Avoid Gas measurement with BME680

[sguigue]

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

[nkdnnlr]

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:

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

Nik

[sguigue]

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]

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]

Hi Nick,

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

Sébastien