//Welcome in the project Moch Rijki Supriyatna:("MMRS_Iky")
//Sistem parkir otomatis
#include <IRremote.h>
#include <TM1637Display.h>
#include <Servo.h>

// Pin setup
#define IR_PIN 2
#define CLK 3
#define DIO 4
#define TRIG_PIN 5
#define ECHO_PIN 6
#define BUZZER_PIN 7
#define SERVO_PIN 9

const int maxSlot = 5; // Jumlah slot parkir
int occupiedSlot = 0;

TM1637Display display(CLK, DIO);
Servo palang;
IRrecv irrecv(IR_PIN);
decode_results results;

unsigned long lastDetectTime = 0;
bool accessGranted = false;

void setup() {
     Serial.begin(9600);
     irrecv.enableIRIn();
     pinMode(TRIG_PIN, OUTPUT);
     pinMode(ECHO_PIN, INPUT);
     pinMode(BUZZER_PIN, OUTPUT);

     palang.attach(SERVO_PIN);
     palang.write(0); // palang tertutup

     display.setBrightness(0x0f);
     display.showNumberDec(maxSlot - occupiedSlot, true);
     }

      void loop() {
           if (irrecv.decode(&results)) {
           unsigned long irCode = results.value;

           // Ganti kode ini sesuai tombol remote Anda
              if (irCode == 0xFFA25D) { // contoh tombol POWER
              if (occupiedSlot < maxSlot) {
              accessGranted = true;
              bukaPalang();
              } else {
              bunyiBuzzer(); // slot penuh
              }
              } else {
              bunyiBuzzer(); // akses ditolak
              }

              irrecv.resume(); // siap baca berikutnya
              }

              if (accessGranted) {
              long duration, distance;
              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;

              if (distance < 15 && millis() - lastDetectTime > 1000) {
              occupiedSlot++;
              if (occupiedSlot > maxSlot) occupiedSlot = maxSlot;
              display.showNumberDec(maxSlot - occupiedSlot, true);
              palang.write(0); // tutup palang
              accessGranted = false;
              lastDetectTime = millis();
              }
              }
              }

              void bukaPalang() {
                   palang.write(90);
                   }

                   void bunyiBuzzer() {
                        tone(BUZZER_PIN, 1000, 300);
                        }