const int sensorPin = A0; 
const int buzzerPin = 9;  
const int buttonPin = 2;   
const int digitPins[] = {22, 24, 26}; 
const int segmentPins[] = {30, 32, 34, 36, 38, 40, 42}; 

volatile int count = 0;   // Variabel untuk menyimpan jumlah benda yang terdeteksi

void setup() {
  pinMode(sensorPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);

  for (int i = 0; i < 3; i++) {
    pinMode(digitPins[i], OUTPUT);
  }

  for (int i = 0; i < 7; i++) {
    pinMode(segmentPins[i], OUTPUT);
  }

  attachInterrupt(digitalPinToInterrupt(buttonPin), resetCount, FALLING);
}

void loop() {
  int sensorValue = digitalRead(sensorPin);

  if (sensorValue == HIGH) {
    count++;  // Menambah jumlah benda yang terdeteksi
    delay(250);  // delay untuk menghindari deteksi ganda
  }

  displayCount();  // Menampilkan jumlah product di seven segment

  if (count >= 57) {
    digitalWrite(buzzerPin, HIGH);
  } else {
    digitalWrite(buzzerPin, LOW); 
  }
}

void resetCount() {
  count = 0; 
}

void displayCount() {
  int digits[3];
  digits[0] = count % 10;
  digits[1] = (count / 10) % 10;
  digits[2] = (count / 100) % 10;

  for (int i = 0; i < 3; i++) {
    digitalWrite(digitPins[i], LOW);

    for (int j = 0; j < 7; j++) {
      digitalWrite(segmentPins[j], (displayDigits[digits[i]] >> j) & 1);
    }

    delay(5);
    digitalWrite(digitPins[i], HIGH);
  }
}