Hi, If you don’t get any joy finding the code but still want to make something like this I have done similar projects. The links below were written during the development so waffle a bit but should contain all the information.
A 16 channel controller for ‘dumb’ LEDs that receives E1.31 data over WiFi via an ESP8266 and is expandable up to 64 channels on the current board. I have used these for the last two years without issue.
What turned out to be a universal controller that receives wired E1.31 and outputs to 16 relays / SSRs (dimming working but only bench tested), DMX, WS2811/12 pixels, TLS3001 pixels and we have been testing Renard. The Relay/SSR example is around post #34.
I have a copy of the code and I am assuming that since ElNino put it in the public domain initially that he would be OK with me sharing it.
I never built this, nor can i guarantee the code is the latest, works, etc etc,
But it may save you some typing! Good luck.