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    BME280 pressure deviations

    SjoerdOpdam
    Occasional Visitor

    BME280 pressure deviations

    For one of our products we are using the BME280 sensor. There are  of these 2 sensors in each product. I noticed that in one of the systems, the sensors ambient pressure is much higher than for the other systems. On a single day, two systems indicate ~995 mbar (on both sensors). This seems to be correct since it matches with the weather data for our location. One system however has a pressure of ~1020 mbar on both sensors (in the same room). This deviation seems to be quite high and I don't understand where this could come from. Can someone explain what could cause such large deviations for a single systems ?

    What's interesting is that BOTH sensors on this system deviate, so part-to-part variations seem unlikely, since then I would expect to also see this kind of deviations in and between other products.

    Tags (2)
    1 REPLY 1
    BSTRobin
    Community Moderator

    Re: BME280 pressure deviations

    Hello SjoerdOpdam,

    There was BME280 HSMI document, you could check handling, soldering and mounting the BME280 to your PCB.
    https://www.bosch-sensortec.com/media/boschsensortec/downloads/handling_soldering_mounting_instructi...

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