The solution is named Ethersweep, and is a small PCB stack that sits on the rear of the common NEMA17-format stepper motor ... with the Arduino software stack deployed, making uploading firmware ...

[Andreas] has created this tutorial ... an Arduino here on Hackaday. The rationale behind this is not often explained. [Andreas] connects a common low-cost 28BYJ-48 geared stepper motor with ...