Mesa card emulation in microcontroller

If I have got things right, there appears to be a synthesised mcu core in the Mesa implementation.

I was originally going to use the 7i92 with a common BOB, but then I got a 7i76, then a 7i73 and 7i83. Probably way more than I need, but meh.

There is GRBL Advanced that runs on a STM32F411 Nucleo Board. Which looks interesting if you swing that way.
github.com/Schildkroet/GRBL-Advanced

At the UDP data rate, the microcontroller should be capable of keeping up, actually, you would probably have to slow it down to minimise the risk of MAC collisions, and I think the messages would be coming in too fast for linuxcnc to process

Thanks, I'll take a look

i do not know if is this what you are looking for..

github.com/dlhenke/linuxcnc-esp32

Thanks for the link, looks promising

The STMBL Servo drives also act like Mesa devices. In that case they are a Mesa Smart-serial device, and use an STM32 microcontroller.

This means that you can send motor positions as a floating-point number on an all-digital link, and get the actual position back in to HAL in the same way.