M5ATOMS3R IMU Examples

Do not use this unit in situations involving safety to life.

9DoF test

3D compass
hsi_S and ehou2025_S

Orientation

• BMI270 I2C address = 0x68
• Tohoku elder sister is not included.

PlatformIO only (not worked Arduino-IDE)

Copy example code to src folder and rename main.cpp

• Modifed bmm150_defs.h using floating point

/******************************************************************************/
/*! @name        Compiler switch macros Definitions                */
/******************************************************************************/
#define BMM150_USE_FLOATING_POINT //OK

#ifndef BMM150_USE_FLOATING_POINT /*< Check if floating point (using BMM150_USE_FLOATING_POINT) is enabled */
#ifndef BMM150_USE_FIXED_POINT /*< If floating point is not enabled then enable BMM150_USE_FIXED_POINT */
#define BMM150_USE_FIXED_POINT
#endif
#endif

Serial Monitor

To keep the display speed, use M5.Log.Printf instead of Serial or USBSerial

Caribration

Press BTN-A(display). And flip random direction.

References

https://github.com/boschsensortec/BMI270_SensorDriver
https://github.com/boschsensortec/BMM150_SensorDriver
https://github.com/m5stack/M5Unified
https://x-io.co.uk/open-source-imu-and-ahrs-algorithms/
picture data converter: https://lang-ship.com/blog/

License

• 9PEO0xNd - MIT
• M5Unified - MIT by M5Stack
• BMI270 BSD-3-Clause license by BoschSensortec
• BMM150 BSD-3-Clause license by BoschSensortec

History

2025/Jan/31 Initial release