@martinhjelmare: yep, I like the vid too. it's funny to see all these new materials. you are right, I will use parts of rollershutternode I think, for the ac powered version. for the batt powered, I will use my "camel" sensor board plus others thing of others boards I made. I totally agree with you. When I do something I try to keep things reusable. As I am originally software dev, I always think factorizing, libs like a toolbox...lol. But I think electronician do the same.