Open-source firmware now runs on V3

Thanks to Randy Stiver who sent me a V3 I could test on, I was able to add support for the new LCD to the open-source firmware.

The firmware must be built specifically for the V3 by using “make NANOV3=1” where the instructions say just “make”. Maybe some day the firmware can be improved to detect the right LCD code automatically. And support the 2MB memory… Happy hacking! :slight_smile: