So… i find a good solution for the problem
my currend weather conditions always says 0mm or just “Precip: — mm”.
So i checkt the weater api from wunderground. The api send this data to my:
hmmm. thats not what i want. I think the the weatherstation has no precip sensor. But how to find a weatherstation with this sensor. So i go http://www.wunderground.com -> personal weather stations -> Select in the weatherstation setting (small gear) the precip. No go to your location and find a weatherstation how display 0 or more precip. In my area are a lot of stations how display — precip.
Select the station and write the Station ID in your opensprinkler pws:STATION_ID.
have an nice day.