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    BME680 - Sensor Life in Days

    d_baronov
    New Poster

    BME680 - Sensor Life in Days

    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

    Re: BME680 - Sensor Life in Days

    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

    Re: BME680 - Sensor Life in Days

    Hi,

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

    Best regards.

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