This is a case for the D1-mini based board from Hasenpups, that is designed to connect addressable LEDs/Neopixel strips and handle them with the WLED firmware.
You can find the PCB-design on Github here:
https://github.com/Hasenpups/WLED_Controller

And the Neopixel-Firmware by Aircoookie here:
https://github.com/Aircoookie/WLED

I use M3 "knurled" thread inserts by ruthex.

Anet

A8

No

Yes

0.2 mm

15%