Designed a quite simple holder for the Philips Hue Motion Sensor that sits over the door.
With a 20 degrees angle, so there is bigger chance of the sensor too recognize someone at the door.

The magnetic part screws into place using a normal M3 screw through threaded hole.
And the lip(lower part of the model) gets squeezed between the wall and door seal.
Therefor I uploaded 3 versions with different thickness of the lip(1, 1.5 & 2 mm lip).
Also the height of the "lip"/the part that gets between the door seal is 11 mm.
(more sizes on request)

I used the 1 mm and that was good enough.

Print instructions

No needs of support of any sort.
Infill is suggested. I printed mine with 20%.
More perimeters(walls) might be good for rigidity.
Bracket/holder for a corner, can be printed as imported.