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by o1grossman
Fri Nov 12, 2021 1:01 am
Forum: General Discussion
Topic: Problem with RC522 RFID read/write module
Replies: 1
Views: 2571

Problem with RC522 RFID read/write module

I had the RC522 read/write module working well with a LOLIN32 two weeks back. I'm running the "Dumpinfo" example code with modifications for my pinout. I tried today and now I'm getting the error message: "WARNING: Communication failure, is the MFRC522 properly connected?" My connections are hard-wi...