BME680: understanding measurements in a sleeping room

[Bernd1]

I am running a bme680 BSEC 1.4.7.4 with the 28d days configuration in a ventilated sleeping room, in parallel there is an IR-CO2 meter. The devices now run for several weeks.

Looking in the logs I see this pattern: During the night the CO2 level measured by the IR sensors raise as expected (up to around 1.2K-1.5K) At the same time the resistance of the BME680 increases, which means the air gets better, there sIAQ and CO2e decrease during that time. If, in the morning, the door is opened, the (slow) IR-sensors value decreases a bit and the CO2e raised fast the about the IR-measured value. Too me this looks like the slow increase over night gets filtered somehow by BSEC?

[Bernd1]

I moved the sensor out of its protective housing to see how the housing impacts the measurements. The measurements look better now, but the sensor is often calibrating. I'l wait until BSEC stabilizes and will then upload the data.

[Vincent]

Do you have update test data?

If you are satisfied with latest test data, maybe you can close this topic.