Hi VGB,
Thanks for your inquiry. Firstly, ensure that your BME680 hardware is designed correctly, referring to the official BME680 shuttle board https://www.bosch-sensortec.com/media/boschsensortec/downloads/shuttle_board_flyer/application_board...
I upload BME68x example code on STM32 based on BME68x sensor API & example(https://github.com/boschsensortec/BME68x_SensorAPI) for your reference.
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