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

DHT dht(2 , DHT22) ; 

LiquidCrystal_I2C lcd(0x27 , 20 , 4 ) ; 
int light ; 
void setup() {
lcd.init() ; 
dht.begin() ; 
/*lcd.backlight() ; 
lcd.noBacklight() ; */
Serial.begin(9600);
}

void loop() {
float s5ana = dht.readTemperature() ; 
float humidity = dht.readHumidity() ; 
light = 1023 - analogRead(A0);
light = light * 0.097 ; 

lcd.setCursor(0 , 0) ; 
lcd.print("temperature is "+String(s5ana)) ;
lcd.setCursor(0 ,1) ; 
lcd.print("Humidity is "+String(humidity));
lcd.setCursor(0 ,2) ; 
lcd.print("Light is "+String(light)+"%") ; 

if(light < 20){
  lcd.backlight() ; 
}
else{
  lcd.noBacklight() ; 
}



}