This is good: I reached out to Digital Logic to ask them whether they could make the firmware better for my silly purpose - not hoping much, since it’s not exactly a mainstream use case - and here’s the answer I got today:
My R&D was very quick to act.
They released a new firmware version v5.0.51
[…]
My colleagues also added commands for turning the RF field ON (RF_ON) and OFF (RF_OFF).
Ain’t that great or what!
I’ll flash the new firmware in my uFR reader tomorrow and play with the new commands. If they work well, it’ll be the ideal hardware for my blinkie bracelet project. That’s for after I get my dead flexNExT replaced of course 