Arduino + RFID-RC522
* Pin layout should be as follows: * Signal Pin Pin Pin * Arduino Uno Arduino Mega MFRC522 board * ------------------------------------------------------------ * Reset 9 5 RST * SPI SS 10 53 SS * SPI MOSI 11 51 MOSI * SPI MISO 12 50 MISO * SPI SCK 13 52 SCK