Making things that work with us - Distill

transcript

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

We #code

@matteocollina

We are no Jedi

We #code apps

Did you see it coming

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

Thanks.

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

They didn’t!

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

This message comefrom the server!

Cancel

Web ServerTap

We #code a remote web server

Web and Mobile apps are based on

REpresentationalState Tranfer = REST

What's next(hint: it's a big number)

X0.000.000.000

Number of connected“things” by 2020:

X0.000.000.000

Number of connected“things” by 2020:

1.000.000.000

Number of smartphones users in 2012

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

Things are different

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/

http://www.flickr.com/photos/jurvetson/2798315677

Control my house from GTalk or Twitter

I want to chat with my house

>: hi househi matteo

>: what's the temperature?36

>: turn airconditioning onconsider it done!

>: 4 8 15 16 23 42

Enter Hubot

A programmable robotthat can receive commands through chat

We can supercharge my house with hubot

My house needs to:

1. publish sensed data to the web

2. receive commands from the web

Our controlroom is in the

Cloud How can we send and receive the updates

In order to send commands to Things from the Web, we need to:

1. subscribe the Thing to some event

2. publish the new event

The world is event

based, too!

In order to publish live data, we need to:

1. sense it

2. send it in the cloud

3. build a web API to access it

Pidgeons are not a communication protocol

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

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)

• Offline/Disconnected mode

• 93x faster throughput

• 11.89x less battery to send

• 170.9x less battery to receive

• 1/2 as much power to keep connection open

• 8x less network overhead

MQTT vs HTTPS for Mobile Push Notifications

Source: http://mobilebit.wordpress.com/2013/05/03/rest-is-for-sleeping-mqtt-is-for-mobile/

How to use

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 “thing” speaks MQTT.Your App speaks HTTP.

Your App cannot serve two masters.

We need a Bridge between the Web and the

“Things” world

(bridge in Italian)http://eclipse.org/proposals/technology.ponte/

http://github.com/mcollina/ponte

A M2M/IoT bridge for REST developers

• MQTT broker

• REST interface

• can be deployed on top of a lot pub/sub systems and databases

• built in node.js

ponte’s pillars

• Node.js

• Ascoltatori, the pub/sub library for node backed for every broker out there! npm.im/ascoltatori

• Mosca, the multi-transport MQTT broker for node.js. npm.im/mosca

• MQTT.js, the MQTT library for node: npm.im/mqtt

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

TL;DR• The Internet of Things

will be big

• Devices need binary formats and pub/sub protocols

• Apps are built on top of REST APIs

• Ponte does both

Matteo Collina (matteo.collina2@unibo.it)

Thank You!

@matteocollina

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

Making things that work with us - Distill

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