I just assembled the Bittle kit with NyBoard V1_0.
Installed the latest Arduino 1.8.16
Using the latest OpenCat build.
I was able upload a few basic test programs and was able to calibrate the legs.
The issue I'm having is executing basic commands such as "ksit" or "kwkF". In the serial comm. window, I see the "k" command was sent, but the remainder was not recognized or acted upon. Other commands do work, such as "m0 30"... Any thoughts?