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    Avoid Gas measurement with BME680

    sguigue
    Member

    Avoid Gas measurement with BME680

    Hi everybody, I have to program a BME680 with a µc in different configurations. In on of them I would like to skip the gas measurement and do only measurements for pressure, temperature and humidity. Is there a way to do that? Should I just let all the gas registers to 0?

     

    Thanks for your reply,

    Sébastien

    7 REPLIES 7
    nkdnnlr
    Member

    Re: Avoid Gas measurement with BME680

    Hi Sebastien

    I just had to do the same. in forced mode, if you set the heater duration and temperature to (0, 0), and if you set the conf.enable bit to BME68X_DISABLE (which is UINT8_C(0x00)) then you don't measure the gas anymore. I then also commented out some of the waiting times in bme68x.c -> bme68x_get_meas_dur() and managed to achieve sampling rates for pressure, humidity, temperature of 100Hz. see how it looks for me:

    nkdnnlr_1-1631710934608.png

    I have not fully characterized the stability of the sensor with those settings, but looks alright for now.

    Nik

     

    sguigue
    Member

    Re: Avoid Gas measurement with BME680

    Hi Nick, thank you for your answer! It is supposed to be easy for me because all the registers are set to zero after a reset, so I will just let them like this and it will probably be good ^^

     

    Sébastien

    nkdnnlr
    Member

    Re: Avoid Gas measurement with BME680

    Hi Sébastien

    I am curious to hear if you can read out anything at all with all registers set to zero 😁 but yes I am sure you will manage! Let me know if there is anything else I can help regarding this.

    Cheers,
    Nik

    sguigue
    Member

    Re: Avoid Gas measurement with BME680

    Hi Nick,

     I meant all registers related to gas measurement to zero, of course I will set the other registers 😅

     

    Sébastien

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