M5Stack AtomS3R
ESP32-S3 controller, 128 × 128 display and BMI270 IMU
DIY CUBE // REVISION R1
This guide documents the small reference cube that already runs workouts, guided breathing and meditation offline. Public files are being prepared and will only be marked ready after an independent rebuild.
[01] BILL OF MATERIALS
ESP32-S3 controller, 128 × 128 display and BMI270 IMU
200 mAh LiPo base for the untethered reference build
Power, flashing and serial diagnostics
Serviceable two-part printed shell
[02] HAPPY PATH
Use the exact tested board and battery base for your first build. Substitutes will be listed only after validation.
Download the versioned STL and source CAD, then follow the documented orientation and tolerance checks.
Seat the board without forcing connectors. Keep the USB port, front button and display accessible.
Install the signed R1 binary, verify its checksum and use the recovery instructions if flashing is interrupted.
Grant Android Bluetooth permissions, scan for the cube and atomically activate your first program.
Confirm one deliberate quarter turn, upright text, correct targets, rejected small movements and recoverable undo.
[03] FIVE-MINUTE ACCEPTANCE TEST
R1 DOWNLOAD PACKAGE
The enclosure, tagged firmware binary, checksums and illustrated assembly guide will appear here after the independent rebuild. No unverified download is being published early.