微信小程式+mqtt,esp8266溫溼度讀取的實現方法

#include <SimpleDHT.h>

// for DHT11, 
//  VCC: 5V or 3V
//  GND: GND
//  DATA: 2
int pinDHT11 = D4;
SimpleDHT11 dht11(pinDHT11);

void setup() {
 Serial.begin(115200);
}

void loop() {
 // start working...
 Serial.println("=================================");
 Serial.println("Sample DHT11...");
 
 // read without samples.
 byte temperature = 0;
 byte humidity = 0;
 int err = SimpleDHTErrSuccess;
 if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
 Serial.print("Read DHT11 failed, err="); Serial.println(err);delay(1000);
 return;
 }
 
 Serial.print("Sample OK: ");
 Serial.print((int)temperature); Serial.print(" *C, "); 
 Serial.print((int)humidity); Serial.println(" H");
 
 // DHT11 sampling rate is 1HZ.
 delay(1500);
}

const char* ssid = "newhtc";     //修改，修改為你的路由的WIFI名字
const char* password = "qq123456";   //修改為你的WIFI密碼
const char* mqtt_server = "bemfa.com";  //預設，MQTT伺服器地址
const int mqtt_server_port = 9501;   //預設，MQTT伺服器埠
#define ID_MQTT "4d9ec352e0376f2110a0c601a2857225" //mqtt使用者端ID，修改為你的開發者金鑰
const char* topic = "led002";      //Led主題名字，可在巴法雲控制檯自行建立，名稱隨意
const char * dhttopic = "temp004";     //溫溼度主題名字，可在巴法雲mqtt控制檯建立
int pinDHT11 = D4;       //dht11感測器引腳輸入
int B_led = D5;       //控制的led引腳
long timeval = 3*1000;     //上傳的感測器時間間隔，預設3秒

long now = millis();//獲取當前時間戳
 if (now - lastMsg > timeval) {//如果達到3s，進行資料上傳
 lastMsg = now;
 // read without samples.
 byte temperature = 0;
 byte humidity = 0;
 int err = SimpleDHTErrSuccess;
 if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
  Serial.print("Read DHT11 failed, err="); Serial.println(err); delay(1000);
  return;
 }
 String msg = "#" + (String)temperature + "#" + (String)humidity + "#" + ledstatus; //資料封裝#溫度#溼度#開關狀態#
 client.publish(dhttopic, msg.c_str());//資料上傳
 }

data: {
 uid:"4d9ec352e0376f2110a0c601a2857225",//使用者金鑰，巴法雲控制檯獲取
 ledtopic:"led002",//控制led的主題，mqtt控制檯建立
 dhttopic:"temp004",//傳輸溫溼度的主題，控制檯建立
 device_status:"離線",// 顯示led是否線上的字串，預設離線
 ledOnOff:"關閉",
 checked: false,//led的狀態。預設led關閉
 wendu:"",//溫度值，預設為空
 shidu:"",//溼度值，預設為空
 ledicon:"/utils/img/lightoff.png",//顯示led圖示的狀態。預設是關閉狀態圖示
 client: null,//mqtt使用者端，預設為空
 },