// Deklarasi pin lampu
#define ledMerah 4
#define ledHijau 6
#define ledKuning 7

#include <LiquidCrystal_I2C.h> // Memanggil Library LCD
#include <DHT.h>  // Memanggil Library Senssor DHT22
#define DHTPIN 2 // Deklarasi Pin Sensor DHT22
#define DHTTYPE DHT22  // Menentukan Tipe Sensor DHT
DHT dht(DHTPIN, DHTTYPE);  
LiquidCrystal_I2C lcd(0x27, 16, 2); // Mengatur Alamat LCD

void setup()
{
  pinMode(ledMerah, OUTPUT);
   pinMode(ledHijau, OUTPUT);
   pinMode(ledKuning, OUTPUT);
  
dht.begin();
lcd.init();
lcd.backlight();
lcd.setCursor(2,0);
lcd.print("SENSOR SUHU");
}
void loop()
{
  float Suhu = dht.readTemperature();
  int Kelembaban = dht.readHumidity();
  
  lcd.setCursor(0,0);
  lcd.print("T=");
  lcd.print(Suhu,1);lcd.write(0xdf);lcd.print("C  ");
  lcd.print("H=");
  lcd.print(Kelembaban);lcd.print("%  ");

  if (Suhu <=18){                 //Jika suhu < 18*C, maka
    digitalWrite(ledHijau, HIGH);   //LED hijau menyala
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledKuning, LOW);
  }
  else if(Suhu >=22){                 //Jika suhu <= 22*C, maka
    digitalWrite(ledKuning, HIGH);   //LED kuning menyala
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledHijau, LOW); 
  }
    else if(Suhu == 36){                 //Jika suhu <= 22*C, maka
    digitalWrite(ledMerah, HIGH);   //LED merah menyala
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledHijau, LOW); 
  }
}