I bought this ESP32 ( https://www.aliexpress.com/item/32819907815.html?spm=a2g0s.9042311.0.0.39b54c4dZwsiTr ) to integrate in Home Assistant, but I did not like the "naked" look, so I decided to create a simple enclousure.
It has no locking mechanism (but depending on the tolerance on your printer it might hold in place...) it is as simple to design and to print as possible.

Just print it laying flat, it should not be complex to print. I designed it so it can be printed with a 0.8 nozzle, and even maybe a 1.0 nozzle, but it can be printed with anything smaller than that

Creality

Ender 3

No

No

200

0% (no infill needed, all initial layers & shells)