Ok I have something that "works" but only about 25% of the time pairing-wise.
Sometimes it pairs easy, sometimes not at all.
The reset button sometimes triggers it, sometimes you have to yank the J5 jumper and put back on.
To me it feels like something is getting stored and not flushed out either at the hub or card end.
Learnt a lot though and will eventually get there.
Once you can get it joined works well and is stable, just need to figure out what triggers that.
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