#include <Wire.h>
#include <RTClib.h>
#include <LiquidCrystal_I2C.h>

RTC_DS3231 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Ganti 0x3F dgn 0x27 jika alamat I2C LCD jika berbeda

const int pinRelay = 5;
const int pinTombol = 6;

void setup() {
  Serial.begin(9600);
  Wire.begin();
  rtc.begin();
  lcd.init();
  lcd.backlight();

  // hilangkan tanda "//" dibawah jika ingin mengatur RTC
  //rtc.adjust(DateTime(2024, 11, 8, 21, 24, 00));
  pinMode(pinTombol, INPUT_PULLUP);  
  pinMode(pinRelay, OUTPUT);
}

void loop() {
  DateTime now = rtc.now();

if (digitalRead(pinTombol) == LOW) {
    digitalWrite(pinRelay, HIGH);  // Nyalakan relay jika tombol ditekan
  } else {
  // Nyalakan relay setiap hari pukul 22:00
  if (now.hour() == 22 && now.minute() >= 00 && now.minute() <= 01) {
    digitalWrite(pinRelay, HIGH);
      } else {
    digitalWrite(pinRelay, LOW);
  }}

  // Tampilkan waktu dan status relay pada LCD
  char timeString[16];
  sprintf(timeString, "Waktu: %02d:%02d:%02d", now.hour(), now.minute(), now.second());
  lcd.setCursor(0, 0);
  lcd.print(timeString);

  lcd.setCursor(0, 1);
  if (digitalRead(pinRelay) == HIGH) {
    lcd.print("Relay: HIDUP");
    } else {
    lcd.print("Relay: MATI ");
    }

  delay(1000);
}