#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);
#define RELAY_PIN 9

LiquidCrystal_I2C lcd(0x27, 16, 2);
int powerPin = 3;

void setup(){
  lcd.init();
  lcd.backlight();
  pinMode(powerPin, OUTPUT);
  digitalWrite(powerPin, LOW);
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);
  Serial.begin(9600);
  dht.begin();
  lcd.print("Pendeteksi Suhu");
  lcd.setCursor(0, 1);
  lcd.print("Siap!");
  delay(2000);
}

void loop(){
  digitalWrite(powerPin, HIGH);
  float kelembaban = dht.readHumidity();
  float suhu = dht.readTemperature();

  Serial.print("Kelembaban: ");
  Serial.print(kelembaban);
  Serial.print("%");
  Serial.print(" Suhu: ");
  Serial.print(suhu);
  Serial.print(" °C");
  Serial.println();

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Kelembaban: ");
  lcd.setCursor(13, 0);
  lcd.print(kelembaban);
  lcd.print("%");

  lcd.setCursor(0, 1);
  lcd.print("Suhu: ");
  lcd.setCursor(7, 1);
  lcd.print(suhu);
  lcd.print(" °C");

  if (suhu > 25.0) {
    digitalWrite(RELAY_PIN, HIGH);
  }else {
    digitalWrite(RELAY_PIN, LOW);
  }
  delay(1000);
}