This is a small and easy casing for a Zigbee CC2531 USB-Stick as you can buy on eBay, Amazon and many other shops. The pcb slides into the upper part and is fixed with the lower part and two screws. Additionally I made a wall holder for it.
It should be easy to print, assemble and use.
This casing is only for CC2531 boards with the short debug pins. Boards with longer pins will not fit into the casing - please check before you print. Please have a look at my images above and compare them to your board.
How to assemble
You'll need two screws 2.2x19mm (or longer). You may print the wall holder to screw the Stick to a wall. The screwhole for the holder is for a 4mm screw.
How to print this
Just print both parts from bottom to top with no support needed. Then slide the CC2531 pcb into the case and screw top and bottom together. That's all.