Hello, I used the BME680 with the calculation into the IAQ-Index in a classroom. At the same time I meassured the CO2 value with another sensor in the classroom. Afterwards I made an history chart, which I attached, with both values and everytime the windows had been opened the CO2 value drops and the IAQ-Index increases. Normaly the IAQ-Index should also drop, shouldn't it? Could the time filters and the algorithm in the BME680 be the reason for this strange behavoir? Or is there another reason? Is there anyway I can fix it? Thanks alot in advance.
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