recently I've been trying to get around reading the rfid readers input but can't figure things out.
Somehow I found this post: https://docs.onion.io/omega2-docs/uart1.html and similar to suggestions reading the tx,rx from terminal, I tried cat /dev/ttyS1, swiped cards on antena but couldn't get anything on terminal flow.
But really it seems to be a hard task to accomplish, back in days using arduino uno/clones and a rdm6300 through this tutorial: http://tronixstuff.com/2013/11/19/arduino-tutorials-chapter-15-rfid/
I was able to read the cards in hex with softserial library.
If anyone could guide me/us on how to read the rfid modules it would be really great.