【IPV6从入门到起飞】5-3 IPV6+Home Assistant(ESP32+MQTT+GPIO)远程控制灯

2025/9/14 15:17:15 来源：https://blog.csdn.net/qq_46079439/article/details/142228379 浏览: 次关键词：【IPV6从入门到起飞】5-3 IPV6+Home Assistant(ESP32+MQTT+GPIO)远程控制灯

IPV6+Home Assistant[ESP32+MQTT+GPIO]远程控制灯

1 背景
2 Home Assistant 配置
3 ESP32 配置
- 3-1 工程代码
- 3-2 硬件接线
4 实现效果

1 背景

在上一小节我们通过ESP32接入了Home Assistant，实现了温度、湿度、光照强度的数据采集，但智能家居更多的是实现控制，现在我们通过4个IO以及灯来模拟家庭的设备，通过Home Assistant远程控制开关。

如果有熟读上一节的内容【IPV6从入门到起飞】5-2 IPV6+Home Assistant(ESP32+MQTT+DHT11+BH1750)传感器采集上传监测的话，本节的内容相当简单。

还是老的套路。

2 Home Assistant 配置

配置yaml，添加四个灯，设置主题以及控制字

config/configuration.yaml

mqtt:switch:- name: "Lamp 1"command_topic: "home/esp32/lamp1"payload_on: "1"payload_off: "0"- name: "Lamp 2"command_topic: "home/esp32/lamp2"payload_on: "1"payload_off: "0"- name: "Lamp 3"command_topic: "home/esp32/lamp3"payload_on: "1"payload_off: "0"- name: "Lamp 4"command_topic: "home/esp32/lamp4"payload_on: "1"payload_off: "0"

检查配置，重载配置

在我我们的概览页会出现四个开关

在这里插入图片描述

3 ESP32 配置

直接使用GPIO5、18、19、21作为输出

3-1 工程代码

#include <WiFi.h>
#include <PubSubClient.h>const char* ssid = "mywifi_2.4G";            // 替换为你的 Wi-Fi SSID
const char* password = "12345666";           // 替换为你的 Wi-Fi 密码
const char* mqttServer = "192.168.66.118";   // 替换为你的 MQTT Broker IP
const int mqttPort = 1883;                    // 默认 MQTT 端口
const char* mqttUser = "YOUR_MQTT_USERNAME"; // 如果需要，替换为你的用户名
const char* mqttPassword = "YOUR_MQTT_PASSWORD"; // 如果需要，替换为你的密码WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);// 定义灯的 GPIO 引脚
const int lamp1Pin = 5;
const int lamp2Pin = 18;
const int lamp3Pin = 19;
const int lamp4Pin = 21;void setup() {Serial.begin(115200);// 设置 GPIO 引脚为输出pinMode(lamp1Pin, OUTPUT);pinMode(lamp2Pin, OUTPUT);pinMode(lamp3Pin, OUTPUT);pinMode(lamp4Pin, OUTPUT);// 连接到 Wi-FiconnectToWiFi();// 设置 MQTT 服务器mqttClient.setServer(mqttServer, mqttPort);mqttClient.setCallback(mqttCallback);
}void loop() {if (!mqttClient.connected()) {reconnectMQTT();}mqttClient.loop();
}void connectToWiFi() {Serial.print("Connecting to WiFi...");WiFi.begin(ssid, password);while (WiFi.status() != WL_CONNECTED) {delay(1000);Serial.print(".");}Serial.println("Connected to WiFi!");
}void reconnectMQTT() {while (!mqttClient.connected()) {Serial.println("Attempting MQTT connection...");if (mqttClient.connect("ESP32Client", mqttUser, mqttPassword)) {Serial.println("connected");mqttClient.subscribe("home/esp32/lamp1");mqttClient.subscribe("home/esp32/lamp2");mqttClient.subscribe("home/esp32/lamp3");mqttClient.subscribe("home/esp32/lamp4");} else {Serial.print("failed, rc=");Serial.print(mqttClient.state());Serial.println(" try again in 5 seconds");delay(5000);}}
}void mqttCallback(char* topic, byte* payload, unsigned int length) {payload[length] = '\0'; // 确保字符串结束String message = String((char*)payload);if (strcmp(topic, "home/esp32/lamp1") == 0) {digitalWrite(lamp1Pin, message == "1" ? HIGH : LOW);} else if (strcmp(topic, "home/esp32/lamp2") == 0) {digitalWrite(lamp2Pin, message == "1" ? HIGH : LOW);} else if (strcmp(topic, "home/esp32/lamp3") == 0) {digitalWrite(lamp3Pin, message == "1" ? HIGH : LOW);} else if (strcmp(topic, "home/esp32/lamp4") == 0) {digitalWrite(lamp4Pin, message == "1" ? HIGH : LOW);}
}