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#include <DHT.h>//调用dht11驱动库
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#include <ESP8266WiFi.h>
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#include <ESP8266HTTPClient.h>
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#include <PubSubClient.h>
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//安装DHT11库 DHT sensor library
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//安装mqtt客户端 PubSubClient 库
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#define DHTPIN D4 //说明数据接口为8266开发板的D4口，也可以写为#define DHTPIN 2既8266芯片的IO口2
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#define DHTTYPE DHT11//说明使用的模块是DHT11
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DHT dht(DHTPIN,DHTTYPE);//DHT11初始化
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//定义浮点类型变量保存测量值
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float Temperature;
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float Humidity;
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//定义WIFI信息
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// const char* ssid = "rehome"; // Enter SSID here
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// const char* password = "Ruihong123"; //Enter Password here
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const char* ssid = "mac_mini"; // Enter SSID here
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const char* password = "452131wW"; //Enter Password here
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// MQTT代理配置
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const char *mqtt_broker = "47.242.184.139";
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const char *topic = "/device/esp8266/003";
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// const char* topic01 = "/device/esp8266/006";
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const char *mqtt_username = "admin";
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const char *mqtt_password = "publish452131wW452131wW$";
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const int mqtt_port = 1883;
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WiFiClient espClient;
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PubSubClient client(espClient);
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void setup() {
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pinMode(D2, OUTPUT);
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digitalWrite(D2,HIGH);//IO口2设置为高电平，点亮数字2口LED
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//digitalWrite(D2,LOW);//IO口2设置为高电平，点亮数字2口LED
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Serial.begin(115200);
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delay(100);
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dht.begin();
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Serial.println("Connecting to ");
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Serial.println(ssid);
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//connect to your local wi-fi network
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WiFi.begin(ssid, password);
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//check wi-fi is connected to wi-fi network
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while (WiFi.status() != WL_CONNECTED) {
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delay(1000);
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Serial.print(".");
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}
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Serial.println("");
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Serial.println("WiFi connected..!");
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Serial.print("Got IP: "); Serial.println(WiFi.localIP());
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//mqtt init
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//连接到mqtt代理
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client.setServer(mqtt_broker, mqtt_port);
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client.setCallback(callback);
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while (!client.connected()) {
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String client_id = "esp8266-client-";
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client_id += String(WiFi.macAddress());
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Serial.printf("The client %s connects to the public mqtt broker\n", client_id.c_str());
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if (client.connect(client_id.c_str(), mqtt_username, mqtt_password)) {
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Serial.println("Public emqx mqtt broker connected");
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} else {
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Serial.print("failed with state ");
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Serial.print(client.state());
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delay(2000);
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}
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}
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// 发布和订阅
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//client.publish(topic, "hello emqx");
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// client.subscribe(topic01);
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client.subscribe(topic);
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}
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void loop() {
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//mqtt
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client.loop();
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delay(10000);
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Temperature = dht.readTemperature(); // Gets the values of the temperature
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Humidity = dht.readHumidity(); // Gets the values of the humidity
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//mqtt发布消息
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Serial.println("------------mqtt publish start-----------");
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if (WiFi.status() == WL_CONNECTED) {
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if(client.connected()){
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String sendStr = String(Temperature)+" "+String(Humidity);
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String wendu = String("Tem:")+String(Temperature);
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String shidu = String("Hum:")+String(Humidity);
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Serial.println(sendStr);
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client.publish(topic,sendStr.c_str());
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}else{
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Serial.println(client.state());
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String client_id = "esp8266-client-";
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client_id += String(WiFi.macAddress());
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Serial.printf("The client %s connects to the public mqtt broker\n", client_id.c_str());
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if(client.connect(client_id.c_str(), mqtt_username, mqtt_password)) {
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Serial.println("Public emqx mqtt broker connected");
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// client.subscribe(topic01);
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client.subscribe(topic);
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}else{
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Serial.print("failed with state ");
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Serial.print(client.state());
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}
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}
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}
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Serial.println("------------mqtt publish end-----------");
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}
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void callback(char *topic, byte *payload, unsigned int length) {
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Serial.println("-----------callback------------");
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Serial.print("Message arrived in topic:");
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Serial.println(topic);
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Serial.print("Message:");
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for (int i = 0; i < length; i++) {
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Serial.print((char) payload[i]);
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}
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Serial.println();
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Serial.println("-----------callback------------");
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}
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