This is a ventilated mounting bracket for a DHT22 Temperature+Humidity sensor,
with an integrated connector that the DHT22 plugs into.
It uses standard JST-XH 2.5mm crimp pins.
You can find these at about any electronics supply house.
Note: You will need 3 JST-XH (2.5mm) crimp pins, some wire (I used 28 AWG stranded)
and a crimper.
I've been experimenting with 3D printable custom electrical connectors using standard
crimp pins, and wanted to design the connector into the mounting bracket.
Just crimp the pins onto your wires, insert the pins into the bracket
the same way you would into a standard JST connector housing,
plug the DHT22 into the integrated connector, and snap the ventilated cover on top.
There is a single countersunk mounting hole, and if you need to mount it another way,
you can edit the FreeCAD design file.
My FreeCAD design file is included.
I used PLA Pro at 215C/55C, 0.2mm layer height, (or 0.1mm) 1.2mm walls, 0.8mm top/bottom, 40% infill with a 0.4mm nozzle.
Designed in FreeCAD 0.17, sliced in Cura 3.4.1, printed on a Prusa clone using OctoPrint