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    BME280 and BMI088 on same SPI bus don't play nice?

    BME280 and BMI088 on same SPI bus don't play nice?

    lvdlvd
    Occasional Visitor

    I have a BME280 and a BMI088 share a SPI bus with three separate nCSB signals for the BME280 and the BMI088 Accel/Gyro.  the BMI088 'PS' is tied low to select SPI on the gyro.  before talking to either BME280 or the Accel i toggle the nCSB signals low-high-low-high to force them all both to SPI too. (cf the datasheets).

    When i connect only the BMI088 or the BME280, everyting works nicely.  when i connect them together, either the Gyro or the BME refuses to get configured properly, depending on which i configure first.  Is this expected?

    1 REPLY 1

    BSTRobin
    Community Moderator
    Community Moderator

    Hi lvdlvd,

    If you have Saleae logic, you can capture waveform to check the actual communication signal.

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