mfrc522 UID - converting to dec

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byte mfrc522_uid_uidByte[4] = {0x35, 0xCB, 0xF8, 0xC2 };

char uidString[9]; // 4 x 2 chars for the 4 bytes + trailing '\0'

// store on 2 char the Hex represnetation of byte v
// adds a trailing '\0'
// so b should point to an array with at least 3 bytes available to contain the representation
void storeHexRepresentation(char *b, const byte v)
{
  if (v <= 0xF) {
    *b = '0';
    b++;
  }
  itoa(v, b, 16); // http://www.cplusplus.com/reference/cstdlib/itoa/
}

void setup() {
  Serial.begin(115200);
  for (byte i = 0; i < 4; i++) storeHexRepresentation(&uidString[2 * i], mfrc522_uid_uidByte[i]);

  Serial.print(F("\nYour string is:"));
  Serial.println(uidString);

}

void loop() {}