//홈페이지: www.daduino.co.kr

//이메일: daduino@daduino.co.kr

/*

핀 연결

RST/Reset   RST          9         

SPI SS      SDA(SS)      10

SPI MOSI    MOSI         11

SPI MISO    MISO         12

SPI SCK     SCK          13

*/

#include <SPI.h>

#include <MFRC522.h>

constexpr uint8_t RST_PIN = 9;     // Configurable, see typical pin layout above

constexpr uint8_t SS_PIN = 10;     // Configurable, see typical pin layout above

MFRC522 rfid(SS_PIN, RST_PIN); // Instance of the class

MFRC522::MIFARE_Key key;

// Init array that will store new NUID

byte nuidPICC[4];

void setup() {

  Serial.begin(9600);

  SPI.begin(); // Init SPI bus

  rfid.PCD_Init(); // Init MFRC522

  for (byte i = 0; i < 6; i++) {

    key.keyByte[i] = 0xFF;

  }

  Serial.println(F("This code scan the MIFARE Classsic NUID."));

  Serial.print(F("Using the following key:"));

  //printHex(key.keyByte, MFRC522::MF_KEY_SIZE);

}

void loop() {

  // Look for new cards

  if (rfid.PICC_IsNewCardPresent())

  {

      // Verify if the NUID has been readed

      if (rfid.PICC_ReadCardSerial())

      {

          Serial.print("value = ");

          Serial.print(rfid.uid.uidByte[0],HEX);

          Serial.print(rfid.uid.uidByte[1],HEX);

          Serial.print(rfid.uid.uidByte[2],HEX);

          Serial.print(rfid.uid.uidByte[3],HEX);

          Serial.println();

          // Halt PICC

          rfid.PICC_HaltA();

          // Stop encryption on PCD

          rfid.PCD_StopCrypto1();

      }

  }

}