#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);

  // Membaca kelembaban dan suhu dari sensor DHT22
  float kelembaban = dht.readHumidity();
  float suhu = dht.readTemperature();

  // Menampilkan data kelembaban dan suhu di Serial Monitor
  Serial.print("Kelembaban: ");
  Serial.print(kelembaban);
  Serial.print("%");
  Serial.print(" Suhu: ");
  Serial.print(suhu);
  Serial.print("°C");
  Serial.println();

  // Menampilkan data kelembaban dan suhu di LCD
  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");

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