There is something that took a while for me and others to understand and accept is that the BITX40 is a lower single side band phone mode transceiver. Making it do anything else is impractical and maybe even be impossible. The functions in the raduino code are leftover from the BITX20 which is upper sideband phone mode transceiver. Which can do digital modes because digital modes are on USB. CW on sideband might be legal somewhere, not in U.S.
Getting the BITX40 to do something else other than simple phone mode on 40 meters would require you to rebuild it in a different way. Such as the row of four toroids is a passband filter for LSB. You would need to change them and some other parts to work on USB. And then not on LSB anymore. Not just change it in the code.?Rebuilding it is doable. But if you can do that, then you can make it that way to begin with.
If the uBITX is a buyable product, it might be able to do the digital stuff so many of us are wanting to do. I am aware that I might be wrong about something I said here. And I am sure someone here could say it better.
