#include<LiquidCrystal_I2C.h>
#include<LiquidCr
#include <DHT.h> 
DHT dht(2 , DHT22) ; 
LiquidCrystal_I2C lcd(0x27 , 20 , 4)  ; 
float temperature , humidity ; 
int light ; 
void setup() {
lcd.init() ; 
lcd.backlight() ; 
//lcd.backlight() ; 
dht.begin() ; 
Serial.begin(9600);
}
void loop() {
temperature = dht.readTemperature() ; 
humidity = dht.readHumidity() ; 
light = 1023 - analogRead(A0) ; 
light = light * 0.097 ; 
Serial.println(light) ; 

lcd.setCursor(0 , 0) ; 
lcd.print("temperature = "+String(temperature)+"C") ; 

lcd.setCursor(0 , 1) ; 
lcd.print("humidity = "+String(humidity)+"%") ; 
lcd.setCursor(0 , 2) ; 
lcd.print("light = "+String(light)+" %") ;
if(light < 30){
  lcd.backlight() ; 
}
else {
  lcd.noBacklight() ; 
}

delay(50) ; 

}