humidity correlation / additional measurements submitment

[coelner]

there is a function (in hackair.cpp) to correlate the measurement from the dust sensor with the humidity.
But we do not use them to calculate the fixed values.

We should use the temperature and humidity values within the api and store them at least online.
We could then flag then the measurements as invalid if we have environmental parameters which are out of range of the dust sensor.
the sds011 datasheet sets 70% humidity as working maximum and a temperature range from -10 up to 50°C

[thgeorgiou]

We started using the adjusted value in the latest releases but making the humidity measurement submittable is up to the API team. We could however add some local checks about the sensor's limits and discard invalid measurements.