"  //     "wf123456" "2KJKWEML"
#define MQTT_BROKER    "mqtt://192.168.101.233:1883"
#define GPIO_OUTPUT_IO 5


static const char *TAG = "LIGHT_CONTROL";

static esp_mqtt_client_handle_t mqtt_client = NULL;

// === 发送 MQTT Discovery 配置 ===
static void send_discovery_config(void) {
    const char *config_topic = "homeassistant/switch/esp32c3_switch/config";
    const char *config_payload =
        "{"
        "\"name\": \"ESP32C3 Switch\","
        "\"command_topic\": \"light/control\","
        "\"payload_on\": \"on\","
        "\"payload_off\": \"off\","
        "\"unique_id\": \"switch1\""
        "}";

    esp_mqtt_client_publish(mqtt_client, config_topic, config_payload, 0, 1, 1);
    ESP_LOGI(TAG, "MQTT discovery config sent");
}

// === MQTT 事件回调 ===
static void mqtt_event_handler_cb(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data) {
    esp_mqtt_event_handle_t event = event_data;
    mqtt_client = event->client;

    switch (event->event_id) {
        case MQTT_EVENT_CONNECTED:
            ESP_LOGI(TAG, "MQTT Connected");
            send_discovery_config();
            esp_mqtt_client_subscribe(event->client, "light/control", 0);
            break;

        case MQTT_EVENT_DATA:
            ESP_LOGI(TAG, "Received on topic: %.*s -> %.*s",
                     event->topic_len, event->topic,
                     event->data_len, event->data);
            if (strncmp(event->topic, "light/control", event->topic_len) == 0) {
                if (strncmp(event->data, "on", event->data_len) == 0) {
                    gpio_set_level(GPIO_OUTPUT_IO, 1);
                    ESP_LOGI(TAG, "GPIO %d set to HIGH", GPIO_OUTPUT_IO);
                } else if (strncmp(event->data, "off", event->data_len) == 0) {
                    gpio_set_level(GPIO_OUTPUT_IO, 0);
                    ESP_LOGI(TAG, "GPIO %d set to LOW", GPIO_OUTPUT_IO);
                }
            }
            break;

        default:
            break;
    }
}

// === 启动 MQTT ===
static void mqtt_app_start(void) {
    esp_mqtt_client_config_t mqtt_cfg = {
        .broker.address.uri = MQTT_BROKER,
    };

    mqtt_client = esp_mqtt_client_init(&mqtt_cfg);
    esp_mqtt_client_register_event(mqtt_client, ESP_EVENT_ANY_ID, mqtt_event_handler_cb, NULL);
    esp_mqtt_client_start(mqtt_client);
}

// === WiFi 事件回调 ===
static void wifi_event_handler(void* arg, esp_event_base_t event_base,
                               int32_t event_id, void* event_data) {
    if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
        esp_wifi_connect();
    } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
        ESP_LOGI(TAG, "WiFi disconnected, retry...");
        esp_wifi_connect();
    } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
        ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
        ESP_LOGI(TAG, "Got IP: " IPSTR, IP2STR(&event->ip_info.ip));
        mqtt_app_start();  // 只有拿到 IP 后才启动 MQTT
    }
}

// === 初始化 WiFi STA ===
static void wifi_init_sta(void) {
    ESP_LOGI(TAG, "Initializing WiFi...");
    esp_netif_init();
    esp_event_loop_create_default();
    esp_netif_create_default_wifi_sta();

    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    esp_wifi_init(&cfg);

    // 注册 WiFi 和 IP 事件回调
    esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &wifi_event_handler, NULL);
    esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &wifi_event_handler, NULL);

    wifi_config_t wifi_config = { 0 };
    strncpy((char*)wifi_config.sta.ssid, WIFI_SSID, sizeof(wifi_config.sta.ssid));
    strncpy((char*)wifi_config.sta.password, WIFI_PASS, sizeof(wifi_config.sta.password));

    esp_wifi_set_mode(WIFI_MODE_STA);
    esp_wifi_set_config(WIFI_IF_STA, &wifi_config);
    esp_wifi_start();
}

// === 主函数 ===
void app_main(void) {
    // 初始化 GPIO2 为输出
    gpio_config_t io_conf_out = {
        .pin_bit_mask = 1ULL << GPIO_OUTPUT_IO,
        .mode = GPIO_MODE_OUTPUT,
        .pull_up_en = GPIO_PULLUP_DISABLE,
        .pull_down_en = GPIO_PULLDOWN_DISABLE,
        .intr_type = GPIO_INTR_DISABLE
    };
    gpio_config(&io_conf_out);



    // 初始化 NVS 和连接 Wi-Fi
    ESP_ERROR_CHECK(nvs_flash_init());
    wifi_init_sta();
}