Hi,
I'm using RC-522 RFID with Arduino MEGA. My project include 9 RFIDs which are connected with breadboard. It worked perfectly fine (at least 6 months) but in recent days, sometimes one or two cards don't response when there is a tag on them. I tried to change the RFID to new RFID but it didn't helped.
I wondered if there is a more stable component than RC-522 RFID since in my experience this component was destroyed after several months.
Thank you,