I've recently started my journey down the 3D printer rabbit hole, and have since acquired more than 4 spools of filament. Because of that I needed dry boxes, and because of that I needed humidity sensors. 

Because I wanted them integrated into Home Assistant and not just my eyes, I went on a search for them, and tested out a couple of zigbee and wifi models. 

I'm a fan more of the AAA batteries than cell battery (CR2320 or CR2450 and the like) models. I decided in favour of the “tuya” TS0201 chip which identifies as _TZ3000_fllygh (this can still be either AAA or cell battery btw) which came with double-sided sticky pads, pretty much full size of the sensor body. 

I planted them with said stickers into the dryboxes and called it good. However, after a week or so one became unresponsive and I needed to get it back out… Lo and behold, that sticker was so good (and bone dry, pros and cons), I could only get the sensor off by ripping apart the sticker…  Aliswiftness can never catch a break, complaints, complaints, complaints… 

Anyway, since then the sensors have been living on the bottom of the dry boxes which also isn't good! 

So, I went looking for holders for them, but for the life of me I couldn't find any!? Only mounts the non-networked ones, or circular sensors ruled supreme?!

I popped my cherry, jumped into TinkerCAD and made my own. 

• The sensor body is a snug fit; can be mounted sideways or even upside down I guess?
• No supports needed
• The sensor opening (bottom) is not obstructed 
• The LED indicator (front) is not obstructed
• The reset-button is not freely accessible, it's on the inside of the sensor body, next to the batteries
• The accompanying sticker can be cut in half and used elsewhere!

Pretty damn proud of that :) 

I think I did my best to keep filament usage to a minimum without becoming flimsy. Use it as a purge object when multicolor printing or print it with leftovers. :) 

P.S. Seeing that this my first ever design plus my first upload on this beautiful platform: Comments and criticism are very welcome, but be gentle? ;-)