[asteroidburger]

I’m a fan of these guys:

https://www.amazon.com/dp/B0CHHZTGJR

Power is passed through from either connector, so it’ll work on 5v or 12v strings. And it’s got two output channels. It’s only an ESP8266 inside, but that works fine for my needs.

For a slightly more DIY approach, try this one:

https://wiki.vdbx.io/product/flip_c3

Has everything you need to give it some sort of power and get the requisite data signal out.

[daredoes]

The ESP8266 is no longer recommended for WLED due to its lack of resources

[asteroidburger]

If you need the upgraded performance, you can pay a bit more and get the ESP32 equivalent: https://www.amazon.com/dp/B0D4Z4YG4H/

Personally, I've found the ESP8266 version adequate in the year I've owned it.