Good morning, I want to implement a project to "command" more arduino's yun from a UDOO board. The udoo board must have a rfid module. When I pass the RFID card to the reader, the UDOO must be able to read from an internal database if the card is enabled and then communicate to one (or more) Arduino Yun to activate a relay via the rest services internal to the Arduino. I want to know wich rfid module is compatible with UDOO, and how UDOO comunicate with that rfid module.In my experience with arduino i have a "driver" written in C++ wich communicate directly from arduino to rfid module. It's the same with UDOO, or exist other type of "comunication"?