Although it is not hooked up right now (battery died), for years I used this as part of my solution. In my case it was an ‘away’ button, when I arrived back home the system detected my arrival and turned everything back on. The button was stuck to the wall next to the door and I could simply tap the button, as I left for work in the morning and it would shut off all the lights, adjust the thermostat… what ever
What I found out of experience is that every once in awhile the automation I had set up to detect my departure and shut everything down would malfunction and I’d come home and the lights would have been on all day. As time went on, I tried to ‘battle harden’ the automation, to catch edge cases and things I hadn’t considered but every once in awhile I’d come home at night and look up to see all the lights on.
‘The button’ is pretty reliable. The button tells the system I’m ‘leaving for the day’ even if it still detects motion or doors opening and closing for a few more minutes. (forgot my coffee)
Presence detection is actually a kind of tough task. I use the wasp in a box method. I live in a third floor flat and it is just me. There is only one way in and out of the apartment. (unless you are spiderman)
Pro tip: place the button near the last place you pick everything up as you leave. For me that is the kitchen counter where I leave my keys and wallet when I get home. By the time I get to the front door, I might have both hands full.