So I had my Arduino Due based MMDVM up and running on the hill top and wanted to upload new firmware to it without driving 30km up to the repeater site. The Raspberry Pi3 it is connected to is completely headless, no desktop, no vnc … only ssh. I tried stuff like forwarding the serial port over TCP, but no joy.
Introduction I came across a Motorola R100 repeater, those were very capable low to mid duty analogue repeaters in the mid 80s up to the 21st century, yet some of them are still in commercial use! What follows is more or less a memo on how I converted it for digital (Dstar and DMR) use and eventually analog/digital use.