This is a remix from the linked Thing on Thingiverse by McLoid.

Updated to include a camera hole for motion detection, much thinner front cover with adjusted corner blocks for a more flush fit, and slots on the bottom and left to easily pry off the cover and access the guts inside. The clip on the right has also been changed to accommodate a down-facing right-angle USB cord.

My settings:

Filament: eSun PETG (PLA works fine as well, I just ran out!)

Wallmount: 0.2mm

Cover: 0.16mm

Infill: 15%

Supports: No (There are overhangs where the clips connect, but they successfully printed for me without any support)

The above creates a nice, strong box, but enough flexibility in the cover to easily remove when needed.