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M2M for Java Developers - MQTT with Eclipse Paho

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Used Software in this talk: …

Used Software in this talk:

HiveMQ MQTT Server - http://www.hivemq.com
Paho - http://www.eclipse.org/paho/

Mobile devices like smartphones and tablet computers became an integral part of our modern world and single-board computers like Raspberry Pi are cheaper today than at any time before. Simple and open Machine-to-Machine (M2M) protocols like MQTT enable these devices to communicate in an efficient manner, even in scenarios with unreliable und instable networks. This talk shows how Eclipse Paho - an Eclipse umbrella project for M2M protocols - can be utilized for professional and personal projects to build efficient and scalable solutions for (mobile) devices.

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  • 1. M2M for Java Developers MQTT with Eclipse Paho 17-07-2013 -- #democampstuttgart Dominik Obermaier -- dc-square GmbH
  • 2. Dominik Obermaier @dobermai MQTT Enthusiast loves OSS passionate Architect & Maker Co-Founder dc-square likes Open Source Hardware
  • 3. Dominik Obermaier @dobermai MQTT Enthusiast loves OSS passionate Architect & Maker Co-Founder dc-square likes Open Source Hardware K Who not?!?
  • 4. M2M?
  • 5. TECHNOLOGY THAT SUPPORTS WIRED OR WIRELESS COMMUNICATION BETWEEN DEVICES
  • 6. Why should we care?
  • 7. 2010 2015 2020 ~6.909.000.000 ~7.302.000.000 ~7.675.000.000 ~12.500.000.000 ~25.000.000.000 ~50.000.000.000 [1]Source: http://www.un.org/esa/population/publications/wpp2008/wpp2008_highlights.pdf [1] [2]Source: http://share.cisco.com/internet-of-things.html [2] “Things” in the Internet
  • 8. Things?
  • 9. Which protocol ?
  • 10. Why MQTT? ✓ Simple ✓ Efficient ✓ Publish / Subscribe ✓ Quality of Service Levels ✓ Last Will and Testament ✓ Designed for unreliable networks
  • 11. Why MQTT? ✓ Simple ✓ Efficient ✓ Publish / Subscribe ✓ Quality of Service Levels ✓ Last Will and Testament ✓ Designed for unreliable networks KWireless? Yep, then it probably is unreliable
  • 12. Publish / Subscribe
  • 13. OMG! Sounds like programming in C!
  • 14. What about Java?
  • 15. What is Paho? ✓ Scalable Open Source Implementations of M2M standard protocols ✓ Focus on MQTT ✓ Implementations in Java, Javascript, Lua and C ✓ Eclipse Incubator
  • 16. What is Paho? ✓ Scalable Open Source Implementations of M2M standard protocols ✓ Focus on MQTT ✓ Implementations in Java, Javascript, Lua and C ✓ Eclipse Incubator KRead: What is Paho at the moment
  • 17. Code! public void start() throws Exception { final String clientId = "eclipse_stuttgart_sub"; final MqttClient mqttClient = new MqttClient(BROKER_URL, clientId, new MemoryPersistence()); mqttClient.setCallback(new SubscribeCallback(mqttClient)); mqttClient.connect(); mqttClient.subscribe(TOPIC_SUBSCRIPTION, QUALITY_OF_SERVICE_LEVEL); }
  • 18. Moar Code! public class SubscribeCallback implements MqttCallback { @Override public void connectionLost(Throwable cause) {} @Override public void deliveryComplete(MqttDeliveryToken token) {} @Override public void messageArrived(MqttTopic topic, MqttMessage message) throws Exception { System.out.println("Message arrived. Topic: " topic.getName() + ", QoS: " + message.getQos() + ", message: " + new String(message.getPayload(), Charset.forName("UTF-8"))); } }
  • 19. DEMO!
  • 20. Other Eclipse M2M Projects
  • 21. Credits ✓ Scared Cat Picture by http://www.flickr.com/photos/ dat-pics/ ✓ Thanks Vincent Le Moign for the awesome Icon Set ✓ Rest of pictures licensed from different people from 500px.com ✓ MQTT Logo by http://www.mqtt.org

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