#JCConf

Java Embedded 與 Raspberry Pi

張益裕@michaelandjava

恆逸教育訓練中⼼心講師

Agenda

•Internet of Things

•Java Embedded 8

•Raspberry Pi

Man-to-Machine

Machine-to-Machine

Internet of Things

•Computer-based but unlike desktop computer and their applications

•They are dedicated, not general purpose

•They are custom hardware

Headless Embedded System

Headfull Embedded System

Java Embedded System

•Java Platform, Standard Edition (Java SE 8)

•Java SE Embedded 8

•Java ME Embedded 8

•Java Card

Java Embedded FrameworkPl

atfo

rm F

ootp

rint

Java Card Java ME Embedded Java SE Embedded

Java SE 8

•Java Platform, Standard Edition (Java SE 8)

•Java SE Embedded 8

•Java ME Embedded 8

•Java Card

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

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

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

Java ME EmbeddedPl

atfo

rmRu

ntim

eTools

Services

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

Raspberry Pi Family

Raspberry Pi Zero

65mm

30mm

Development Board

•Cubieboard

•Beagleboard

•Banana Pi

Java and Raspberry Pi

Java Embedded + RPi + EV3

Smart Parking System

NFC Reader

Raspberry Pi

Lego Mindstorms EV3

Parking Space

Smart Parking System Demo

Online Order

Web ApplicationHTTP  Request

HTTP  Response

Touch and Take

Embedded AppWeb Application

HTTPNFC

•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

PiCommander

Remote Controller

MQTT

Remote Controller

Subscribe

GPIO 1,ONGPIO 1,OFF

GPIO 1,ONGPIO 1,OFF

Publish

Remote Controller

Remote Listener

MQTT

Remote Listener

Subscribe

Subscribe

Subscribe

GPIO 5,ON

GPIO 5,ON

GPIO 5,ON

GPIO 5,ON

Publish

Remote Listener

Demo

Thanks

•github.com/macdidi5

• Smart Parking System

• PiCommander - Java Embedded and Android

• PiTurtleCar - Bluetooth RC Car