You are watching a fork from the original code. In this fork I added a class which simplifies access with automated general processes. Then, import from it the class "RFID". When using it, if you use ...

This will wait for a MifareClassic 1k card. As soon the card is detected, it is authenticated, and 16 bytes are read from address 0x08. For detecting, authenticating and writing to a card: import ...