homeassistant如何控制esp8266
时间: 2023-10-13 10:06:45 浏览: 37
HomeAssistant可以通过MQTT或HTTP协议来控制ESP8266。
1. 使用MQTT控制ESP8266
在ESP8266上安装MQTT库,然后使用以下代码连接到MQTT代理服务器:
```
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";
const char* mqtt_server = "MQTT_SERVER_IP";
WiFiClient espClient;
PubSubClient client(espClient);
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
while (!client.connected()) {
Serial.println("Connecting to MQTT server...");
if (client.connect("ESP8266Client")) {
Serial.println("Connected to MQTT server");
client.subscribe("homeassistant/switch1");
} else {
Serial.print("Failed with state ");
Serial.print(client.state());
delay(2000);
}
}
}
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
}
void callback(char* topic, byte* message, unsigned int length) {
Serial.print("Message arrived on topic: ");
Serial.print(topic);
Serial.print(". Message: ");
String messageTemp;
for (int i = 0; i < length; i++) {
messageTemp += (char)message[i];
}
Serial.println(messageTemp);
if (String(topic) == "homeassistant/switch1") {
if (messageTemp == "ON") {
digitalWrite(2, HIGH);
} else if (messageTemp == "OFF") {
digitalWrite(2, LOW);
}
}
}
void reconnect() {
while (!client.connected()) {
Serial.println("Connecting to MQTT server...");
if (client.connect("ESP8266Client")) {
Serial.println("Connected to MQTT server");
client.subscribe("homeassistant/switch1");
} else {
Serial.print("Failed with state ");
Serial.print(client.state());
delay(2000);
}
}
}
```
在HomeAssistant中,您需要添加MQTT switch,例如:
```
switch:
- platform: mqtt
name: "Switch 1"
state_topic: "homeassistant/switch1"
command_topic: "homeassistant/switch1"
payload_on: "ON"
payload_off: "OFF"
```
2. 使用HTTP控制ESP8266
在ESP8266上使用以下代码来启动Web服务器:
```
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";
ESP8266WebServer server(80);
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
server.on("/", handleRoot);
server.on("/on", handleOn);
server.on("/off", handleOff);
server.begin();
Serial.println("HTTP server started");
}
void loop() {
server.handleClient();
}
void handleRoot() {
server.send(200, "text/plain", "Hello from ESP8266!");
}
void handleOn() {
digitalWrite(2, HIGH);
server.send(200, "text/plain", "LED turned on");
}
void handleOff() {
digitalWrite(2, LOW);
server.send(200, "text/plain", "LED turned off");
}
```
在HomeAssistant中,您可以使用RESTful switch来控制ESP8266,例如:
```
switch:
- platform: rest
resource: http://ESP8266_IP/on
name: "Switch 1"
body_on: "ON"
body_off: "OFF"
is_on_template: "{{ value_json.is_on }}"
headers:
Content-Type: "text/plain"
```