#include <LiquidCrystal_I2C.h>
#include "DHT.h"

#define DHTPIN 2
#define DHTTYPE DHT22  
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27,20,4);
float Trange_Min=20,Trange_Max=30;
float Hrange_Min=40,Hrange_Max=60;
void setup()
{
  dht.begin();
  lcd.init(); 
  lcd.backlight();
}


void loop()
{
float h = dht.readHumidity();
  float t = dht.readTemperature();
  float f = dht.readTemperature(true);
  float hif = dht.computeHeatIndex(f, h);
  float hic = dht.computeHeatIndex(t, h, false);
    
  
  lcd.setCursor(0,0);
  lcd.print("TEMPERATURE:");
  lcd.print(t);
   lcd.setCursor(0,2);
  lcd.print("HUMIDITY:");
  lcd.print(h);

  if (t<Trange_Min||t>Trange_Max||h<Hrange_Min||h>Hrange_Max){
    //
    tone(3,700);
  }
  else {noTone(3);}
  if (t<Trange_Min||t>Trange_Max){digitalWrite(4,HIGH);}
  else {digitalWrite(4,LOW);}

  if (h<Hrange_Min||h>Hrange_Max){digitalWrite(5,HIGH);}
  else {digitalWrite(5,LOW);}
}