this is an enclosure for the famous sonoff basic wifi switch.
it can be installed hanging on the wall by simply placing the base between the wall box and the mounting plate, see pictures for details.
i designed 4 versions, with and without a box for a dht22 temp and humidity sensor that can be installed onto the 503 and 502 wall boxes.
print the stl as is without supports.

You can find all my models here, thank you who will appreciate with a download or with a like