The documentation for the BME688 states "the gas sensor can detect Volatile Organic Compounds (VOCs), volatile sulfur compounds (VSCs) and other gases such as carbon monoxide and hydrogen in the part per billion (ppb) range."
Is it possible to access the levels of each of these components from the output of the development kit? Or is the only output available in ohms. If this is the case, how can one interpret the output?
BME688 can be trained to detect specific VOC gases, but it cannot measure the level of the gasses. For example, you can refer to https://www.youtube.com/watch?v=4vdliMRtxBY about how to train BME688 to detect coffee using BME AI-Studio SW. But it cannot tell how strong the coffee is in the unit of ppm or ppb. It can only tell you "yes, coffee is present" or "coffee is not present".