I wouldn’t say that it is against the design of OH but it certainly is not something that is currently supported. The only system based triggers I know of are System started and System shutdown, and the reliability of shutdown is a little in question based on some other threads I’ve helped people with.
Hi,
do you mean that if I want to start a rule simply using an icon on UI it is not possible? Consider that the icon I mean it is not link to a things.
This because I need to switch on a channel and switch off it after 1 second.
Then you need to create an Item linked to a Channel on the Thing. You can trigger a Rule by sending a command or update to an Item. That is one of the reasons Items exist.