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    BMP390 configuration error when setting OSR

    BMP390 configuration error when setting OSR

    Kisle
    Occasional Visitor

    Hi all,

    I am using a BMP390 and measuring works fine in standard configuration. I can switch to normal mode and fetch proper measurements.

    However, as soon as I try to set the OSR register the BMP390 goes into an "configuration error" state and switches to sleep mode and then i am unable to activate normal mode again. A soft reset cmd will restore the defaults and fixes this. However OSR is also reset then.

    The datasheet didnt really clarify to me what is happening exactly. I tried different OSR configurations, I dont see what could be wrong with any of those. Are there any configurations that are not allowed or have to be set together?

    Best regards

    Mark

    2 REPLIES 2

    Kisle
    Occasional Visitor

    Ok it seems when setting oversampling then the odr_sel has to be configured accordingly. 2x oversamping requires 2x prescaler on odr_sel.

    BSTRobin
    Community Moderator
    Community Moderator

    Hi Kisle,

    Thank for your inquiry.
    You can set BMP390 sensor configuration according the description in data sheet.

    2024-08-12_18h42_11.png

    You can also refer to official BMP390 example code: https://github.com/boschsensortec/BMP3_SensorAPI/tree/master/examples

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