A novel approach to Web of Things:

M2M and enhanced Javascript

technologies

Vincenzo Catania, Giuseppe La Torre, Salvatore Monteleone and

Davide Patti

University of Catania

Stefano Vercelli and Fabio Ricciato

Telecom Italia S.p.A.

IEEE SN4MS 2012, Besançon, France – November 20, 2012

From IoT to WoT

Internet of Things (IoT)

Network of daily life objects (things)

Identifiable things: RFID, QR-Code

Lack of a standard communication protocol

Fields: Tracking, domotic, health

Web of Things (WoT)

Identifiable and controllable “smart things”

Things are identified by URI

Communication through RESTfull API

Future trends

Source: Cisco IBSG, 2011

Future trends

Source: Analysis Mason

WoT Platforms

REST Web technologies for API

JSON (JavaScript Object Notation)

Social Networks of Things

Cosm (Pachube)

WoT/M2M Requirements

Things discovery

Identification, position

Multi-user access

E.g. Network of temperature sensors

Privacy and access control

Health applications

Low-level abstraction

Several languages, Several hardware

The Webinos Project

The webinos project will define and deliver an Open Source Platform

and software components for the Future Internet in the form of web

runtime extensions, to enable web applications and services to be

used and shared consistently and securely over a broad spectrum of

converged and connected devices, including mobile, PC, home media

(TV) and in-car units.

Webinos features

Cross-platform

Windows, Linux, OSX, Android

Cross-domain

PC, Handsets, Entertainment, Automotive, Embedded systems (Pandaboard)

As soon: Raspberry PI

Service Discovery

User Management

Security

Webinos Personal Zones

A Personal Zone Virtually

contains a set of devices owned by a user

PZ can include non-IP

devices (BT, ZigBee)

Devices authenticate

themselves to the PZH

PZHs can be bridged for

inter-user communication

Webinos Personal Zones

Webinos Device/PZP Architecture

12

Webinos APIs

Each Device’s API can be seen as a service.

Discovery API

To access services exposed

By device

by entities directly connected to the device (e.g sensors)

by trusted entities registered in a personal zone

File API (data storage)

Messaging API (notifications)

Sensors/Actuator API

Webinos Sensors/Actuators APIs

The sensors/actuators services can be located in the

user's personal zone or be shared on the current network.

Sensors API (http://webinos.org/api/sensors)

Each sensor has a GeoPosition information

Sensor’s configuration (timeout, rate, …)

Sensor’s value can be get periodically or when it changes

Actuators API (http://webinos.org/api/actuators)

Support for: switches, motors, thermostats, …

setValue(double[], succ, fail) function

Sample code: Webinos Sensors API

webinos.discovery.findServices(new ServiceType(

'http://webinos.org/api/sensors.temperature'),

{onFound: function (service) {

temp_sensor = service;}

});

temp_sensor.sensor.configureSensor(

{rate: 2000, eventFireMode: "fixedinterval"},

successCallback, errorCallback);

temp_sensor. addEventListener(”temperature",

function (event) {

alert(“Current Temperature is “ +

event.sensorValues[0]);

},

false);

Webinos Users/Devices Management

Authentication API

User authentication

Google ID, Yahoo ID

Device authentication

Each devices has public/private key

pair

PZH acts as certificate authority

Secure communication among

devices and PZs

TLS (Transport Layer Security)

Webinos Security and Privacy

XACML-like Security policy architecture

Each API is identified by unique URI

Which entity (user/devices) can access a resource (API/data) provided by one of user’s devices (one of each inside my PZ)

Each device can be shared across several PZs but is owned by only one user

Policy editor

Automatic Policy synchronization (and conflicts notification) among devices

Supports both Access Control and Data Handling policies

Webinos Sensors Demo

Example: Webinos M2M Application

My parents’ house

My house

My PZH alerts my smartphone when something happens (e.g. burglar alarm

has been activated) in my or my parents’ house

Conclusions

WoT/M2M requirements

Webinos as platform for WoT and M2M, Webinos meets:

Hardware abstraction

Discovery

Security

User/device management

Our contribute

Specification and implementation of Sensors/Actuators API

Demo Web application