// the find
Phr3d13/SignalRGB-ESP32-Firmware
ESP32 firmware written in C (ESP-IDF) that bridges an ESP32 to SignalRGB for WiFi-controlled WS2812B LED strips. It implements a captive portal for WiFi provisioning and a UDP server for receiving SignalRGB lighting commands. Squarely aimed at DIY LED enthusiasts who want PC-synchronized lighting without dedicated hardware.
Uses native ESP-IDF rather than Arduino, so you get real FreeRTOS tasks, proper partition tables, and menuconfig — not the hobbyist abstraction layer. Captive portal with DNS hijack is the right UX for headless WiFi setup on embedded hardware. Ships a SignalRGB plugin (device.js + device.json) alongside the firmware so the PC-side integration is actually included, not left as an exercise. Clean separation of concerns across files: wifi_manager, udp_server, led_control, signalrgb_protocol are all split properly for a C project of this size.
The README explicitly lists 'Implement UDP server for SignalRGB' and 'Implement WS2812B data send function' as next steps — the core functionality is a stub, not a working implementation. Zero stars and zero forks, no version tag, no changelog: there is no signal that this has ever been tested on real hardware with real SignalRGB. No documentation on the UDP protocol format being implemented, so you cannot verify correctness or extend it without reverse-engineering. The sdkconfig is committed, which locks you to the author's exact ESP-IDF component choices — likely to cause conflicts if you're on a different SDK version.