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    BME680 - Sensor Life in Days

    BME680 - Sensor Life in Days

    d_baronov
    New Poster

    What does parameter “4d / 28d = Sensor Life in Days” mean?
    How does this parameter affect sensor calibration and accuracy?

    2 REPLIES 2

    Yanchao
    Community Moderator
    Community Moderator

    Hi,

    In the integration guide we released with generic release package, such parameters are explained on Page 7:

    The history BSEC considers for the automatic background calibration of the IAQ in days. That means changes
    in this time period will influence the IAQ value.
    · 4days, means BSEC will consider the last 4 days of operation for the automatic background calibration.
    · 28days, means BSEC will consider the last 28 days of operation for the automatic background calibration.

    How to understand background calibration?

    1. When BME680 found better/worse gas than before, the accuracy would be 2 and it means our sensor is in calibration. Then after calibration finished, the accuracy comes to 3.
    2. From that moment, sensor is into background calibration. If you chose 4 days (28 days) as the time for background calibration, after 4 days (28 days) without any better/worse gas, the accuracy comes to 1 and this means BME680 needs gas trigger for calibration.

    Best regards.

    Yanchao
    Community Moderator
    Community Moderator

    Hi,

    If you get the answer, please click Accept as Solution to close this ticket.

    Best regards.

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