Java User Group Freiburg - Internet of Things für Java-Entwickler
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The document presents a presentation by Generative Software GmbH aimed at Java developers, focusing on the Internet of Things (IoT). It covers topics such as IoT architecture, the role of gateways, and a live demonstration of a smart greenhouse project using various technologies including Eclipse IoT and MQTT. The presentation also details the requirements and implementation steps for the smart greenhouse, illustrating the integration of sensors, actuators, and data processing frameworks.
![MQTT
24Generative Software GmbH
[account-name]/[client-id]/[app-id]/[resource-id]
Subscription Wildcards
# … e.g. client-id/app-id/#
client-id/app-id/temperature
client-id/app-id/plant/light
client-id/app-id/plant/moisture
+ … e.g. client-id/app-id/+/light
client-id/app-id/plant/light
Do not subscribe to # (all messages)](https://image.slidesharecdn.com/2018-03-05-pre-jugf-internetofthingsforjavadevelopers-180306102326/85/Java-User-Group-Freiburg-Internet-of-Things-fur-Java-Entwickler-24-320.jpg)
Java User Group Freiburg - Internet of Things für Java-Entwickler
- 1. Generative Software GmbH Java User Group Freiburg 5. März 2018 Internet of Things für Java-Entwickler 1
- 2. Agenda What is IoT? IoT Gateway with Eclipse IoT The Story of the Smart Greenhouse Live-Demo of the Smart Greenhouse The Architecture of an IoT Gateway 2Generative Software GmbH
- 3. What is IoT? 3Generative Software GmbH
- 4. Goals of IoT Solutions Transparency – what is going on? Traceability – what was going on? Prediction – what will be going on? Emergency – what is badly wrong? Optimization – what to do to improve processes? Agility – what intervention makes sense? Automation – what can be done by machines? 4Generative Software GmbH
- 5. Sensor Categories 5Generative Software GmbH Gateway, Server, Cloud Passive Active – Always On Active – Wake Up Gateway, Server, Cloud Gateway, Server, Cloud Microprocessor
- 6. Where to use Sensor Data 6Generative Software GmbH Time Frame On Device (Edge) On Stream (Fog) In Batch (Cloud) Hours to Weeks In Database Strategic Insight Machine Learning Minutes to Hours In Process Performance Insights Summary Statistics Seconds to Minutes Operational Insight Rules Engine Microseconds to Seconds Signal Processing IoT Gateway
- 7. Protocols 7Generative Software GmbH HTTP CoAP AMQP XMPP MQTT Architecture Request/Response Request/Response Point-to-Point Publish/Subscribe Request/Response Publish/Subscribe Publish/Subscribe Representation Text, Binary Binary Binary Text Binary Transport TCP UDP TCP TCP TCP Security (Transp.) TLS DTLS TLS TLS TLS Discovery No Yes No No No Scope Device-to-Cloud Device-to-Device Device-to-Cloud Cloud-to-Device Device-to-Cloud Cloud-to-Device Device-to-Cloud Cloud-to-Device Suitable for Constr. Devices Possibly Yes Possibly Possibly Yes Server Updates Pull Pull, Push Push Push Push
- 8. Networks 8Generative Software GmbH Data Unit OSI Layer Examples Host/Service Layers Data Application HTTP, FTP, ‚IoT Protocols‘ Peer-to-Peer Protocols Presentation TLS, SSL Session NetBIOS Segment/Datagram Transport TCP, UDP Network Protocols Device/Media Layers Packet/Datagram Network IP, ARP, ICMP, IPSec Frame Data Link Ethernet, ATM, PPP Bit Physical Ethernet, WiFi, USB, Bluetooth, SPI, I2C
- 9. Eclipse IoT 9Generative Software GmbH Working Group – Members: 39 (Mar 2018), RedHat, SAP, Intel, Bosch, Canonical, Cloudera, DB Systel, Huawei, IBM, Siemens, Sierra Wireless, … – Community: IoT Testbeds, Youtube, Meetups, Whitepapers, Surveys, Conferences, Open IoT Challenge … Technology – Eclipse Projects: Paho, Kura, Californium, Mosquitto, Vorto, Milo, Kapua, Hono, HawkBit, … – Standards: CoAP, MQTT, OPC UA, OMA LWM2M, … – Programming Languages: Java, C, C++, Python, …
- 10. OSGi 10Generative Software GmbH Originally: Open Services Gateway initiative Today: OSGi Alliance (defines APIs and Test Cases) Open, modular and scalable „Service Delivery Platform“ Java-based Well-known Open Source Frameworks: – Knoplerfish – Eclipse Equinox – Apache Felix – Concierge Modularization with so-called „Bundles“ Visibility of Java Packages Semantic Versioning of Java Packages (Declarative) Services
