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    BMP280 sensor accuracy

    BMP280 sensor accuracy

    AnnaB
    New Poster

    Hello! We have problems with BMP280 accuracy..The datasheet indicates that the typical (or 1-sigma) absolute accuracy of BMP280 is +/-1hPa from 300 ~ 1100hPa under the temperature 0 ~ 65C. So min/max accuracy is +/-3hPa (3-sigma).

    Out of the 1415 BMP280 units soldered to the PCBs, 1390 units (or 98%) show a deviation from the calibrated reference +3 ... + 6 hPa, which exceeds the 3-sigma accuracy range (+/- 3 hPa). The data is visualized in the attached pics. Our reference of ambient pressure value is the Nesa BAR-AV calibrated high precision barometer (0.15 hPa accuracy).

    We compared the soldering profiles with the specification and found no discrepancies..

    What could be the reason for such problems?

    BR,  Anna

     

    press1.JPG

    press2.JPG

      

    7 REPLIES 7

    BSTRobin
    Community Moderator
    Community Moderator

    Hello AnnaB,

    Could we know what is the software you used as you read pressure data from BMP280?

    Sure

    Any comments?

    BSTRobin
    Community Moderator
    Community Moderator

    Hello AnnaB,

    BMP280 official reference code was written by C language, https://github.com/BoschSensortec/BMP280_driver

    If your host platform run C++ code, you could refer github C code or arduino C++ code and migrate to your host platform.
    https://www.arduino.cc/reference/en/libraries/adafruit-bmp280-library/

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