#include <Servo.h>
#include <LiquidCrystal_I2C.h>
#include <SPI.h>
#include <MFRC522.h>

#define SS_PIN 10
#define RST_PIN 9

String allowedUIDs[] = {
  "9060D020",
  "E3F7B81D",
};

Servo servo;
LiquidCrystal_I2C lcd(0x27, 16, 2);
MFRC522 rfid(SS_PIN, RST_PIN);

bool doorLocked = true;
unsigned long lastResponseTime = 0; 

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  servo.attach(3);
  SPI.begin();
  rfid.PCD_Init();
  unlockDoor();
}

void loop() {
  lcd.setCursor(1, 0);
  lcd.print("Scan Kartu");

  if (!rfid.PICC_IsNewCardPresent())
    return;
  if (!rfid.PICC_ReadCardSerial())
    return;

  lastResponseTime = millis(); // Memperbarui waktu respons terakhir

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Scanning");
  Serial.print("UID yang dipindai: ");
  String scannedUID = "";
  for (byte i = 0; i < rfid.uid.size; i++) {
    lcd.print(".");
    String hex = String(rfid.uid.uidByte[i], HEX);
    if (hex.length() == 1) {
      hex = "0" + hex;
    }
    scannedUID += hex;
    delay(300);
  }
  scannedUID.toUpperCase();
  scannedUID.replace(" ", "");

  bool uidAllowed = false;
  for (int i = 0; i < sizeof(allowedUIDs) / sizeof(allowedUIDs[0]); i++) {
    if (scannedUID == allowedUIDs[i]) {
      uidAllowed = true;
      break;
    }
  }

  if (uidAllowed) {
    if (doorLocked) {
      unlockDoor();
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Pintu terbuka");
      delay(10000); // Tunggu selama 5 detik
      lcd.clear();
      lockDoor(); // Setelah 5 detik, kunci pintu kembali
      lcd.setCursor(0, 0);
      lcd.print("Pintu tertutup");
      delay(1500);
      lcd.clear();
    } else {
      lockDoor();
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Pintu terkunci");
      delay(1500);
      lcd.clear();
    }
  } else {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Kartu tidak valid!");
    delay(1500);
    lcd.clear();
  }
}

void unlockDoor() {
  servo.write(60);
  doorLocked = false;
}

void lockDoor() {
  servo.write(160);
  doorLocked = true;
}
#include <LiquidCrystal_I2C.h>
#include <SPI.h>
#include <MFRC522.h>

#define RST_PIN 9
#define SS_PIN  10
byte readCard[4];
byte a = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2);
MFRC522 mfrc522(SS_PIN, RST_PIN);

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  while (!Serial);
  SPI.begin();
  mfrc522.PCD_Init();
  delay(4);
  mfrc522.PCD_DumpVersionToSerial();
  lcd.setCursor(2, 0);
  lcd.print("scan kartu");
}

void loop() {
  if ( ! mfrc522.PICC_IsNewCardPresent()) {
    return 0;
  }
  if ( ! mfrc522.PICC_ReadCardSerial()) {
    return 0;
  }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("UID Kartu");
  a = 0;
  Serial.println(F("Scanned PICC's UID:"));
  for ( uint8_t i = 0; i < 4; i++) {  //
    readCard[i] = mfrc522.uid.uidByte[i];
    Serial.print(readCard[i], HEX);
    Serial.print(" ");
    lcd.setCursor(a, 1);
    lcd.print(readCard[i], HEX);
    lcd.print(" ");
    delay(500);
    a += 3;
  }
  Serial.println("");
  mfrc522.PICC_HaltA();
  return 1;
}