@marceltrapman I'd love to see your work when its done.

I'm currently considering wiring 12v around the house to feed sensors, and maybe replace the wireless board by implementing a wired signal protocol (modbus for instance).

I have a feeling it would be more efficient regarding power consumption, and the house wouldn't be so saturated with 2.4ghz radio signals.. which might not be so healthy

I must reiterate though, I'm a noob.. so if anything I just said doesn't make sense please object me :D I would appreciate

@ServiceXp said:

I think finding a solution to fix inside the electrical box with the outlet is going to be difficult, but I'm very interested in what you come up with.

Yeah, I know.. although I know it must be possible otherwise this wouldn't exist:

Dimensions: 49,5 x 48,5 x 15 mm.
Habeetat® HPA-2130
Habeetat® HPA-2130 Datasheet

That's exactly what I want.. but a cheaper, hack-friendly and MySensors compatible version of it.

Hello @marceltrapman, how will you power the board from the mains?

I'm a noob in this things yet.. and I'm trying to make a relay sensor to control lights, also put behind the electrical outlet (220vac).. I'm having trouble figuring out if I should add some kind of transformer for every sensor or maybe distribute a 5vdc line from the controller itself..