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 5static 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-FiESP_ERROR_CHECK(nvs_flash_init());wifi_init_sta();
}