Hi Sir: Regarding some additional questions: 1. Please see the topic and you will know their definition descriptions: https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/BME680-Min-and-Max-values-of-CO2e-and-b-VOC/m-p/19529#M5423 IAQ have no unit, and PPM means parts per milion. And from BME680 datasheet you also can know what b-voc we test in laboratory is how to mixture. 2. IAQ only reflect the air quality worse or better, which means the device is in more better air condition or more worse, can't compare one site with another site at the same time, but we can know the air quality is becoming good or bad after you move sensor. 3. Humidity may not be re-calibrated, but termperature offset can be inputed to BESC algorithm. by bsec_iot_init() function. Recommand you to recreate a new topic to talk about your thoughts in order to trace it. We will give you the satified answers for your queries. New thought, new topic, 😄.
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