@krso 在 M5stack STEP 3D files 中说：
It's CAD models. You know how to program arduino, but not how to use Google?
it is really wide used and known data exchange form.
Really, never heard of it before, I only know of DXF, stl and gcode.
In fact I'm pretty sure that most people have not heard of the step format and so can't be bothered to search or try to help out on a foreign file format.
In fact, the M5's own cad module is configured for gcode.
The point is that you should have been more informative in your first post.