I need to connect a RFID reader, which protocol is Wiegand. I have connected two wires from reader to my input GPIO 6 and7.
The thing is that I cannot control changes from high level to low, I suppose, due to its speed.
I think that the best way could be defining these GPIO as IRQ. ¿Is it possible? ¿How can I do that? ¿Is there any documentation?
Thank you very much.