and it still ain't a goddamn thing they could tell me

README.md

Glowed Up

Control LED pixels via Arduino in node

Installation

Downlaod and install the arduino library

$ npm i -g nodebots-interchange
$ interchange install git+https://github.com/ajfisher/node-pixel -a uno --firmata
$ wget https://raw.githubusercontent.com/firmata/arduino/master/examples/StandardFirmataPlus/StandardFirmataPlus.ino
$ arduino --board "arduino:avr:uno" --upload StandardFirmataPlus.ino --port /dev/ttyAMA0
$ npm i

Run

$ npm start

glowed-up.js

const five = require('johnny-five')
const pixel = require('node-pixel')

const board = new five.Board({ repl: false })

const numPixels = 150
const fps = 50

const setup = () => new Promise(resolve => {
  board.on('ready', function() {
    const strip = new pixel.Strip({
      board: this,
      controller: 'FIRMATA',
      strips: [{ pin: 13, length: numPixels }],
      GAmma: 1,
    })
    strip.on('ready', () => resolve(strip))
  })
})

const hexToRGB = (hex) => {
  const res = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex)
  return res ? {
    red: parseInt(res[1], 16),
    green: parseInt(res[2], 16),
    blue: parseInt(res[3], 16),
  } : null
}

const butts = (strip, numPixels) => {
  let curPixel = 0
  let curColor = 0
  const colors = ['#2E112D', '#E97778', '#89C7B6', '#FFD57E', '#AD84C7', '#7998C9']
  return () => {
    if (curPixel >= numPixels) {
      curColor++
      curPixel = 0
    }
    if (curColor >= colors.length) {
      curColor = 0
    }
    strip.pixel(curPixel).color(colors[curColor])
    strip.show()
    curPixel++
  }
}

setup().then(strip => {
  const loopStep = butts(strip, numPixels)
  setInterval(loopStep, 1000 / fps)
})

package.json

{
  "name": "glowed-up",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node glowed-up.js",
    "reset": "firmata-party uno --debug"
  },
  "author": "Andrew Kennedy",
  "license": "ISC",
  "dependencies": {
    "firmata-party": "^1.5.9",
    "johnny-five": "^0.14.3",
    "node-pixel": "^0.9.3"
  }
}