Hi,
I believe you are using Arduino since your boards for Arduino.
If so, you have to download BME68x API and BSEC2 for Arudino in below URL.
https://www.bosch-sensortec.com/software-tools/software/bme688-software/
You should add those 2 zip files in your Arduino library.
Then, open BSEC2 example like basic.ino
\Arduino\libraries\Bosch-BSEC2-Library-master\examples\generic_examples\basic\basic.ino
You shouldn't touch BME68x API part.
The default interface for BSEC2 is i2c, so you can directly use it.
Thank you.
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