esp8266用MQTT连接onenet代码
时间: 2023-09-18 17:08:39 浏览: 53
以下是ESP8266使用MQTT协议连接OneNet的代码示例:
```
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
// WiFi网络参数
const char* ssid = "你的WiFi名称";
const char* password = "你的WiFi密码";
// OneNet平台参数
const char* mqttServer = "183.230.40.39"; // OneNet MQTT服务器地址
const int mqttPort = 6002; // OneNet MQTT服务器端口号
const char* clientId = "你的设备ID";
const char* userName = "你的产品ID";
const char* password = "你的产品APIKey";
// WiFi客户端和MQTT客户端
WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);
void setup() {
Serial.begin(115200);
// 连接WiFi网络
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
// 设置MQTT客户端
mqttClient.setServer(mqttServer, mqttPort);
mqttClient.setCallback(callback);
while (!mqttClient.connected()) {
if (mqttClient.connect(clientId, userName, password)) {
Serial.println("Connected to OneNet MQTT server");
} else {
Serial.print("Failed to connect to OneNet MQTT server, rc=");
Serial.print(mqttClient.state());
Serial.println(" retrying in 5 seconds");
delay(5000);
}
}
}
void loop() {
// 发布消息到OneNet
char payload[50];
sprintf(payload, "{\"datastreams\":[{\"id\":\"temperature\",\"datapoints\":[{\"value\":\"%d\"}]}]}", random(0, 40));
mqttClient.publish("m/yourProductId/yourDeviceId/temperature", payload);
// 订阅OneNet的命令
mqttClient.subscribe("s/yourProductId/yourDeviceId/command");
mqttClient.loop();
}
void callback(char* topic, byte* payload, unsigned int length) {
Serial.println("Message received: ");
Serial.println(topic);
Serial.println(payload);
}
```
请根据自己的OneNet产品信息和WiFi网络参数修改代码中的相应部分。在代码中,我们使用`mqttClient.publish()`向OneNet平台发布温度数据,使用`mqttClient.subscribe()`订阅OneNet平台的命令,使用`mqttClient.loop()`不断处理MQTT消息。其中,`callback()`函数用于接收订阅的命令消息。
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