That would be simpler. In such case value 1 means activate relay.
Thanks Andrei for your idea, but I fear this will be too advanced for me - I am not a programmer. Anyway, thanks for your thoughts.
And thanks edje for this hint too. I normally just click "the big red button" but should evaluate to partial deployment in future as suggested.
Thank you all, I think this discussion can be closed as "solved" now.
