ThingをDiscoverしてBeam ref: http://qiita.com/kntyskw/items/bf10475c045199b35982

file0.txt

$ npm install node-upnp-ssdp upnp-device-client

file1.txt

var ssdp = require('node-upnp-ssdp');
var UPnPDeviceClient = require('upnp-device-client');

ssdp.on('DeviceFound', function(info){
  var client = new UPnPDeviceClient(info.location);
  client.getDeviceDescription(function(err, device){
    if (!err){
      console.log('UPnP: Device ' + device.friendlyName + ' found');
    } else {
      console.error('UPnP: ' + err);
    }
  });
});

ssdp.mSearch('upnp:rootdevice');

file2.txt

var ssdp = require('node-upnp-ssdp');
var UPnPDeviceClient = require('upnp-device-client');
var mqtt    = require('mqtt');

var mqttClient = mqtt.connect('mqtt://beam.soracom.io');

var publish = function(udn, device){
  var event = {
    reported: {
      devices: {}
    }
  };
  event.reported.devices[udn] = device;
  mqtt.publish('$aws/things/kenta-upnp-gateway/shadow/update', 
    JSON.stringify(device));
};

ssdp.on('DeviceFound', function(info){
  var client = new UPnPDeviceClient(info.location);
  client.getDeviceDescription(function(err, device){
    if (!err){
      device.online = true;
      publish(device.UDN, device);
    } else {
      console.error('UPnP: ' + err);
    }
  });
});

ssdp.mSearch('upnp:rootdevice');

file3.txt

ssdp.on('DeviceUnavailable:upnp:rootdevice', function(info){
  var udn = info.usn.split('::')[0];
  publish(createDevicePresense(udn, {online: false}));
);

file4.txt

var topicDevicesRoot = '$aws/things/kenta-upnp-gateway/devices'
mqttClient.on('connect', function () {
  mqttClient.subscribe(topicDevicesRoot + '/#');
});

mqttClient.on('message', function (topic, buffer) {
  if (topic.indexOf(topicDevicesRoot) === 0){
    executeAction(getContextFromTopic(topic),
        JSON.parse(buffer.toString()));
  } else {
    console.error('MQTT: Unknown message received on topic ' + topic);
    console.error(buffer.toString());
  }
});

file5.txt

$ mosquitto_pub -h beam.soracom.io -t '$aws/things/kenta-upnp-gateway/devices/<TVのUUID>/RenderingControl/SetVolume' -m '{"InstanceID": 0, "Channel": "Master", "DesiredVolume": 26}'