esp 8266接收ESP32的温湿度信息mqtt上传阿里云
时间: 2023-10-17 09:22:14 浏览: 82
要实现ESP8266接收ESP32的温湿度信息并通过MQTT上传到阿里云,可以按照以下步骤进行操作:
1. 配置ESP32的温湿度传感器和MQTT客户端,实现数据的采集和上传。具体实现方法可以参考ESP32官方文档或相关教程。
2. 在ESP8266上安装MQTT客户端库,例如PubSubClient库。
3. 在ESP8266上编写代码,实现订阅ESP32上传的温湿度数据并通过MQTT上传到阿里云。以下是示例代码:
```
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
const char* mqtt_server = "your_MQTT_SERVER";
const int mqtt_port = 1883;
const char* mqtt_user = "your_MQTT_USER";
const char* mqtt_password = "your_MQTT_PASSWORD";
const char* mqtt_topic = "your_MQTT_TOPIC";
WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
Serial.begin(9600);
delay(10);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("WiFi connected");
mqttClient.setServer(mqtt_server, mqtt_port);
mqttClient.setCallback(mqttCallback);
}
void loop() {
if (!mqttClient.connected()) {
reconnect();
}
mqttClient.loop();
}
void reconnect() {
while (!mqttClient.connected()) {
Serial.println("Connecting to MQTT server...");
if (mqttClient.connect("ESP8266Client", mqtt_user, mqtt_password)) {
Serial.println("MQTT connected");
mqttClient.subscribe(mqtt_topic);
} else {
Serial.print("failed with state ");
Serial.print(mqttClient.state());
delay(2000);
}
}
}
void mqttCallback(char* topic, byte* payload, unsigned int length) {
Serial.print("Message received on topic: ");
Serial.println(topic);
Serial.print("Message content: ");
String message = "";
for (int i = 0; i < length; i++) {
message += (char)payload[i];
}
Serial.println(message);
mqttClient.publish(mqtt_topic, message.c_str());
}
```
在代码中,需要配置WiFi连接、MQTT服务器地址和认证信息、MQTT主题等参数。在setup()函数中,连接WiFi并初始化MQTT客户端。在loop()函数中,检查MQTT连接状态并处理MQTT消息。在reconnect()函数中,重新连接MQTT服务器并订阅主题。在mqttCallback()函数中,处理收到的MQTT消息并将其重发到阿里云。
4. 将ESP8266和ESP32连接在同一个局域网内,并将ESP32上传的温湿度数据发布到MQTT主题。ESP8266将自动订阅该主题并上传数据到阿里云。
注意,如果使用阿里云的MQTT服务,还需要在阿里云上配置相应的Topic和访问权限。具体操作可以参考阿里云MQTT文档。
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