Hi, I would like to ask you, I would like to make a remote control for my lights in house, but I would like to keep possibility of using "manual" switch. So I came with idea of using "stairs" switch system which one switch will represent manual switch and second one will represent relay controlled by arduino. Maybe I am already on wrong way to solve my issue, so correct me please.
But during idea of "stairs" system of switching, I will not be able to see if the light is already turned by manual switch or not, so if I will open app and program button to "turn ON" light, in case that light was already turned on over manual switch, I will turn it off even app say "turn it on".
So I am dealing with problem "how to recognize that that light is already ON by manual switch? (btw it can be even AC or heating system, so try to not be fully focus on "light" and light sensors). - But it was in my mind as first idea too, its cheap - but the switch doesnt need to be directly under the lamp so for example switch for light to basement. - I was thinking about CT sensor, but its seems like heavy caliber to "just a check" if device is on/switch is on.
Can someone help me to solve my mind struggling? thx.