CircuitPython class to access the MFRC522 RFID reader

Based on the wendlers/micropython-mfrc522 MicroPython library.

Basic class to access RFID readers of the type MFRC522. This is basically a re-write of this Python port for the MFRC522. I tried to strip things down and make them more "pythonic" so the result is small enough to run on CircuitPython boards.

Put the modules mfrc522.py, examples/read.py, examples/write.py to the root of the flash FS on your board.

I used the following pins for my setup:

Now enter the REPL you could run one of the two examples:

For detecting, authenticating and reading from a card:

import read
read.do_read()

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 write
write.do_write()

This will wait for a MifareClassic 1k card. As soon the card is detected, it is authenticated, and 16 bytes written to address 0x08.