Raspberry Pi ws281x library for Node.js

Disclaimer: This library is heavily inspired by beyondscreen/node-rpi-ws281x-native

> if you happen to know C++ and node/iojs/V8, I would really appreciate any help
> and feedback on this module.
> There is certainly lots of room for improvement.

This module provides native bindings to the
rpi_ws281x library by Jeremy Garff to
provide a very basic set of functions to write data to a strip of
ws2811/ws2812 LEDs. this will only run on the Raspberry Pi.

Setup

this module is available via npm:

npm i @bartando/rpi-ws281x-neopixel --save

if you prefer installing from source:

npm install -g node-gyp
git clone --recursive https://github.com/lubomirmolin/rpi-ws281x-nodejs
cd rpi-ws281x-nodejs
npm install
node-gyp rebuild

Usage

``javascript
exports = {
/**
* configures PWM and DMA for sending data to the LEDs.
*
* @param {?Object} options intialization-options for the library
(count = required, frequency = default 800000, dmaNum = default 10,
* gpioPin = default 18, invert = default false, brightness = default 100 [range 0 - 100],
* stripType = default WS2811_STRIP_RGB [see types below])
*/
init: function(options) {},

/**
* Sets color for the pixel by position
*
* @param position
* @param {r, g, b}
*/
setPixelColor: function (position, {r, g, b}) {},

/**
* Sets one color for the whole strip
* @param {r, g, b}
*/
setAllColor: function ({r, g, b}) {},

/**
* set the overall-brightness for the entire strip.
*
* @param {Number} brightness value from 0 to 100.
*/
setBrightness: function(brightness) {},


/**
* show data on the LED-strip. Needs to be called for changes to take place
*
*/
show: function() {},

/**
* clears all LEDs, resets the PWM and DMA-parts and deallocates
* all internal structures.
*/
reset: function() {},

/**
* Retrieves color at given pixel position
* @param position
*/
getPixelColor: function (position) {}
}
`

The strip types:

`
# 4 color R, G, B and W ordering
SK6812_STRIP_RGBW
SK6812_STRIP_RBGW
SK6812_STRIP_GRBW
SK6812_STRIP_GBRW
SK6812_STRIP_BRGW
SK6812_STRIP_BGRW

# 3 color R, G and B ordering
WS2811_STRIP_RGB # Default
WS2811_STRIP_RBG
WS2811_STRIP_GRB
WS2811_STRIP_GBR
WS2811_STRIP_BRG
WS2811_STRIP_BGR
`

For the usage look at the colorwipe.js example

Run by `sudo node examples/colorwipe.js``