#include <Wire.h>               //นำเข้า Libary ที่ต้องการใช้
#include <LiquidCrystal_I2C.h>
#include "DHT.h"

#define DHT1PIN 10
#define DHT2PIN 9
#define DHT3PIN 8
#define DHTTYPE DHT22

DHT dht1(DHT1PIN, DHTTYPE);
DHT dht2(DHT2PIN, DHTTYPE);
DHT dht3(DHT3PIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2); 
int val = 0,sw1 = 5,sw2 = 6;

void setup() {
  dht1.begin();
  dht2.begin();
  dht3.begin();
  lcd.init();
  lcd.backlight();
  
  pinMode(4,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(2,OUTPUT);
  pinMode(sw1,INPUT_PULLUP);
  pinMode(sw2,INPUT_PULLUP);
}

void loop() {
  //val = digitalRead(sw);
  float ave;                  
  float T1 = dht1.readTemperature();
  float T2 = dht2.readTemperature();
  float T3 = dht3.readTemperature(); 
if(digitalRead(sw1)==0){
  val+=1;
}

  if(val==1){    
    digitalWrite(4,HIGH);
    delay(100);
    digitalWrite(4,LOW);
    //delay(100); 
    lcd.setCursor(0,0);                 
    lcd.print(String() + "Temp " + T1 + "C   ");
   
  
  }

  if(val==2){    
    digitalWrite(3,HIGH);
    delay(100);
    digitalWrite(3,LOW);
    //delay(100); 
    lcd.setCursor(0,0);                 
    lcd.print(String() + "Temp " + T2 + "C   ");
    
  }

  if(val==3){    
    digitalWrite(2,HIGH);
    delay(100);
    digitalWrite(2,LOW);
    //delay(100);   
    lcd.setCursor(0,0);               
    lcd.print(String() + "Temp " + T3 + "C   ");

  }
  if(val > 3){
    val = 0;
  }
  if(digitalRead(sw2)==0){
  ave =(T1+T2+T3)/3;
  lcd.setCursor(0,1);
  lcd.print(String()+("AVE : ")+ave);
}
}