Peter, the OSPi OS is Jessie, the RPi3 running the Weather Service now is stretch.
As always your instructions and explanations make perfect sense, I do appreciate your patience. Now I can report my Weather Service is running and receiving data from my PWS. Happy now, I will report back next Thursday when I’m back from work.
I also prepared my Pi Zero W from scratch following your instructions on github. I will try to give some feedback there.
Once more, THANK YOU
Servus from Austria,