/**
 * ...
 *
 * Author: Alexander Popov
 * License: Unlicense
 */

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

#define SS_PIN  7
#define RST_PIN 9

MFRC522 rfid(SS_PIN, RST_PIN);

void setup() {
  Serial.begin(9600);
  SPI.begin();
  rfid.PCD_Init();

  Serial.println("Tap RFID/NFC Tag on reader.");
}

void loop() {
  // new tag is available
  if (rfid.PICC_IsNewCardPresent()) {
    // NUID has been readed
    if (rfid.PICC_ReadCardSerial()) {
      MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);

      Serial.print("RFID/NFC Tag Type: ");
      Serial.println(rfid.PICC_GetTypeName(piccType));

      // print NUID in Serial Monitor in the hex format
      Serial.print("UID:");
      for (int i = 0; i < rfid.uid.size; i++) {
        Serial.print(rfid.uid.uidByte[i] < 0x10 ? " 0" : " ");
        Serial.print(rfid.uid.uidByte[i], HEX);
      }
      Serial.println();

      rfid.PICC_HaltA(); // halt PICC
      rfid.PCD_StopCrypto1(); // stop encryption on PCD
    }
  }
}