RFID-RC522 not reading all cards

0
votes

I have used Arduino UNO with RFID-RC522

I'm using https://github.com/miguelbalboa/rfid library

Wiring : 3.3 V -> 3.3 V RST -> 9 GND -> GND

MISO -> 12 MOSI -> 11 SCK -> 13 SDA -> 10

Only one card is working which came with RC-522. I have purchased 10 other cards. None of these working. Please advice.

1
arduinorfid

1 Answers

0
votes

Be aware that there are various RFID standards which use different protocols and/or frequencies. If you have a card that is not compatible with your reader it will not work.

RC522 operates at 13.56MHz. If you purchased 125kHz e.g. transponders they cannot communicate!