After three callbacks, I nailed the motion sensor alignment in a cathedral ceiling.

Patience and a laser level did the trick.

3 comments

3 Comments

Wait, does aiming it down the slope really work best? I had nothing but false triggers when I tried that, @the_vera. My dog would set it off just walking across the room. I found you actually want the sensor to point parallel to the slope of the ceiling, not down it. That way its field of view covers the whole room flat instead of pointing into the floor on the high side. Otherwise you get dead zones and it reads movement on the far wall as being closer than it is. A ceiling fan on low speed kept turning my lights on and off until I re-aimed it.

the_vera1mo ago

Cathedral ceilings are the worst for this, all those weird angles trick the sensors. I had to mount one where the pitch was like 90 degrees in the corner. The trick is to aim it down the slope, not straight across. Good mounting hardware makes all the difference with those high ceilings. Laser level was a lifesaver for getting the brackets right.

butler.tessa1mo ago

Oh man, "cathedral ceilings are the worst" is so true. I felt that in my soul. I had the exact same problem with false triggers from my ceiling fan, just like @keithl51 said. Getting that angle right is such a pain. It really does feel like a huge win when you finally get it to work right.