I've recently got the MFRC522 RFID reader up and running with the arduino uno using some example sketches from github (https://github.com/miguelbalboa/rfid)
I can read the contents of the blank card which came with the reader fine. However the original purpose of this project was to make a spare copy of the RFID card I use for access to my side gate.
However when I scan that card using the DumpInfo.ino sketch included in the examples from that link, I just get the error message "PCD_Authenticate() failed: Timeout in communication."
I'm still relatively new to this sort of project so does anyone have any tips what that exactly means and if it will be possible for me to create a copy of my card at all?