#include "DHT.h"
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

#define hijau  25
#define kuning 26
#define merah  27
#define DHTPIN 18     // Digital pin connected to the DHT sensor
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(hijau,OUTPUT);
  pinMode(kuning,OUTPUT);
  pinMode(merah,OUTPUT);
  
  lcd.backlight(); lcd.init();
  lcd.setCursor(0,0); lcd.print("  SENSOR SUHU  ");
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));
  dht.begin();
}

void loop() {
  delay(2000);
  int   h = dht.readHumidity();
  float t = dht.readTemperature();
  lcd.setCursor(0,1);
  lcd.print("T="); lcd.print(t,1); lcd.write(0xdf); lcd.print("C  ");
  lcd.print("H="); lcd.print(h); lcd.print("%  ");
  if(t<25) {
    digitalWrite(hijau,HIGH);
    digitalWrite(kuning,LOW);
    digitalWrite(merah,LOW);
    lcd.setCursor(0,0); lcd.print(" SUHU NORMAL ");
  }
  else if(t>=25 && t<35) {
    digitalWrite(hijau,LOW);
    digitalWrite(kuning,HIGH);
    digitalWrite(merah,LOW);
    lcd.setCursor(0,0); lcd.print(" SUHU SEDANG ");
  }
  else {
    digitalWrite(hijau,LOW);
    digitalWrite(kuning,LOW);
    digitalWrite(merah,HIGH);
    lcd.setCursor(0,0); lcd.print(" SUHU PANAS  ");
  }
  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.println(F("°C ")); 
}