Softmodem TNC built on the same board we're using

[BrucePerens]

See https://github.com/danak6jq/ESP-TNC

Dana referred to this as a "hold my beer" project, but says the modem works pretty well. It needs to be combined with Generic Main from Rigcontrol, and taught enough APRS so that it can forward packets to aprs.fi .

Actually, he built it on version 2.1 of the board we're using, if you got yours from me or it has a relatively recent production date, it's version 2.2 and has a different audio chip. I will get a Version 2.2 board to Dana for testing.