Thank you Bob for your quick answers.

Well, DropBox and Google Drive are new words for me. If we come to this point, I hope, to have an internet expert in my team.

The diagram I asked for (I like diagrams to see, how software components interact) is not so important as I'm satified with your answers before.

Regarding SBIG's "AllSky" camera and Baader's "AllSky" dome I find a solution with Baader. If possible, I write the ASCOM driver, as soon as the new standard for the SWITCH is ready.

Thanks again

Hartmut Bornemann