1.
Building the
Internet of Things
with Eclipse IoT
Benjamin Cabé – Eclipse Foundation
@kartben
Devoxx France - April 10, 2015

2.
Java for IoT?
● 9+ million Java developers
● Java 8 & embedded are fun
● Lots of IoT devices running on ARM
● Tooling

3.
End-to-end IoT?

4.
End-to-end IoT?

5.
End-to-end IoT?

6.
End-to-end IoT?

7.
Talking to sensors?
● Pi4J – http://pi4j.com
○ Complete access to GPIOs/I2C/SPI
○ Very mature codebase, based on WiringPi
○ Support for popular shields (PiFace, Gertboard, …)
○ Lots of code samples

8.
Talking to sensors?
Gp o on o e p o = Gp oFa o . e Ins an e();
Gp oP nD a Ou pu p n = p o.p o s onD a Ou pu P n(
Rasp P n.GPIO_01, "M LED", P nS a e.HIGH);
Th ead.s eep(5000);
p n. ow();
Th ead.s eep(5000);
p n. o e();
p o.shu down();

9.
Gateway

10.
Gateway

11.
Gateway

12.
Gateway
Connect
sensors to the world
Manage the hardware
and software running
at the edge

13.
Connect?
● CoAP
○ « HTTP over UDP »
○ Expose your device as a resource to the Internet of
Things
● MQTT
○ Publish/Subscribe model
○ More room for local processing

14.
CoAP: The web-of-things
/walk
/hand/left/raise
/eye/picture
/on
/red
/green
/blue
/mtbf
/on
/on
/buttons
/buttons/1/push
/bat-level
/engine/status
/position
/fuel
/CO2
/noise
/lights/on

15.
Eclipse Californium
● Focus on scalability and usability
● To be used in IoT cloud servers or M2M/IoT
devices running Java
● Includes DTLS implementation (Scandium),
HTTP/CoAP bridge, Plugtests, …
http://eclipse.org/californium

16.
import static org.eclipse.californium.core.coap.CoAP.ResponseCode.*;
public class MyResource extends CoapResource {
@Override
public void handleGET(CoapExchange exchange) {
exchange.respond("hello world"); // reply with 2.05 payload (text/plain)
}
@Override
public void handlePOST(CoapExchange exchange) {
exchange.accept(); // make it a separate response
if (exchange.getRequestOptions() ...) {
// do something specific to the request options
}
exchange.respond(CREATED); // reply with response code only (shortcut)
}
}

17.
MQTT: Publish & Subscribe
Sub
KETTLE232/#Pub
KETTLE232/temp
Payload:
21°C
Pub
KETTLE232/temp
Payload:
21°C
BROKER

18.
Eclipse Paho
● Open-source MQTT clients
● Pick your language!
○ Java
○ JavaScript
○ C/C++, Objective C
○ Go, Lua, Python, .NET, WinRT, …
http://eclipse.org/paho

19.
MqttClient c = new MqttClient("tcp://m2m.eclipse.org:1883",
MqttClient.generateClientId());
mqttClient.setCallback(new MqttCallback() {
@Override
public void messageArrived(String topic, MqttMessage message)
throws Exception {
// process received message
// ...
}
});
mqttClient.connect();
mqttClient.subscribe("mygateway/#");

20.
MQTT brokers
● Eclipse Mosquitto
○ C implementation
○ Scalable (1000 clients == 3MB RAM)
● Eclipse Moquette
○ Java implementation
○ Based on Netty and LMAX disruptor

21.
Manage?
● Gateway itself
○ wireless modem, firewall, …
● Applications
○ Install/Uninstall software packages
○ Start/Stop applications
● Sensors
○ H/W abstraction layer

22.
Java VM
OSGi Application Container
Device Abstraction
Gateway Basic Services
Network Configuration
Network Management Field
Protocols
Connectivity and Delivery
AdministrationGUI
Operation&Management
Linux
Hardware
App 1 App 2 App n. . . .
Applications
Eclipse Kura

23.
Installing Kura
cd ~
sudo apt-get update
wget https://s3.amazonaws.com/kura_downloads/raspbian/release/
1.1.0/kura_1.1.0_raspberry-pi_armv6.deb
sudo dpkg -i kura_1.1.0_raspberry-pi_armv6.deb
sudo apt-get install -f
sudo reboot

24.
First steps with Kura
● Network management
○ Cellular Modem, WiFi
○ Firewall
○ NAT
● OSGi and system administration
● IoT server communication settings

25.
First steps with Kura

26.
First steps with Kura

27.
First steps with Kura

28.
First steps with Kura

29.
First steps with Kura

30.
First steps with Kura

31.
First steps with Kura

32.
First steps with Kura

33.
Kura API
● OSGi services that you can re-use in your own
components
○ o Se e
○ Da aSe e, oudSe e
○ p oSe e (AES, base64, SHA-1)
○ Pos onSe e (geolocation)
○ … and many others
● And of course you can leverage a huge
ecosystem of Java and OSGi libraries

34.
Your typical Kura component
● Uses Modbus, CAN-Bus, etc. built-in device
abstraction services
○ Or implement your own service

35.
Your typical Kura component (2)
• Uses Kura built-in transport services to talk to
the cloud
– TransportService – « raw » protocol
– DataService – local storage, auto reconnect
– CloudService – optimized binary payload, advanced
device management

36.
Your typical Kura component (3)
• Implements ConfigurableComponent
– Enables configuration from the UI
– … as well as from the cloud

37.
Your typical Kura component (4)
• Bundled with other bundles/components in a
deployment package
– Zip file containing a Manifest & OSGi bundles
• Can be deployed from Kura Web UI or over the air
Read more:
http://eclipse.github.io/kura/doc/kura-setup

38.
End-user interaction
● JavaFX Charts
● Eclipse BIRT
● Smartphone app (e.g Android)
○ https://www.eclipse.org/paho/clients/android
● MQTT + WebSockets = ♡
○ https://www.eclipse.org/paho/clients/js

39.
Kura is awesome!
Go download it now!
http://eclipse.org/kura
If you had to remember only 3 things...
#1

40.
Build your own greenhouse &
follow the tutorial
http://iot.eclipse.org/java/tutorial
If you had to remember only 3 things...
#2

41.
Eclipse IoT is much more than
Kura and Java!
http://iot.eclipse.org/
If you had to remember only 3 things...
#3

42.
Get Involved!
● Open bugs / fix bugs
● Request new features
● Write articles, tutorials
● Participate on the mailing
lists
● Propose your project!

43.
Coming next?

44.
Coming next?
● Device Management
○ LwM2M, LwM2M over MQTT, IPSO Smart Objects
● Security
○ TinyDTLS
● Open-source IoT server?
○ Several members interested in defining and
implementing the OpenStack for IoT

45.
Thank you! Questions?
benjamin@eclipse.org
@kartben
http://iot.eclipse.org