#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;

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

  // Inisialisasi pin encoder
  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++; // Arah jarum jam
  } else {
    counter--; // Arah berlawanan jarum jam
  }
}

void loop() {
  // Menampilkan nilai counter pada LCD
  lcd.setCursor(0, 0);
  lcd.print("Counter: ");
  lcd.print(counter);
  delay(100);
}