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:
| Signal | GPIO ESP8266 | GPIO WiPy | Note |
|---|---|---|---|
| sck | 0 | "GP14" | |
| mosi | 2 | "GP16" | |
| miso | 4 | "GP15" | |
| rst | 5 | "GP22" | |
| cs | 14 | "GP14" | Labeled SDA on most RFID-RC522 boards |
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.