Hi,
Thanks for your inquiry.
Please refer to Arduino BNO055 page at https://learn.adafruit.com/adafruit-bno055-absolute-orientation-sensor/arduino-code?view=all for more information. If you can use STM32 MCU to talk to the BNO055 breakout board successfully with the correct chip ID value and sensor fusion results, then you can go back to your schematics to fix the issue.
Thanks.
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