This document discusses using Java Embedded with the Raspberry Pi for Internet of Things applications. It provides an overview of Java Embedded 8, including Java SE Embedded and Java ME Embedded. It then introduces the Raspberry Pi as a low-cost development board that is well-suited for embedded Java applications. An example smart parking system is presented that uses a Raspberry Pi, NFC reader, and LEGO Mindstorms EV3 to control parking spaces via an embedded Java app and web application.

1. #JCConf
Java Embedded 與
Raspberry Pi
張益裕
@michaelandjava
恆逸教育訓練中⼼心講師

2. Agenda
• Internet of Things
• Java Embedded 8
• Raspberry Pi

3. Man-to-Machine

4. Machine-to-Machine

5. Internet of Things
• Computer-based but unlike desktop
computer and their applications
• They are dedicated, not general purpose
• They are custom hardware

6. Headless Embedded System

7. Headfull Embedded System

8. Java Embedded System
• Java Platform, Standard Edition (Java
SE 8)
• Java SE Embedded 8
• Java ME Embedded 8
• Java Card

9. Java Embedded FrameworkPlatformFootprint
Java Card Java ME Embedded Java SE Embedded

10. Java SE 8
• Java Platform, Standard Edition (Java
SE 8)
• Java SE Embedded 8
• Java ME Embedded 8
• Java Card

11. Java SE Embedded 8
• Internet of Things Applications
• New Java 8 language features
• Headless and Headful Support
• Performance optimizations for ARM processor-
based systems
• Compact Profiles
• Minimal JVM

12. Custom JRE
Optional Components
Compact3 Class
Libraries
Compact2 Class
Libraries
Base Compact1 Classes
Hotspot VM
UI and Toolkits
Integration Libraries
Other Base Libraries
Lang and Util
Libraries
Hotspot VM
Compact Profiles Full JRE
3
2
1

13. Java ME Embedded 8
• Java runtime based on Java ME CLDC 8
• Java ME Embedded Profile (MEEP) 8
• Optimized for Embedded
• Device I/O APIs
• Headless Embedded System

14. Java ME EmbeddedPlatformRuntime
ToolsServices

15. Raspberry Pi
• Low cost, credit-card size computer
• A capable little device
• Enables people of all ages to explore
computing and programing
• Interact with the outside world

16. Raspberry Pi Family

17. Raspberry Pi Zero
65mm
30mm

18. Development Board
• Cubieboard
• Beagleboard
• Banana Pi

19. Java and Raspberry Pi

20. Java Embedded + RPi + EV3

21. Smart Parking System
NFC Reader
Raspberry Pi
Lego Mindstorms EV3
Parking Space

22. Smart Parking System Demo

24. Online Order
Web Application
HTTP
Request
HTTP
Response

25. Touch and Take
Embedded App
Web Application
HTTPNFC

27. • MQTT is a machine-to-machine
(M2M)/"Internet of Things"
connectivity protocol.
• It was designed as an extremely
lightweight publish/subscribe
messaging transport.
M2M Protocol

28. PiCommander

29. Remote Controller
MQTT

30. Remote Controller
Subscribe
GPIO 1,ON
GPIO 1,OFF
GPIO 1,ON
GPIO 1,OFF
Publish

31. Remote Controller

32. Remote Listener
MQTT

33. Remote Listener
Subscribe
Subscribe
Subscribe
GPIO 5,ON
GPIO
5,ON
GPIO
5,ON
GPIO 5,ON
Publish

34. Remote Listener

35. Demo

36. Thanks
• github.com/macdidi5
• Smart Parking System
• PiCommander - Java Embedded and Android
• PiTurtleCar - Bluetooth RC Car