Bosch Sensortec Community

    cancel
    Showing results for 
    Search instead for 
    Did you mean: 

    Different Readings of Gas Resistance for BME688 Using with different MCU

    Different Readings of Gas Resistance for BME688 Using with different MCU

    msalmankhan
    Member

    Hello everyone!
    I am working on a project to interface BME688  with nrf52 chip, I am using BSEC lib v2.
    I am able to read data from the sensor, to validate my data whether I have corrently interface the sensor or not, for this reason I have used another MCU ESP 32S , A example code is provided in library pakage I have used the example code. 
    while comparing the data for two MCU's  from the sensor, strangely I found that all the readings are similar except Gas Resistance. 

    as you will see in screen shot.
    The ouput for both MCU is attached here with question.

    I found that ESP-32S showing high gas resistance compare to the NRF52.

    bsec_serilized_configuration_iaq.h is used for both MCU's.

    I am unable to find the reason for this, what could be the possible for reason for this conflict?
    Thanks.

    Debug output:

    output variance.jpg

    1 REPLY 1

    BSTRobin
    Community Moderator
    Community Moderator

    Hi msalmankhan,

    You can see IAQ accuracy is 1 from your output.
    It need some time to finish the calibration until accuracy reach to 3.

    BSEC accuracy.png

    Icon--AD-black-48x48Icon--address-consumer-data-black-48x48Icon--appointment-black-48x48Icon--back-left-black-48x48Icon--calendar-black-48x48Icon--center-alignedIcon--Checkbox-checkIcon--clock-black-48x48Icon--close-black-48x48Icon--compare-black-48x48Icon--confirmation-black-48x48Icon--dealer-details-black-48x48Icon--delete-black-48x48Icon--delivery-black-48x48Icon--down-black-48x48Icon--download-black-48x48Ic-OverlayAlertIcon--externallink-black-48x48Icon-Filledforward-right_adjustedIcon--grid-view-black-48x48IC_gd_Check-Circle170821_Icons_Community170823_Bosch_Icons170823_Bosch_Icons170821_Icons_CommunityIC-logout170821_Icons_Community170825_Bosch_Icons170821_Icons_CommunityIC-shopping-cart2170821_Icons_CommunityIC-upIC_UserIcon--imageIcon--info-i-black-48x48Icon--left-alignedIcon--Less-minimize-black-48x48Icon-FilledIcon--List-Check-grennIcon--List-Check-blackIcon--List-Cross-blackIcon--list-view-mobile-black-48x48Icon--list-view-black-48x48Icon--More-Maximize-black-48x48Icon--my-product-black-48x48Icon--newsletter-black-48x48Icon--payment-black-48x48Icon--print-black-48x48Icon--promotion-black-48x48Icon--registration-black-48x48Icon--Reset-black-48x48Icon--right-alignedshare-circle1Icon--share-black-48x48Icon--shopping-bag-black-48x48Icon-shopping-cartIcon--start-play-black-48x48Icon--store-locator-black-48x48Ic-OverlayAlertIcon--summary-black-48x48tumblrIcon-FilledvineIc-OverlayAlertwhishlist