Gearchange help controlling a BLDC motor

I don't have any system to tell the control which belt speed it is in and didn't plan on adding one because I seldom use low range.

The way I hoped to do it was similar to a toolchange in Linux where there was maybe a pop-up if a speed below 1300RPM is requested and it waits until I click ok to continue. I know that is basically what Pathpilot does for Tormach and it is LinuxCNC based. I just don't know how they accomplish it

you also need a parameter VAR at the startup loaded to tell the last known state
but it is as no feedback always a problem of the user

and it needs not to be that hard coded only the use of the mux shoudt give you a clear value

You can set up the message component to ask for a gear change.
Use wcomp to set a bit that is true for a range from (say) 5 rpm to 500, and then use the "over" to set a bit to ask for high gear.

linuxcnc.org/docs/2.7/html/man/man9/wcomp.9.html
linuxcnc.org/docs/2.7/html/man/man9/message.9.html

(It's probably worth having a quick scan through all the HAL components at: linuxcnc.org/docs/2.7/html/ ("Realtime components and kernel modules")