This has been in the works for some time, but I have a working proof of concept now. There are two shields (RPUftdi* and RPUadpt**) and two microcontroller boards (Irrigate7 and an Uno clone), they share the serial interface over the CAT5 cable to a host UART, which is on the RPUftdi shield. The RPU…

RS-422 plus RS-485 over CAT5 (RPU_BUS) remote bootload proof of concept.

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