Building the Internet of Things with Eclipse IoT - IoTBE meetup

BUILDING THE INTERNET OF THINGS WITH ECLIPSE IOT Benjamin Cabé, Eclipse Foundation @kartben

"Kortrijk Begijnhof and Our Lady's" by Michael O'Donnabhain

M2M? IoT?

❝ Technology that supports wired or wireless communication between devices

http://www.flickr.com/photos/brunauto/5687363705

fragmentation

lock-in

http://www.flickr.com/photos/photosightfaces/8152791780/

http://www.flickr.com/photos/90514086@N00/952121271/ http://www.flickr.com/photos/cyberslayer/952121271

complexity

Protocols

Tools

Frameworks

Services

Hand by Castor & Pollux from The Noun Project

AT FIRST THEY WERE THREE…

Paho provides client implementations of the MQTT protocol.

Mihini is an embedded Lua runtime providing HW abstraction and other services.

Koneki provides tools for embedded Lua developers.

Eclipse SCADA is a complete Java/OSGi-based SCADA system (communication, monitoring, GUI, …)

Kura is a Java/OSGi-based M2M container for gateways. Has support for Modbus, CANbus, MQTT, …

Mosquitto is a lightweight server implementation of the MQTT and MQTT-SN protocols, written in C.

Ponte bridges M2M/IoT (MQTT, CoAP) protocols to the Web.

SmartHome provides a complete set of services for home automation gateways.

OM2M implements the ETSI M2M standard.

(code pending)

Californium is an implementation of the CoAP protocol written in Java. Includes DTLS for security.

Wakaama is an implementation of LWM2M written in C.

Krikkit is a rules system for programming edge devices just like you’d configure a router

Wakaama

Krikkit

(code pending)

(code pending)

(code pending)

Concierge is a lightweight implementation of OSGi Core R5.

Your project? J

Concierge

We need to talk! ;-)

I often get asked…

WHAT IS ZE BEST LANGUAGE FOR

IOT?!?

I often get asked…

ANSWER: It depends! J For embedded systems…

Co

de

vs.

C

on

figu

rati

on

Constrained micro-controllers vs. Smart gateways

C Javascript Lua Java/OSGi

ANSWER: It depends! J In

fras

tru

ctu

re

v

s.

A

pp

. dev

elo

pm

ent

Communication enablement vs. Information systems

On the server side…

C Javascript Java/OSGi

BUILDING BLOCKS FOR IOT

BUILDING BLOCKS FOR IOT … for building what?

Cloud by Andrew Lynne from The Noun Project Thermometer by Lemon Liu from The Noun Project

Fluorescent Light Bulb by Dmitriy Lagunov from The Noun Project Water by Gilad Fried from The Noun Project

MQTT Network

Mosquitto broker

Building… SENSOR NETWORKS

MQTT?

M is for Messaging… (mmmmaybe!)

Q is not for Queue ☺︎

Publish/Subscribe protocol

Lightweight (bandwidth, battery, …)

21.3

21.3

MQTT history

•  … it’s not new!

•  Invented in 1999 (Andy Stanford-Clark, Arlen Nipper)

•  Royalty-free since 2010

•  Being standardized at OASIS since 2013

Neat MQTT features

•  Wildcards

•  Quality of Service

•  Last Will & Testament

•  Retained Messages

MQTT Features | Wildcards

•  The number sign (#) is a wildcard character that matches any number of levels within a topic.

•  The plus sign (+) is a wildcard character that matches only one topic level

Examples

mygreenhouse/sensors/#

+/sensors/temperature

MQTT Features | QoS

•  QoS flag allows to control the level of assurance for delivery you want when publishing a message to the broker

MQTT Features | QoS 0


•  A message published with QoS=0 will be received at most once (“fire & forget”) by subscribed clients



•  A message published with QoS=1 will be received at least once (acknowledged delivery) by subscribed clients



•  A message published with QoS=2 will be received exactly once (assured delivery) by subscribed clients

MQTT Features | Last Will & Testament

•  IoT devices can come & go on the network quite often and in a very unpredictable way

•  Last Will & Testament allows to notify interested parties to an abnormal disconnection of a client

•  The Last Will & Testament (if any) is part of the initial connection message

MQTT Features | Retained messages

•  The Retained flag allows a published message to be stored on the broker, so as possible receivers can subscribe later and still receive the message

Real world example… and demo!

