In order to make the calibration time shorter, I save the state well calibrated when IAQ accuracy=3, then I restart the BME with this saved state. Restarting with this saved state, the first data received when IAQ accuracy=0 will be the same data when IAQ accuracy was 3. Then after 5 min, the IAQ accuracy changes from 0 to 3 suddenly. And if we restart in a different environment where air is cleaner, IAQ value will decrease even when IAQ accuracy=0.
My question is can I consider that the BME is calibrating when IAQ=0 and when IAQ value decreases? So that when IAQ accuracy reaches 3 again after 5 min, the BME is already calibrated during this 5 min? Because without a saved state, IAQ doesn't change and I think IAQ accuracy=0 means only a start state.