Been a while on this thread, but thought I'd give it a shot... I have a similar application where I'd like to host a USB NFC card reader via a Teensy 4.1 host port. Were you able to get this going, and is there any code released? Thank you!
It has been awhile and KurtE was very helpful. I had to put this on the back burner until our season was over, and am now looking at this again. I was able to detect reading a Card, and trigger a relay. Our first version required nothing more...