Hi, I have created two pull request that remove the arduino dependency from bsec2/bme68x libraries, so these can be used in automated build systems together with platformio without arduino, e.q. esp-idf. No change if arduino is used.
Additionally, I added a PR to use the esp32-c3 build of bsec2 for all other risk-v based esp32 variants.
https://github.com/boschsensortec/Bosch-BME68x-Library/pull/8
https://github.com/boschsensortec/Bosch-BSEC2-Library/pull/50
https://github.com/boschsensortec/Bosch-BSEC2-Library/pull/51
Please consider merging these PRs.