Needed a sensor for detecting "lights on" and "door open" for the garage. Plate has a hole for a 3.5mm jack (I used Digi-key CP-SJ1-43502PM-ND), photo sensor, and mini USB jack. The photo cell glues into place. A Particle Photon slides into the plate exposing the USB port for power and is held in place with the ...Bracket.stl. The complete unit mounts in a standard (USA) 2X4 electrical box.

I printed it in White PLA (to match the cover plate) at .2mm height and 10% fill

This MUST be printed with Support BUT NO Raft. I printed the plate face down on glass to get a gloss smooth finish.

Also you must tap the two outside screw holes to 6-32 for the cover plate mounting.

123D