I doubt it’s the RFID reader. That thing is doing it’s job. In my opinion the problem lies in the Qwiic board and it’s dodgy firmware. The whole concept that the thing keeps reading tags and pushing data without any way of controlling it. And then probably overflows and starts leading it’s own life. And it looks like I’m not the first one encoutering similar problems: https://community.sparkfun.com/t/sparkfun-rfid-qwiic-reader-returns-the-same-rfid-tag-value-over-and-over-after-about-12-scans/60169
To be honest, I went this route because I worked on another RFID project that used the ultra-cheap MFRC522 readers. I thought those were a hassle to get to work more or less reliably. I had a good experience in the past using the USB RFID reader in combination with ID_12LA’s, so I was hoping the Qwiic readers would be the same. Sadly, not so.
I think I’ll just have to reset the readers pre-emptively and hope things will work somewhat reliably…
BTW: 5 Qwiic RFID’s, 5 ID_3LA’s, a Qwiic Mux breakout and some Qwiic cables add up to well over €300,- where I live. So yeah, maybe I was expecting a bit more.