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    Unresponsive BNO055 on I²C

    nmatringe
    New Poster

    Unresponsive BNO055 on I²C

    Hello

    We've designed a board with various chips on an  I²C bus and the only one that doesn't respond is the BNO055. Scanning the bus shows only 3 devices when there should be 4. I've checked that the reset and bootload pins are correctly pulled up and now I don't know what to do next.

    I've had two boards assembled and both exhibit the same behaviour. Maybe it's only that the sensors are dead but that would be quite unlucky.

    I attach a screenshot of the schematics & PCB design. Nothing fancy but maybe I made a mistake despite double and triple checking.

    Thanks
    Nicolas

    Tags (2)
    1 REPLY 1
    FAE_CA1
    Community Moderator

    Re: Unresponsive BNO055 on I²C

    Hi,

    Thanks for your inquiry. Please check the app note https://www.bosch-sensortec.com/media/boschsensortec/downloads/application_notes_1/bst-bno055-an007.... for more informaiton.

    Please check the BNO055 I2C 7-bit slave address in your code and make sure that the MCU you are using supports I2C clock streching which is mentioned on page 91 of BNO055 datasheet.

    Thanks.

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