embedded-react engine — a tiny C99 UI engine for MCUs you drive with JSX (Flow B AOT, or Flow A via the QuickJS bridge). Backend-agnostic: you provide the framebuffer flush.
Drive WS2812 / NeoPixel (and SK6812, WS2813/15, and clones) LEDs on the ESP32 using the I2S peripheral for rock-solid timing under load. Multiple parallel strips (one per I2S channel), multicore-safe, configurable color order, RGBW, brightness, HSV/gamma utilities, and both a C++ and a C API.