chrome serial port implementation for node serialport

serialport.js

/*global chrome*/
var EventEmitter = require('./events.js').EventEmitter;
var util = require('./util.js');

function SerialPort(port, options) {


  var self = this;
  var id;
  var bytesToRead = options.buffersize || 1;
  var reading = false;

  function onOpen (info) {
    console.log('onOpen', info);
    if(info){
      id = self.id = info.connectionId;
      if (id < 0) {
        self.emit("error", new Error("Cannot connect to " + port));
        return;
      }
      self.emit("open");
      chrome.serial.onReceive.addListener(function(obj){
        if(id == obj.connectionId){
          var data = new Uint8Array(obj.data);
          self.emit("data", data);
        }
      });
    }else{
      console.log('can\'t connect to ', port);
    }

  }


  chrome.serial.connect(port, {
    bitrate: options.baudrate || 9600
  }, onOpen);

}

SerialPort.prototype.write = function (data) {
  function onWrite() {
    // log("onWrite", arguments);
  }

  data = new Uint8Array(data);
  // console.log("OUT", data);
  chrome.serial.send(this.id, data.buffer, onWrite);
};

util.inherits(SerialPort, EventEmitter);

exports.SerialPort = SerialPort;