I have a RFID RC522 board that was working perfectly, until by mistake I tried to write it with a phone as if it was a RFID tag and now it stopped working, in the way that its led still turns on but it's not recognised by the code (it says firmware version 0x0).
I guess writing it fried the chip, but is there any way to check if it's actually fried or just a software problem?
Best Answer
Because MFRC522 does not support Card emulation mode, When you put both PCD chips in writer mode across each other(Phone and RC522), generated field by the phone may damaged the RC522, but any way there is a version register in MFRC522 chip, try to read this register,if it was not returned successfully,means your rc522 is damaged.