Hi Martin,
I've already discussed this issue a month ago with a few other forum members.
/g/nanovna-users/message/2113 It appears that the switches are scanned and the touchscreen is interrupt driven.
Although there is debounce in the F/W, the button presses are not always picked-up.
I had also installed buttons on my unit - see the Hacks & Mods folder in FILES for my writeup.
I guess we'll have to ask for voice control..... ;-)
73...Larry
