Mesa 7c80 Smart Serial

Thanks for checking.
I've just swapped out the transceiver and that got me a bit further in that hostmot2 found the device but reported timeout errors during the discovery phase. I managed to remove those by disabling the output that the stm32 was writing to the other serial port.

I suspect I'm going to have to ditch the Arduino framework and get a bit closer to the metal to get this working reliably, but at least I know the hardware works now.

Thanks again for you help.

Regards
Russell

Yes, you need close to real time response from a sserial remote.
What's more, the interface is generous during setup and discovery
(1 ms timeout) but during process data transfers it only allows the
nominal (measured) response time + 20 usec or it times out the transaction