BME688 Adafruit devkit, resolution and IIR filter, default settings

[Skallex]

Hi there!

I'm using the devkit flash software. I'm having trouble finding/figuring out the default resolution, oversampling and IIR-filter settings for the BME688 sensors.Would really appreciate some help with this. Thanks in advance 🙂

Edit: After some digging in the code it looks like the IIR filter is OFF by default. Default oversampling seems to be 1X for Humidity, 2X for for Temperature, and 16X for Pressure. 
From datasheet:

• Humidity resolution set at 16 bit, fixed.
• Pressure resolution = 16 + (osrs_p - 1) = 16 + (5-1) = 20, since osrs_p = 5 for oversampling = 16X
• Temperature resolution = 16 + (osrs_t - 1) = 16 + (2-1) = 17, since osrs_t = 2 for oversampling = 2X.

Seems legit, but if I could get a confirmation on the defaults for IIR and oversampling it would be appreciated 🙂 

[BSTRobin · Accepted solution]

Hi Skallex,

Thanks for your inquiry.

In BME688 data sheet, the default oversampling setting for temperature, humidity, and pressure is 0, and oversampling is not set. Users can set it according to their own requirement.

[Skallex]

Thank you very much!