plotly/examples/signal-stream.js

/* If you have not signed up for Plotly you can do so using https://plot.ly
 * or see the example signup.js. Once you do, populate the config.json in this
 * example folder!
 */
var config = require('./config.json')
  , username = config['user']
  , apikey = config['apikey']
  , token = config['token']
  , Plotly = require('../.')(username, apikey)
  , Signal = require('random-signal')


// build a data object - see https://plot.ly/api/rest/docs for information
var data = {
    'x':[]   // empty arrays since we will be streaming our data to into these arrays
  , 'y':[]
  , 'type':'scatter'
  , 'mode':'lines+markers'
  , marker: {
      color: "rgba(31, 119, 180, 0.96)"
  }
  , line: {
      color:"rgba(31, 119, 180, 0.31)"
  }
  , stream: {
      "token": token
    , "maxpoints": 100
  }
}

// build you layout and file options
var layout = {
    "filename": "streamSimpleSensor"
  , "fileopt": "overwrite"
  , "layout": {
      "title": "streaming mock sensor data"
  }
  , "world_readable": true
}

/*
 * Call plotly.plot to set the file up.
 * If you have included a streaming token
 * you should get a "All Streams Go!" message
 */

Plotly.plot(data, layout, function (err, resp) {
    if (err) return console.log("ERROR", err)

    console.log(resp)

    var plotlystream = Plotly.stream(token, function () {})
    var signalstream = Signal({tdelta: 100})


    plotlystream.on("error", function (err) {
        signalstream.destroy()
    })

    // Okay - stream to our plot!
    signalstream.pipe(plotlystream)
})