in the bathroom, I have a double switch. The first activates the main light and the fan, that is, the light in the bathroom and the fan turn on at the same time, and the second activates the mirror with the LED light. The main light in the bathroom is already smart, in the sense that it is a smart wifi ceiling light, which I can control from the smart life application. The problem is that the fan is not smart, and every time I turn on the light in the bathroom, the fan automatically turns on. What I would like to automate, would be with the help of a sonoff relay connected to the fan, and a humidity sensor, to create a scenario so that the fan starts only at a certain humidity set by me, not every time when I turn on the light in the bathroom. Or would it be an option to get a smart switch?
In the case of the situation where I would use the sonoff relay and the humidity sensor, it would mean that the switch that activates the light and the fan should always be on, the fan should start only depending on the humidity, but the light would always have to be turned on/off from the application on the phone? if someone else wants to turn it on, how do they do it?
I am open to any other solution/variant. I’m still at the beginning with the smart home part and not everything is clear to me yet
That is stupid that the fan and light are tied together. Like someone else suggested, split them out. I am not sure if the zooz zen 30 would work in your case.
shelly are recommended often but they don’t make any product thats compatible with 12 awg wiring so keep that in mind if you go with one of those…
Second the suggestion of a Shelly 2. This will give you separate power controls for the fan and smart light. Set it up so the smart light relay is always on, and set up the physical switch as a “detached switch” that doesn’t operate the delay but just communicates an on/off state to your automation hub. You could, but don’t need to, get a second physical switch for your fan. Home assistant to create automations with whatever humidity sensor you want to use. This is the setup I did in my bathroom, and I appreciated it when the smart bulb died because then I just threw in a normal bulb and re-enabled the normal switch function, but still had on/off smart control of the light.