Ian, I'm marveling at your code! Fantastic.
I had seen your note about 5 hex files being available and I couldn't find them.
I was having problems with the source and couldn't upload them. Hence the look for your hex files.
The problem was the nano bootloader! Choosing the old option fixed things! My 20x4 I2c works fine.
Now I can enjoy you work again and add minor options to it. I like to P&M stuff (plagiarize & modify). :)
73, Bo W4GHV since '54
