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

#define czas_trwania 5000
const byte UID1[] = {0xC8, 0x94, 0xC0, 0x59};
const byte UID2[] = {0x4D, 0x56, 0xFD, 0x29};
const byte UID3[] = {0x4D, 0x56, 0xFD, 0x29};
const byte UID4[] = {0x7F, 0xC9, 0xBF, 0x59};
const byte UID5[] = {0xDA, 0x0D, 0xBF, 0x59};
const byte UID6[] = {0x27, 0x11, 0xBF, 0x59};
boolean karta1 = false;
boolean karta2 = false;
boolean karta3 = false;
boolean karta4 = false;
boolean karta5 = false;
boolean karta6 = false;

MFRC522 rfid(10, 9);
MFRC522::MIFARE_Key key;

boolean stan = false;
unsigned long czas;

void setup() {
  Serial.begin(9600);
  SPI.begin();
  rfid.PCD_Init();
  pinMode(6, OUTPUT);
}

void loop() {
  if (rfid.PICC_IsNewCardPresent() && rfid.PICC_ReadCardSerial())
  {
    if (rfid.uid.uidByte[0] == UID1[0] && 
        rfid.uid.uidByte[1] == UID1[1] &&
        rfid.uid.uidByte[2] == UID1[2] &&
        rfid.uid.uidByte[3] == UID1[3])
    { karta1=true;
      if (rfid.uid.uidByte[0] == UID2[0] && 
          rfid.uid.uidByte[1] == UID2[1] &&
          rfid.uid.uidByte[2] == UID2[2] &&
          rfid.uid.uidByte[3] == UID2[3])
          { karta2 = true;
          if (karta1==true&&karta2==true)
      {      
      Serial.println("Poprawny");
      stan = true;
      czas = millis() + czas_trwania;
          }
          }
       } else
    {
      karta1=false;
      karta2=false;
      Serial.println("Niepoprawny");
      stan = false;
    }
    rfid.PICC_HaltA();
    rfid.PCD_StopCrypto1();
  }

  if (stan && czas < millis())
    stan = false;

  digitalWrite(2, stan)  ;
}