MFRC522 not working on RPi 4 about mfrc522-rpi

[mgoeller]

Finally got it to work. Unimaginable but the cables were the problem! Really strange that the same cables and the same MFRC522 module were working with a RPi3 but not a 4. Changed the cables and suddenly all worked. Thank you!

[firsttris]

could you update the dependency "rpio": "^1.0.13" to 1.2.2 and check if it works ?

[firsttris]

@mgoeller could you check?

[mgoeller]

Thank you, the RPi is in another home. I tried to update the dependency, now the error doesnt show anymore but the card reader is still not working. How can I debug?

[firsttris]

generally by running the examples https://github.com/firsttris/mfrc522-rpi/tree/master/test. i mean you could add some console.log here and there. that would be a very easy approach for debugging.