Hi, I have my own weatherstation, which can measure:
For the protocoll, so I'm flexible, because I do the protokoll, you like.
At this time, I send the data to weather Underground and PWS-Weatherstation.
I would recommend, you use the same protocol as WU does, because, then it is very simply to implement, because there are a lot of weatherstations outside which use this protocol.
It would be fine, if I could upload also a picture from a webcam.