(Micro)Python class to access the MFRC522 RFID reader
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 Micropython boards. I tried the class so far on the ESP8266 and the WiPy.
Put the modules mfrc522.py, examples/read.py, examples/write.py to the root of the flash FS on your board.
For the ESP8266 there are multiple solutions to do that. E.g. use the
WebREPL file transfer, or mpfshell.
For ESP32 I use ampy to transfer the files.
I used the following pins for my setup:
| Signal | GPIO ESP8266 | GPIO WiPy | ESP32 |
|---|---|---|---|
| sck | 0 | "GP14" | 18 |
| mosi | 2 | "GP16" | 23 |
| miso | 4 | "GP15" | 19 |
| rst | 5 | "GP22" | 4 |
| cs | 14 | "GP14" | 2 |
Now enter the REPL you could run one of the two exmaples:
For detecting, authenticating and reading from a card:
import read
cs_pin = 2
reader_number = 0
read.do_read(cs_pin, reader_number)
This way you can use multiple readers. Just make sure to assign a new cs_pin. The other pins can be shared.
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.