I´m not able to adjust the slew rate via indi control panel and also not with kstars Mount control.
In indi-control panel I can see "Setting Max Slew Rate to (1...9)", but this is not adjusted in Onstep himself.
The only thing that works is, when I use the Onstep App and adjust the speed at Guide/Focus there.
RPI4 with Astroberry and SSD, the Onstep MiniPCB2 (Teensy 3.2)
SX-CCD and the UPB Powerbox.
KStars for Windows 3.4.1 on my Win 10 Laptop
Both connected via GBit Lan
No error-messages at all.