Have you tried this? I am about to try it but not sure how to proceed; dont want to burn components not sure if miso can be reassigned; Here is RFID schema: http://3.bp.blogspot.com/-93KdBuWD1g8/UdEamKhesBI/AAAAAAAADdg/AtIY45vsAgs/s715/Diagrama_Conexion.jpeg Here is Pi Model B+ http://www.raspberryp...