code: function Device(network, addr, modelId, sensorInfos) {
    var self = this; 
    this.network = network;
    this.address = addr;
    this.modelId = modelId;
    this.deviceHandle = {};
    this.url = ['sensorjs://', network.sensorNetwork, addr].join('/');
    this.sensorUrls = [];
    _.each(sensorInfos, function(sensorInfo) {
      var url = [self.url, sensorInfo.model, sensorInfo.id].join('/');
      if (sensorInfo.options) {
        url += '?' + querystring.stringify(sensorInfo.options);
      }
      self.sensorUrls.push(url);
      if (sensorInfo.deviceHandle) { // FIXME: not to manage sensor connection 
                                     //ex. futuretek snmp device connection
        self.deviceHandle[sensorInfo.id] = sensorInfo.deviceHandle;
      }
    });
    EventEmitter.call(this);
  }
docs: /*
  Device