Why We Built It Drag stepper control into 2025—no more breakout boards or rats-nest wiring. This board powers, drives, and programs a motor from a single compact module. Inside the Magic ESP32-WROOM-32 MCU, DRV8825 driver with selectable microstepping, CH340C USB–UART bridge, AMS1117-3.3 regulator, and BSS138 auto-boot circuitry all tucked into the NEMA17 footprint. One-Wire Hookup Feed +5 V through USB‑C or a JST plug, snap the four-pin motor harness, press the IO0 button if you feel nostalgic—otherwise the on-board FETs auto-reset for you. Modes in a Flash Three solder jumpers flip DRV8825 MODE0..2 so you can jump from full-step torque to silky 1/32 microsteps in seconds. Probe Pads for the Curious STEP and DIR test pads plus AUX UART header mean you can scope, sniff, or hijack signals without rework. Firmware Friendly ESP32 IO4/IO5 carry STEP/DIR, UART0 is on USB‑C and the header, LEDs on IO12/IO13 make status blinks a one-line job.