Request support for board uStepper S based stepper driver and encoder

[smukkejohan]

Please add support for uStepper S made by ON Development (https://www.ustepper.com/)

uStepper S is an Arduino compatible board, with integrated stepper driver and 16-bit rotary encoder, mounted directly on the back of a NEMA 17 size stepper motor.

• Uses a 328PB MCU
• Installation instructions for use with Arduino IDE here as well as all relevant src code https://github.com/uStepper/uStepperS

[maxgerhardt]

Can be made to work already by adding the variant folder and board definition to the project: See forum and project.

[ivankravets]

Thanks, @maxgerhardt, for the provided solution!

[maxgerhardt]

This however slightly outdated, the core has moved on, and has also modified libraries/, which now would need a new core package to integrate it correctly, instead of my solution of just copying the variant folder (+ new board JSON).