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    BM680 SENSOR, VOC RESULT GETTING PROBLEM

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    New Poster

    BM680 SENSOR, VOC RESULT GETTING PROBLEM

    I already import in BSEC library in my code. (platform:IDE: Simplicity StudioMCU: EFM32LG332F128G-F-QFP64). However, after execute the "bsec_do_steps" routine, no VOC output result is found. The result is attached. (Remark: NO sensor id = '4' ,BSEC_OUTPUT_BREATH_VOC_EQUIVALENT)

     

    no_sensor_id_4.png

     

    Thank!

    7 REPLIES 7
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    Community Moderator

    Re: BM680 SENSOR, VOC RESULT GETTING PROBLEM

    Hello hihith, 

     

    If accuracy is 0, you can't get VOC result. Depending configuration, but if IAQ accuracy value is 3, that means the BME680 results are reliable. 3s interval configuration case, normally it takes around 20 mins. 300s requires more time because the calibration is based on data.

    Therefore, please let it go for a while, and check it if you can get temp and other sensors' value. 

    Thanks 🙂 

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    New Poster

    Re: BM680 SENSOR, VOC RESULT GETTING PROBLEM

    By the spec.of AN008-48.pdf, it mention output raw gas will affect the value of VOC. 

    hihith_1-1605666454749.png

    I have get the result as below: 

    hihith_2-1605666635339.png

    Condition: When i blow some air to the sensor, the gas is change, the voc and CO2 not change? Could you give me some advice?

     

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    New Poster

    Re: BM680 SENSOR, VOC RESULT GETTING PROBLEM

    Moreover , i have capture more than 1 hour, the IAR accuracy is always zero.

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    Community Moderator

    Re: BM680 SENSOR, VOC RESULT GETTING PROBLEM

    Hello Hihith, 

     

    I could see IAQ accuracy was still 0. 

    Are you using 3s or 300s interval? If you are using 300s, you should take more time. 

    Normally, 3s interval requries 20~30mins. 

    Thanks 🙂 

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