Internal calibration for humidity, other parameters

[mayor]

I have three BME680 sensors whose readings you can see below. They are in the same location, so I would expect readings to be within specified tolerances.

You can see that the "yellow" sensor is off, especially with regards to humidity.

I have not seen APIs to apply humidity calibration. Can this be done within the sensor, so that IAQ readings take it into account, and not as a post-reading calculation?

Note the gas readings are also very different. 

This isn't confidence-inspiring, but I am willing to try whatever is suggested here.

[Minhwan]

Hello Mayor, 

Firstly, if you are using BSEC 1.4.8.0, it's the humidity data you got is already calibrated. 

You can check calc_humidity function in bme680.c  and it is used in BSEC. 

And I saw your result and it's within our spec. 

The accuracy tolerance is +-3% r.H.

Thanks,