BME680 are working under Force mode when using BSEC lib.
So you are also able to make BME680 working more offten (higher ODR) with Force mode and just call the BSEC every 3 s to get IAQ value.
This means you need to feed in the data for BSEC lib and get the suggest sensor control setting from BSEC for next calling every 3 s.
The highest ODR are determined by the over sampling setting for gas, pressure and humidity sensors which you can find relationship in datasheet.
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