//Welcome in the project Moch Rijki Supriyatna:("MTS_Iky")
//Sistem Antrian Otomatis
#include <TM1637Display.h>

#define CLK 2
#define DIO 3
#define BUTTON_PIN 4
#define BUZZER_PIN 5
#define TRIG_PIN 6
#define ECHO_PIN 7

TM1637Display display(CLK, DIO);
int currentNumber = 0;
bool lastButtonState = HIGH;

void setup() {
     pinMode(BUTTON_PIN, INPUT_PULLUP);
     pinMode(BUZZER_PIN, OUTPUT);
     pinMode(TRIG_PIN, OUTPUT);
     pinMode(ECHO_PIN, INPUT);

     display.setBrightness(0x0f);
     display.showNumberDec(currentNumber, true);
     }

      void loop() {
           long duration;
           int distance;

           // Baca jarak dari sensor
              digitalWrite(TRIG_PIN, LOW);
              delayMicroseconds(2);
              digitalWrite(TRIG_PIN, HIGH);
              delayMicroseconds(10);
              digitalWrite(TRIG_PIN, LOW);

              duration = pulseIn(ECHO_PIN, HIGH);
              distance = duration * 0.034 / 2;

           // Jika ada orang dekat (kurang dari 30 cm) dan tombol ditekan
              bool buttonState = digitalRead(BUTTON_PIN);
              if (lastButtonState == HIGH && buttonState == LOW && distance < 30) {
              currentNumber++;
              if (currentNumber > 99) currentNumber = 1;

              display.showNumberDec(currentNumber, true); 
              tone(BUZZER_PIN, 1000, 150); // Bunyi singkat
              delay(300); // Debounce
              }

              lastButtonState = buttonState;
              }