#include <LiquidCrystal_I2C.h> 
#include <Wire.h>
LiquidCrystal_I2C lcd (0x27, 20,4);
#include <DHT.h>;
#define DHTPIN  2
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);
int led = 4;

void setup() 
{
  lcd.init() ;
  lcd.backlight() ;
  lcd.print("Monitoring DHT22");
  delay(1000);
  lcd.clear();
  Serial.begin(9600);
  dht.begin () ;
  pinMode (led, OUTPUT );

  }
  
  void loop () {

  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

   
  if (isnan(temperature) || isnan(humidity)) {
    return;
  }

  if (temperature > 30 ) {
    digitalWrite (led, HIGH );
    lcd. setCursor (0,3);
    lcd. print ("LED ON");
  }
  if (temperature < 30 ) {
    digitalWrite ( led, LOW ) ;
    lcd. setCursor (0, 3) ;
    lcd. print ("LED OF") ;
  }
  lcd. setCursor (0,0);
  lcd. print ("SUHU ");
  lcd. print (temperature);
  lcd. print (" C ");
  lcd. setCursor (0,1);
  lcd. print ("kelembapan :");
  lcd. print (humidity);
  lcd. print ("%");
  delay (1000);

    
  Serial.print(F("umidity: "));
  Serial.print(humidity);
  Serial.print("%");
  Serial.print(temperature);
  Serial.println(" C");

  // Wait a few seconds between measurements.
  delay(2000);
}