I'm new to this forum and have just received my first shelly 1pm now when I want to start hooking it up to my ventilation system of my house. The system itself has a switch similar to a shutter however I noticed I only have 3 wires in my 3 way switch. 1 brown wire 1 full black and 1 black and white. When switch is in neutral the ventilator is off, when on 1 it is on speed 1 and 2 on speed 2. All of the wires seem to have power on it when checked with a screwdriver with electric indicator.
I was wondering if I could insert the shelly 1pm to one of the wires. Should I need power for the shelly to run I could steal that from the electric socket next to my switch.
Any idea how I could hook up the wires properly so I could use it as on/off for one of the speeds?