Lux is a collection of components for driving WS2812B RGB LED strips over networks.

• luxsrv - Lua program for the NodeMCU ESP8266 devkit that listens for network packets describing the color setup and driving the WS2812B LED strip;
• luxaudio - Go program that captures audio, does spectral analysis on it, and sends a spectrum visualization to the strip over the network;
• luxfx - TypeScript application with a few predefined effects. It can work either with a locally-connected strip (connected to the same device running the program), or following the protocol to drive network-attached strips.

The luxsrv component listens for UDP packets on port 42170.

UDP packets that luxsrv understands have the following generic structure:

| 2 | 1 | N | | Header | Effect Mode | Effect Payload | | x4C x58 | x00-01 | ... | 

In raw mode, clients send the number of LED pixels to drive (up to 255), followed by a sequence of GRB components giving the color for each of the pixels.

| 2 | 1 | 1 | (PixelCount * 3) | | Header | Raw Mode | LED Pixel Count | GRB data | | x4C x58 | x00 | x00-FF | px0g, px0r, px0b, px1g, px1r, px1b, ... | 

For example, to light up the 1st pixel in red, the 2nd one in green, and the 3rd in blue:

[ 0x4C, 0x58, // header  0x00, // mode = raw 0x03, // pixel count = 3  0x00, 0xFF, 0x00, // 1st pixel GRB color = 0x00FF00 (red) 0xFF, 0x00, 0x00, // 2nd pixel GRB color = 0xFF0000 (green) 0x00, 0x00, 0xFF, // 3rd pixel GRB color = 0x0000FF (blue) ]

• WS2812B RGB LED Strip - Buy on AliExpress
• NodeMCU ESP8266 DevKit - Buy on AliExpress