board with relay for hide behind switch.
Hi, I have common european switches in my house
I intend to use some pir sensors in my house to turn on lights, but I did not want to miss the method of manually switching them on by the switch.
I'll use the home assistant as the interface.
Is there a relay board where I can hide behind the switch, where the home assistant then knows if the light is off or on?
Which board to advise me, needs to be small.