Download pdf - Exposing M2M to the REST of us

Exposing M2Mto the REST of us

@matteocollina

Matteo Collina

Ph.D. Student @ University of Bologna

@matteocollina matteocollina.com

http://500px.com/photo/20389019

We are #coders




We are no Jedi




We #code apps



Did you see it coming

http://www.flickr.com/photos/12738000@N00/360231193/

Stevedid.

http://www.flickr.com/photos/noppyfoto/6216399465/

Thanks.

http://www.flickr.com/photos/noppyfoto/6216399465/

They didn’t!

...

We don’t #code for this phone anymore!

7:11 PMiPad

How do we #code an App?

7:11 PMiPad

We #code a response to some kind of user action

Pop-up Dialog

OK

This message comefrom the server!

Cancel

Web ServerTap

We #code a remote web server

Web and Mobile apps are based on

HTTP

REST

REpresentationalState Tranfer = REST


Things are different




In the future, this chain will be connected to the Internet




We want to #code the (real) world.



Arduino is an open source microcontroller that you can use to hack things

http://www.flickr.com/photos/mattrichardson/5029708468/

The Internet is our pillar


we want to monitor the seating of this room?

What if




we measure people’s emotions?

Can



When you sit,we can receive

an event

The world is event based!

Our controlroom is in the Cloud

How can we make Things talk?

http://www.flickr.com/photos/iboy_daniel/77412822/in/photostream/



Pidgeons are not a communication protocol

See RFC1149http://500px.com/photo/32895129

http://tools.ietf.org/html/rfc1149

http://tools.ietf.org/html/rfc1149



http://www.flickr.com/photos/clearlyambiguous/48185613/

HTTP is slow and safe




We need a fast, binary protocol

http://www.flickr.com/photos/grrphoto/305649629



• Binary

• Publish/Subscribe

• Free

• Standard (in a few months)

How to use

on

Download PubSubClient, the library for

on Arduino: Setup

String server = String("qest.me");

PubSubClient client = PubSubClient(server, 1883, callback);

if (!client.connected()) { client.connect("arduino");}client.loop();

char s[10];itoa(get_temperature(), s, 10);client.publish("temp", s);

on Arduino: publishing

if (!client.connected()) { client.connect("arduino");}client.loop();

char s[10];itoa(get_temperature(), s, 10);client.publish("temp", s);

This is called a topic, and it is where we publish

data on MQTT.

on Arduino: publishing

Your app cannot serve two masters.




QESTA MQTT/REST bridge

qest.me

http://qest.me

http://qest.me

http://github.com/mcollina/qest






























• MQTT broker

• REST interface

• can be deployed on top of very pub/sub systems

• built in node.js

QEST

REST Server

Redis

MQTT Server

QEST

Data Layer

HTTP Clients MQTT Clients

• Ascoltatori: the pub/sub library for node backed by Redis, MongoDB, AMQP (RabbitMQ), ZeroMQ, MQTT (Mosquitto) or just plain node: https://github.com/mcollina/ascoltatori

• Mosca, the multi-transport MQTT broker for node.js. It supports AMQP, Redis, ZeroMQ or just MQTT: https://github.com/mcollina/mosca

• MQTT.js, the MQTT library for node: https://github.com/adamvr/MQTT.js

QEST’s pillars

https://github.com/mcollina/ascoltatori




https://github.com/mcollina/mosca

https://github.com/mcollina/mosca

https://github.com/adamvr/MQTT.js




Strings are the most common data format.




Not these strings.




Strings are not the better way of sending data

What else

There are LOTs of choices

• JSON

• MessagePack

• BSON

• Bysant

• Protobuf

Size matters if we pay for every byte sent!



Developers think in Lists and Maps, not in nodes and children.

XML will not play a major role in the Internet of

Things

• What devices can a user monitor?

• What devices can 'listen' to the state of other devices?

• Who can access the devices state?

• Is the communication secure?

Security Issues

We need to interconnect UsersSocial profiles tothe Devices!


We need a Bridge between the REST and the

“Things” world




• Multiple communication protocols

• Data representation

• Security and provisioning

We need to address:

From an end-user perspective

(bridge in Italian)

http://eclipse.org/proposals/technology.ponte/



The initial contribution is QEST

will play well with the others

http://www.flickr.com/photos/oneaustin/1261907803

DEMO!




Ruby on Rails has drastically changed how web apps are

built

A 10-minutes blog video changed everything




We aim to a Rails-like

experience for the IoT

Our goal is to deliver a10-minutes M2M app video



Credits• Font Awesome for the

Icons.

• Flickr and 500px for LOTS of CC images :).

• Keynotopia for the iPad mockups

http://fortawesome.github.com/Font-Awesome/

http://fortawesome.github.com/Font-Awesome/

Matteo Collina ([email protected])

Thank You!

@matteocollina

http://www.flickr.com/photos/axel-d/479627824/


Bridging two worlds




