BSEC_INPUT_HEATSOURCE - How to define?

[rindler]

I have finally created some enclosures for a few of my BME680-sensors. There're quite some holes in it, but still the temperature is 4.6 degrees above the air around. Understand that this is possible to compensate by changing the BSEC_INPUT_HEATSOURCE in some way, but I don't get how I define it? Could you please help me? Am using the basic ino.

Kind regards

[handytech · Accepted solution]

Since you are using the BSEC Arduino library, there is a funtion to do just that: setTemperatureOffset(float tempOffset). This means that you could add iaqSensor.setTemperatureOffset(4.6); in your setup() function to subtract a fixed 4.6°C from all temperature compensated outputs.

[rindler]

Okey, but then the humidity and IAQ, which I understand is being adjusted by temperature won't be affected, or?

That was why I from the beginning thought it would be better to adjust the input_heatsource value than just adjusting the output temperature value.

[handytech]

If you dig a little into the source code, you will see that whatever value fed into setTemperatureOffset() will be used to set BSEC_INPUT_HEATSOURCE 😉 Therefore yes, this is the correct way to input your external temperature influence so that all BSEC outputs will be compensated for it.

[rindler]

Great! Thanks a lot for your patience!