Adafruit 9DOF
- https://learn.adafruit.com/adafruit-bno055-absolute-orientation-sensor/overview
- https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/installing-circuitpython-on-raspberry-pi
- https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/i2c-clock-stretching
- https://github.com/adafruit/Adafruit_BNO055
- https://github.com/adafruit/Adafruit_Python_BNO055
- https://github.com/adafruit/Adafruit_CircuitPython_BNO055
- https://www.instructables.com/id/Simple-Manual-Magnetometer-Calibration/
- https://www.instructables.com/id/Automatic-Magnetometer-Calibration/
9DOF data sheet
gyro xyz = FLU
BST_BNO055_DS000_14.pdfNice paper to estimate orientation, some on 28
1704.06053.pdfMadgwick approach: http://x-io.co.uk/open-source-imu-and-ahrs-algorithms/
madgwick_internal_report.pdf