#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);

#define ENCODER_CLK 2
#define ENCODER_DT 3
#define ENCODER_SW 4

int counter = 0;

bool buttonState = false;
bool lastButtonState = false;

void setup() {
  lcd.init();
  lcd.backlight();

  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  pinMode(ENCODER_SW, INPUT_PULLUP);

  attachInterrupt(digitalPinToInterrupt(ENCODER_CLK), readEncoder, FALLING);
}

void readEncoder() {
  int dtValue = digitalRead(ENCODER_DT);
  if (dtValue == HIGH) {
    counter++;
  }
  if (dtValue == LOW) {
    counter--;
  }
}

void loop() {
  // Baca status tombol encoder
  buttonState = digitalRead(ENCODER_SW);

  // Cek apakah tombol telah ditekan (berubah dari HIGH ke LOW)
  if (buttonState == LOW && lastButtonState == HIGH) {
    // Reset nilai counter ketika tombol ditekan
    counter = 0;
  }

  // Simpan status tombol saat ini sebagai status terakhir
  lastButtonState = buttonState;

  // Tampilkan nilai counter di LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Counter: ");
  lcd.setCursor(0, 1);
  lcd.print(counter);

  // Delay singkat agar tampilan LCD tidak berkedip terlalu cepat
  delay(100);
}