BME688 - How to interpret the output curves in AI-Studio and measure the intensity of a single gas?

[KK321]

Hello - I'm experimenting with the BME688 gas sensor. I want to measure the intensity of a single gas. Is this possible with the BME688 sensors? I operate the sensor via a Raspberrypi 4B and use the BME688 breakout board: So a single sensor. For the evaluation I use AI-Studio from Bosch. How can I interpret the output curves? Which of the curves in particular is the VOCs evaluation curve?! In short: Is it possible to measure not a gas mixture, but a single gas, i.e. its intensity and then learn fingerprints from it for the AI? Can I also evaluate threshold values with the sensor?

[BSTRobin · Accepted solution]

Hi KK321,

Using BME688 and running BSEC software, it can recognize gas types, such as detecting that the current environment is normal air or CO, but does not support output intensity.

[KK321]

Hi BSTRobin -                                                                                                                                                                                                                                                                                                                        I've imported some raw data from the BME688 into an Excel sheet and I'd like to understand what's what now?! I've opened a file saved on the Raspberry after stopping the Phythonscript. This file is unsally imported to the Bosch AI-Studio - but now imported to Excel: What do the numbers represent exactly - what does each value mean and in particular what are the gas sensor (VOC) values?! Please look at my pictures below. Could you please commed the values? Thank you!

[KK321 · Accepted solution]

Some more details of the Excel sheet in the picture below.