21.3

21.3

Is the MQTT API that simple?

Is the MQTT API that simple? MqttClient mqttClient = new MqttClient ( "tcp://iot.eclipse.org:1883", MqttClient.generateClientId() );

mqttClient.setCallback(…);mqttClient.connect();mqttClient.subscribe("myGreenhouse/#");// the rest of your app

Is the MQTT API that simple?

mqttClient.setCallback(new MqttCallback() {@Overridepublic void messageArrived(String topic, MqttMessage message) throws Exception { // process received message // e.g. display temperature value}// ...

});

Callback code:

Data viz. w/ MQTT over Websockets

•  Rickshaw is a JavaScript toolkit for creating interactive time series graphs

•  It’s built on top of d3.js

•  MQTT over Websockets makes it very easy to feed data into Rickshaw datasets… perfect for IoT!

– More at http://code.shutterstock.com/rickshaw, lots of examples to get started



MQTT Network

Ponte broker

CoAP Network

Building… SENSOR NETWORKS (2)

CoAP: Constrained Application Protocol

•  Internet Eng. Task Force standard for the Internet of Things.

•  Started in 2010!

•  Draft-18 is the final one.

Co: Constrained

•  Simple to encode: targets 8 bits MCU.

•  UDP based, targets low power IP networks.

•  Two level of QoS: confirmable message or not.

•  Simple observation mechanism.

CoAP: RESTful things!

•  REST paradigm for things: – URI: coap://hostname/lamps/12/status

•  HTTP like verbs: – GET for reads

– POST, PUT, DELETE for mutation

– … but in a compact binary datagram.

Co: Constrained

.0 1 2 3 .0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Ver| T | TKL | Code | Message ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Token (if any, TKL bytes) ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Options (if any) ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |1 1 1 1 1 1 1 1| Payload (if any) ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

CoAP: Discoverability GET coap://hostname/.well-known/core

à Provides a list of all supported resources!

CoAP: Security

•  DTLS (TLS on UDP Datagrams)

•  Pre-shared key or not

•  DTLS is not really light :(

Device management Secure, monitor, manage fleet of

deployed devices.

•  Configure the device.

•  Update the firmware (and maybe the app)

•  Monitor and gather connectivity statistics

Lightweight M2M

•  A new Open Mobile Alliance standard

•  An OMA-DM successor for M2M targets

Lightweight M2M: CoAP

•  Built on top of CoAP:

•  Really lighter than OMA-DM or TRS-069.

LWM2M features

•  Firmware upgrades (in band or thru HTTP)

•  Device monitoring and configuration

•  Server provisioning (bootstraping)

LWM2M SMS

•  SMS can be used for waking-up the device.

•  Or for any GET/POST/PUT!

LWM2M: standard objects – Device

– Server

– Connectivity monitoring

– Connectivity statistics

– Location

– Firmware

The objects have a numerical identifier (saves bytes…)

LWM2M the URLs

URLs:

/{object}/{instance}/{resource

Ex: /6/0 à whole position object (binary TLV)

x /6/0/2 à only the altitude value

DEMO

•  Copper, a Firefox plug-in for CoAP

•  Eclipse Wakaama, a LWM2M client

•  Leshan, a LWM2M server



CoAP Network

LWM2M server (e.g. Leshan)

wakaama wakaama

wakaama

Building… DEVICE MANAGEMENT

battery level avail. memory …

firmware reboot …

Android UI

X10

Serial …

Bluetooth

Building… HOME AUTOMATION

In a nutshell

•  MQTT is a very versatile protocol for building your IoT solution from the ground up. You should try it!

•  Eclipse IoT has lots of projects, from basic building blocks to more complete solutions

•  We have cool Java projects… among many others! J

Join us at EclipseCon France!

http://eclipsecon.org/france2014

http://iot.eclipse.org

http://iot.eclipse.org

<[email protected]> @kartben

Thanks! Questions?

Building the Internet of Things with Eclipse IoT - IoTBE meetup

Technology

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