Day: March 8, 2018

  • Fixed: RC522 RFID reader not reading (some) cards (Part 1)

    Fixed: RC522 RFID reader not reading (some) cards (Part 1)

    Some of the RC-522 RFID card reader modules that can be bought on ebay / aliexpress have a problem: they do not read all (types of) cards they should be able to read. In this blog post I want to explain how to recognize these faulty readers and how to fix them. (There is a…