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

LiquidCrystal_I2C lcd(0x27, 16, 2);  

const int upButton = 35;    // Pin untuk tombol up
const int downButton = 32;  // Pin untuk tombol down
const int buzzerPin = 2;   // Pin untuk buzzer

int counter = 0;
bool buzzerActive = false;

void setup() {
  pinMode(upButton, INPUT_PULLUP);
  pinMode(downButton, INPUT_PULLUP);
  pinMode(buzzerPin, OUTPUT);
  
  lcd.init();  // Inisialisasi LCD
  lcd.backlight();  // Nyalakan backlight LCD
  
  updateLCD();  // Tampilkan nilai awal counter
}

void loop() {
  if (digitalRead(upButton) == LOW) {
    delay(50);  
    if (digitalRead(upButton) == LOW) {
      counter++;
      updateLCD();
      
      if (counter >= 10 && !buzzerActive) {
        buzzerActive = true;
        tone(buzzerPin, 1000);  
      }
      
      while (digitalRead(upButton) == LOW);  
    }
  }
  
  if (digitalRead(downButton) == LOW) {
    delay(50);  // Debounce
    if (digitalRead(downButton) == LOW) {
      if (counter > 0) {
        counter--;
      }
      updateLCD();
      
      if (counter < 10 && buzzerActive) {
        buzzerActive = false;
        noTone(buzzerPin);  // Matikan buzzer
      }
      
      while (digitalRead(downButton) == LOW);  
    }
  }
}

void updateLCD() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Counter: ");
  lcd.print(counter);
  
  lcd.setCursor(0, 1);
  if (counter >= 10) {
    lcd.print("Alarm Active!");
  } else {
    lcd.print("Alarm Off");
  }
}