Like others, I had problems with uBitx keying, which is why I was happy to see confirmation of Jim's hardware solution. I'm adding a daughter board with a SOTABEAMS CW audio filter,? 2N7000 based anti-pop hardware and space for a keying adapter or other add on. This thread gave me pause to rethink what to implement for keying.
I'm also looking forward to seeing KD8CEC's sketch. I installed the ever improving versions of Allard's code on my Bitx40. Allard did a great job of incorporating many code snippets and ideas from the community. I hope that we have the same synergy with uBitx code.
??? Bob, KD8CGH
Bob Benedict, KD8CGH