Hello Allard,
I am a CW-only ham, so your 1.27.7 sketch made me love the BITX40.
Today I tried to upload the 1.28 upgrade but, surprisingly, it does not sense the key and transmit CW any more.
Moreover, the command-driven menus are not working as before.
I came back to the 1.27.7 version and now all is working as it should.
Did I miss something?
Thank you so much, best 72
Joe, IZ0WIT
Jep