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    Bme688 iaq calibration problem

    Bme688 iaq calibration problem

    ilcnet
    Established Member
    Hello BSTRobin
    i have 2 Bme688 sensor, that i calibrated them in clear air first time and those working well, one of them was turned off for a few days and today i turned on it but the sensor gives a false iaq value and its start from 300, but other sensor iaq value start from 20, how i can solve this problem its needed to erase eeprom?or its needed to be calibration again with which codes?
    Thanks
    5 REPLIES 5

    BSTRobin
    Community Moderator
    Community Moderator

    Hi ilcnet,

    Could we know somoe informations from you:
    How long did it take you to calibrate the sensor?
    Is the sensor status saved after calibration?
    After opening the sensor, is the previously saved state loaded?

    ilcnet
    Established Member
    Hi BSTRobin
    When I first turned on the sensor, it worked for 5 or 6 hours with the sensor code of Adafruit library , and about one of the sensors, which I turned on inside the room, and now the same sensor has a problem. Before this new problem, it recognizes the inside of the house as cleaner than the outside. The values are reversed for example when the sensor sens co2 its value going down and iaq value is going to negative.

    BSTRobin
    Community Moderator
    Community Moderator

    Hi ilcnet,

    Before you tun off the sensor, will you save calibration status? If no, BSEC will recalibrate the sensor.

    ilcnet
    Established Member
    Hi BSTRobin

    How can i save calibration status?
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