Hi Grant
No, I have chosen to use Bart Dring’s 6pack controller and fluidNC which is 32bit (More io’s more capability) rather than 8 bit.
I’m happy to say that I’ve had a Sienci Longmill CNC with the Arduino Uno 8 bit Controller for some years now and will continue to do so along with my trials.
Late in 2021 beginning of 2022 I began experimenting. .I published some stuff in the “Want a Modification” section of the forum at that time.
In my experiment I simply replaced the Arduino with a more flexible ESP-32 microcontroller. I wanted to have a rotary axis, spindle etc etc. Additionally, I wanted to test this using my gsender.
As I stated I chose the 6 pack controller (which uses an espressif esp32 Wroom chip )and FluidNC. This microcontroller has wifi, bluetooth, tablet support, smart device, sd card support.
Anyway the long and the short of it is FluidNC supports grbl ( Home · gnea/grbl Wiki · GitHub)
All that was necessary was to swap out one controller for another controller, since FluidNC is backward compatible with previous versions of grbl. Sienci gsender functions correctly. with the 6pack controller and FluidNC.
Andrew