Nothing special - just boxes. Those with working 3D printers please ignore me. For the rest… I just took delivery of 20 boxes at less than 50p each and I think this is the best box purchase I’ve ever made – got them from Banggood though I’m sure you can get them elsewhere. The link is above.
Inside size is 50mmx70mmx 25-26mm deep. There is a keyhole in the back for mounting and vents top and bottom.
I have to tell you I have a million uses for these – you could easily get an ESP12 plus whatever sensor in there and having the vents at top and bottom is great. There are mounting posts in the bottom, 2mm x 62mm and you'd need holes 5mm dia.
So ideas…. wall temperature sensors. Something I’ve done with this kind of box in the past is to put a sensor in there (at the bottom – important) and mount 2 opposing RGB LEDs in the middle pointing up and down – when the heating is on – the thing glows red, when off it glows blue – looks MARVELLOUS. But I was paying a hell of a lot more for the boxes!
I can see these getting a LOT of use – from access points, thermostats, movement sensors – you name it – ideal size and sooooo cheap.