[hornychz]

1) More refined and versatile? Maybe I'm wrong, but comparing the two graphs (yours, and the official) yours, is starting to have readings too late in the beginning of the day (and I suspect that it starts to show zero too early at the end of the day too).

The better one, is the one which produces better results, and this may take months to determine. Hope this thread don't goes in the direction of "mine is better than yours".

Yes, yes ... my sensor starts late, because it is temporarily too low in the garden and in the mornings and evenings is in the shade ... The second reason differences is my location is about 70 km west from the CHMU meteo station in Hradec Kralove, so the overcast isn't the same in the both location (and some clouds are at us early then at Hradec Kralove).

Caneira, you are a great pattern for me, and community in this forum too ... I love WeatherDuino, I think it's the best meteo station available for amateurs. And this is only one reason for me to add some of my thoughts into this forum, not "mine is better than yours". Because I thought it might be interesting for the others, I wrote it into forum, not into PM. And I repeate, before your work take my hat off!