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    BME688 strange data

    ole-johan
    New Poster

    BME688 strange data

    Hi. I have used the BME680 and BSEC in a previous design with good results. Now I am working on a new design on a new platform where I am using the BME688. I expect to use BSEC later, but for now I am doing bringup and just need to see that I get decent results from the sensor. So I have implemented the example code for forced mode, and everything runs OK, meaning all the api calls return OK, but I get this strange reading:

    bme68x_get_data result: status=80, meas_index=22, res_heat=64, idac=0, gas_wait=128, gas_resistance=795326.88, temp=0.90, pres=190403.41, hum=0.00

    To be clear, I only get this type of data, with small variation in the beginning. So it is consistent in giving me wrong data, but there are small changes so I expect I get actual data.

    Any tips on what can be wrong? 

    3 REPLIES 3
    BSTRobin
    Community Moderator

    Re: BME688 strange data

    Hi ole-johan,

    Run example code https://github.com/BoschSensortec/BME68x-Sensor-API/blob/master/examples/forced_mode/forced_mode.c, we don't see any abnormal data. Is your code the same as the example code?

    ole-johan
    New Poster

    Re: BME688 strange data

    Hi, thanks for your prompt reply! 🙂

    Yes, this is in fact the example code that I also have implemented. So that is what I found to be strange...

    Working with the BME680 for many years, I have never seen any such problems. So I guess this is some stupid, strange bug... 😉

    Also, fyi, I have tested this on 3 different units, all with the same issue, so it's not a single unit fault.

    Thanks,

    Ole-Johan

     

    BSTRobin
    Community Moderator

    Re: BME688 strange data

    Hi ole-johan,

    The example here can also be used on the BME680. If it is convenient for you, you can run the same example(without any change) and compare it on the BME680.

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