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Adafruit_BME680 code didn't call BSEC library.
You could refer reference code https://github.com/BoschSensortec/Bosch-BSEC2-Library/blob/master/examples/generic_examples/basic_co..., add BSEC_OUTPUT_CO2_EQUIVALENT, BSEC_OUTPUT_BREATH_VOC_EQUIVALENT to sensorList, then you can get the output value of co2 equivalent estimate amd breath VOC concentration estimate.
Those values come from this sheet below right? Can you confirm whether or not we could hipothetically just all all of the signal names below to output everything? And can you point me to the pdf with the information below to study it?