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uStepper Electronics
uStepper S32 Controller is a compact, all-in-one motion control board that combines a powerful processor, stepper driver, and rotary encoder into a single unit. Designed to mount directly on the back of a NEMA17 stepper motor, it greatly reduces wiring complexity and the external electronics required to control a stepper. With an additional mount, it can also be used on NEMA23 motors.
The onboard STM32F401 ARM Cortex-M4 processor is Arduino compatible, allowing programs to be developed directly in the Arduino IDE. An official uStepper Arduino library is provided to simplify motor control and integration into custom projects.
A built-in rotary encoder enables closed-loop operation by tracking the absolute position of the stepper motor, ensuring precise and reliable motion. For additional flexibility, 22 input/output pins are broken out on the board, making it easy to connect custom electronics.
Expansion options such as the WiFi Shield and Prototyping Shield are available to extend functionality further, making the uStepper S32 a powerful yet accessible platform for both prototyping and production use.