Beiträge von HB9EZS

No.

I have just recently installed a Shelly 1 Plus in a light switch but the Shelly doesn't react when I press the light switch. I can control the light through the Shelly app, but not by pressing the physical switch. The whole setup worked before installing the Shelly, so I know the switches are not defective.

My current assumption is that I have too much phantom voltage on the "switching" wire. The switching wire runs parallel to some wires always carrying mains voltage, and therefore voltage is induced to the switching wire. You can see the whole setup in the image:2024-03-13 18_20_50-Präsentation1 - PowerPoint.png

With a standard multimeter I measured 170V between "SW" and "N" when the light switch is off. I assume the Shelly can't differentiate between the 170V phantom voltage and the 230V real voltage.

Has anyone experienced something similar or has an idea on how to fix this?