Good day all,

I am trying to connect a range of RC522 RFID modules to an IO expander MCP23S17 run by a RPI. I am having trouble finding information regarding editing the MFRC522.py modules to allow a change of CS pin. Has anyone attempted or know of reading materials that can point me in the right direction?


To clarify: I am looking for information regarding switching between RC522 modules one at a time connected to IO expander MCP23S17. So will be calling a IO pin from MCP23S17 as a designated CS pin for the RC522 module and reading a RFID tag on a selected RFID reader. The way of which I can do this, I require some insights. Many thanks


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