Hi Dennis I made that post just to share my experience since I have been struggling for more than a month. You are right about the voltages, but the data sheet if for BNO055 not for the adafruit board that is plugged to. See this: https://learn.adafruit.com/adafruit-bno055-absolute-orientation-sensor/pinouts even it says vin (3.3-5 V) but 3.3 will not turn on the sensors This is my experience Thank you
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