Arduino UNO R3 I2CLCD1602液晶显示器 ESP12E Shield DHT11温湿度模块 有源蜂鸣器 光敏电阻模块 双色LED灯

ESP12E Shield直接覆盖Arduino UNO R3开发板 DHT11模块

I2CLCD1602液晶显示器

光敏电阻模块

有源蜂鸣器

双色LED灯

上传到服务器的配置可参考本博客 一、Arduino UNO R将数据上传到云平台 需要添加两个设备名称humi和temp用于存储温湿度信息

#include <dht.h> #include <LiquidCrystal_I2C.h> #include <Wire.h>  LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x27 and 0x3F for a 16 chars and 2 line display  dht DHT;//create a variable type of dht  const int DHT11_PIN= 2;//Humiture sensor attach to pin2  const int greenPin = 11;  // R petal on RGB LED module connected to digital pin 11  const int redPin= 10;  // G petal on RGB LED module connected to digital pin 10   const int photocellPin = A0; //photoresistor module attach to A0
int outputValue = 0;
const int buzzerPin=7;  //buzzer attach to digital 7
int val = 0; 
int wendu=0;
int shidu=0;
void setup()
{ 
        
  Serial.begin(9600);
  randomSeed(analogRead(0));
  pinMode(buzzerPin,OUTPUT);
  pinMode(redPin, OUTPUT); //set redPin as OUTPUT
  pinMode(greenPin, OUTPUT);//set greenPin as OUTPUT
  lcd.init();  //initialize the lcd
  lcd.backlight();  //open the backlight 
}

void loop()
{ 
        
  // READ DATA
  //Serial.println("DHT11:");
  
D: int chk = DHT.read11(DHT11_PIN);//read the value returned from sensor
  switch (chk)
  { 
        
  case DHTLIB_OK:  
    //Serial.println("OK!"); 
    break;
  case DHTLIB_ERROR_CHECKSUM: 
    //goto D;
    //Serial.print("Checksum error,\t"); 
    break;
  case DHTLIB_ERROR_TIMEOUT: 
    //goto D;
    //Serial.print("Time out error,\t"); 
    break;
  default: 
    // goto D;
    //Serial.print("Unknown error,\t"); 
    break;
  }
  // DISPLAY DATA
  lcd.setCursor(0, 0);
  lcd.print("Tem:");
  //Serial.print("Tem:");
  lcd.print(DHT.temperature,1); //print the temperature on lcd 
  
  wendu = DHT.temperature;
/* Serial.print("wendu:"); Serial.print(wendu); Serial.print("\n"); */
  Serial.print("cmd=upload&device_name=temp&data=");
  Serial.print(wendu);//send a random number
  Serial.println("&uid=beyondyy&key=6d2cc6e3e19efa259a302fcf4166e2ce");


  
  lcd.print(char(223));//print the unit" ℃ "
  lcd.print("C");
  // Serial.println(" C");
  lcd.setCursor(0, 1);
  lcd.print("Hum:");
  //Serial.print("Hum:");
  lcd.print(DHT.humidity,1); //print the humidity on lcd

  shidu = DHT.humidity;
  /* Serial.print("shidu:"); Serial.print(shidu); Serial.print("\n"); */
  Serial.print("cmd=upload&device_name=humi&data=");
  Serial.print(shidu);//send a random number
  Serial.println("&uid=beyondyy&key=6d2cc6e3e19efa259a302fcf4166e2ce");

  lcd.print(" %"); 
  //Serial.println(" %");
  delay(200); //wait a while 

  outputValue = analogRead(photocellPin);//read the value of photoresistor
  //Serial.println(outputValue); //print it in serial monitor
  
  if(outputValue >= 500) //else
  { 
        
    
    digitalWrite(buzzerPin,LOW);
    analogWrite(redPin, 255); //red value decrease
    analogWrite(greenPin, 0); //green value decrease
    delay(100);
    //Serial.println(val, DEC);

  }
  else
  { 
        
    digitalWrite(buzzerPin,HIGH);
    analogWrite(greenPin, 255); //green value decrease
    analogWrite(redPin, 0); //red value decrease
    delay(100);
  }
  delay(1000); //delay 1s

}

所需库下载连接 将下载好的压缩包解压，把文件Dht复制到你的编译器Arduino的libraries文件夹下

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