- 11. Smart, Smarter, … 11Generative Software GmbH
- 12. Requirements for the IoT Greenhouse Show all Sensor Values on a Display Control Plant Lamp depending on Luminocity Control Water Pump depending on Soil Humidity Control Heating depending on Air Temperature Switch on a Buzzer when Gas Sensor detects Gas Send Sensor Data to a Server and store it there 12Generative Software GmbH
- 13. Buy an IKEA Mini Greenhouse … 13Generative Software GmbH
- 14. … assemble it … 14Generative Software GmbH
- 15. … fill it with Hardware … 15Generative Software GmbH
- 16. … add Software to it … 16Generative Software GmbH
- 17. … connect it with a Network … 17Generative Software GmbH
- 18. … and ready is the Smart Greenhouse
- 19. Software Stack Eclipse IoT Kura (IoT Gateway Software, Java+OSGi) Mosquitto (MQTT Broker) Paho (MQTT Client) Californium (CoAP) Jakarta EE JAX-RS JAXB JSF Servlets EJB JPA 19Generative Software GmbH
- 20. The Smart Greenhouse - Details 20Generative Software GmbH IoT Gateway (Raspberry Pi 2) Kura, Paho, Californium IoT Server Paho, Californium Glassfish 4.1 Java EE Network Connection Sensors MQTT Broker Mosquitto Actuator „LED Strip“ Hose to Actuator „Pump“ LCD Display
- 21. What shall the IoT Solution do? 1. Read Sensors with the Kura IoT Gateway 2. Execute Business Logic with the Kura IoT Gateway 3. Send Sensor Data to Mosquitto with Paho (MQTT) 4. Collect Sensor Data with Paho and Servlets 5. Persist Sensor Data by Means of a REST API (JAX-RS, EJB, JPA) 6. Display Sensor Data by Means of a JSF Web App (uses same REST-API) 7. Control Actuators with a JSF Web App and Californium (CoAP) 8. Execute Business Logic on a Server with Paho and EJBs 21Generative Software GmbH
- 22. Live Demo! 22Generative Software GmbH
- 23. MQTT (Message Queue Telemetry Transport) 23Generative Software GmbH Message Broker Publisher Subscriber publish to … client-id/app-id/temperature subscribe to … client-id/app-id/temperature 1 2 SubscriberPublisher
- 24. MQTT 24Generative Software GmbH [account-name]/[client-id]/[app-id]/[resource-id] Subscription Wildcards # … e.g. client-id/app-id/# client-id/app-id/temperature client-id/app-id/plant/light client-id/app-id/plant/moisture + … e.g. client-id/app-id/+/light client-id/app-id/plant/light Do not subscribe to # (all messages)
- 25. CoAP (Constrained Application Protocol) 25Generative Software GmbH CoAP Server CoAP Client GET request: coap://<CoAP-Host>:5683/temperature response GET PUT POST DELETE 1 2 3
- 26. OSGi Container Eclipse Kura Paho CoAP OpenJDK I/O Californium … Paho Publisher Device Service Simulation MQTT Service Interfaces Legende Service-Aufrufe Data Flow OSGi Bundle Simulationsdaten Sensordaten simulieren und verschicken 26Generative Software GmbH
- 27. OSGi Container Eclipse Kura Paho CoAP OpenJDK I/O Californium … Paho Publisher Business Logic Device Service Simulation MQTT Service Interfaces Legende Service-Aufrufe Data Flow OSGi Bundle Simulationsdaten Gateway-Logik simulieren 27Generative Software GmbH
- 28. Device Access with Java OpenJDK Device I/O: GPIO, I2C, UART, SPI TinyB: Bluetooth LE Pi4J: Object-Oriented API to access I/O Capabilities of Raspberry Pi 28Generative Software GmbH
- 29. Kura Eclipse Kura Paho CoAP OpenJDK I/O Californium … Kura Data Service Device Service MQTT Service Interfaces Legende Service-Aufrufe Data Flow OSGi Bundle Echte Sensordaten verschicken 29Generative Software GmbH
- 30. Kura Eclipse Kura Paho CoAP OpenJDK I/O Californium … Kura Data Service Business Logic Device Service MQTT Service Interfaces Legende Service-Aufrufe Data Flow OSGi Bundle Gateway-Logik implementieren 30Generative Software GmbH
- 31. Tutorials on Github and Bitbucket 31Generative Software GmbH Eclipse Tutorial: github.com/kartben/kura-greenhouse-demo Greenhouse Tutorial: bitbucket.org/jenerateit/tutorial-smart-greenhouse Tutorial IOTDEV-Kurs: bitbucket.org/jenerateit/tutorial-smart-production-monitoring
- 32. Thank you! Summary Questions Outlook 32Generative Software GmbH Marcus Munzert CEO and President munzert@generative-software.com Generative Software GmbH Cornelia-Schlosser-Allee 15 79111 Freiburg Germany www.generative-software.de www.virtual-developer.com