Programming the Real-world

Introduction to SPOT

Peng Deng

CSSE University of MelbourneLabSUM∑

2

Agenda• Introduction

– Evolution of Computing– WSN

• Sun SPOT– What is SPOT– Hardware and Software– Applications

• My Projects– Game Panel– Virtual Controller– Gesture Recognition

• Simple Tutorial

• Conclusion

3

Evolution of Computing

1

1960s: Mainframe Era

One computer per many users.

2

1980s: Personal Computer Era

One computer per user.

4

Evolution of Computing [cont.]

2

1980s: Personal Computer Era

One computer per user.

3

2000s: Mobility Era

Several computers per user.

5

Evolution of Computing [cont.]

3

2000s: Mobility Era

Several computers per user.

What comes

NEXT?

6

Evolution of Computing [cont.]

3

2000s: Mobility Era

Several computers per user.

4

2020 and beyond: Ubiquity Era

Thousands of computers per user.

7

Ubiquitous Computing

• Or pervasive computing, ambient intelligence, everyware, physical computing, the Internet of Things, haptic computing

• Characteristics– embedded– context aware– personalized– adaptive– anticipatory

• Wireless Sensor Network is one candidate

8

Wireless Sensor Network• Small-scale sensor nodes• Wireless communication• Large scale of deployment• Unattended operation• ……

• Environmental monitoring

• Security

• Defence• Bioinformatics and health

• Transportation management

• Chemical detection and emergency response

9

The Timeline of WSN

Microsoft: Smart Personal Objects TechnologySun: Small Programmable Object Technology

10

What is Sun SPOT• Embedded Development Platform

– Flexible hardware and software

• Easy to program – Java top to bottom– User programs the device entirely in Java – Using standard Java tools

• Connected – Wireless Communication– Mesh networking

– Over the Air Programming

• Mobile– Built in battery charged through USB

• Aware and Active– Able to sense and affect surroundings

• Secure– Built-in asymmetric cryptography

• Open Source– Software -- Hardware

11

Sun SPOT Hardware

Antenna

2.4 GHz IEEE 802.15.4 Radio Module

180 MHz 32 bit

ARM920T core512K RAM4M Flash

Daughter board connector

Power switch

USB interface with mini-B connector

12

Sun SPOT Hardware [cont.]

8 3-colors LEDs Switches

Light sensor 3-D

Accelerometer

Analog in 4-5

Replicated switches "High" current outputsDigital I/O

Digital I/O 0-3 Analog inputs

Temperature sensor andA/D converter

13

Sun SPOT Software

• Squawk Virtual Machine

– J2ME CLDC 1.1 (cellphone without display)

– Runs on bare metal (No OS)

– Designed for memory constrained devices

– Runs multiple applications (concurrently)

• IDE Supported– NetBeans, Eclipse, …… any IDE you familiar with

14

Applications

15

ApplicationsAutonomous Deployment

16

ApplicationsRobot

17

ApplicationsSwarms

Autonomous Light Air Vessels•Cell phone vibration motor to propel

•Roam around to find friend or seek food

•Spinning together

•Feed them

18

ApplicationsMike’s Flying Bike

Flying and Exercise!

Sun SPOT + Google Earth Flight Simulator

19

ApplicationsSPOTkin

Sun SPOT + Pumpkin?

20

My ProjectsGame Panel

Sun SPOT + Never Ball

21

My ProjectsVirtual Earth Controller

Sun SPOT + NASA World Wind

The earth is on your palm

22

My ProjectsGesture Recognition

Facts:1.Multi-attributes; 2. Data stream

Challenges:1.Recognition; 2. Segmentation

Solutions:1.Machine Learning; 2. Threshold+std dev

Accuracy: 17% ~ 97%

23

Simple TutorialGet Data From Sun SPOT

Sun SPOTSun SPOT

Sun SPOTBase StationSun SPOT

Base Station

PC(Processing)

PC(Processing)

24

Simple Tutorial [cont.]

Get Data From Sun SPOT

Sensor Side App:

private IAccelerometer3D accel = EDemoBoard.getInstance().getAccelerometer(); private ITemperatureInput tempSensor = EDemoBoard.getInstance().getADCTemperature(); private ILightSensor lightSensor= EDemoBoard.getInstance().getLightSensor();

String msg = String.valueOf(accel.getAccelX())+";"+ String.valueOf(accel.getAccelY())+";"+String.valueOf(accel.getAccelZ())+";"+ String.valueOf(tempSensor.getCelsius())+";"+ String.valueOf(lightSensor.getValue());

RadiogramConnection conn =(RadiogramConnection)Connector.open("radiogram://0014.4F01.0000.1455:100"); Datagram dg = conn.newDatagram(conn.getMaximumLength());dg.writeUTF(msg); conn.send(dg);conn.close();

9 lines of code!

25

Simple Tutorial [cont.]

Get Data From Sun SPOT

Host Side App:

RadiogramConnection conn = (RadiogramConnection) Connector.open("radiogram://:100"); Datagram dg = conn.newDatagram(conn.getMaximumLength());conn.receive(dg);

String rawData = dg.readUTF();System.out.println(rawData);conn.close();

DONE!

6 lines of code!

26

Conclusion

• Usage– Rapid prototype development– Experiment– Education

• Not ready for commercial deployment– Lacks support– Constraints

• Future development– Get support from sensor providers like J2ME supported by

mobile phone companies– …

Q & A

28

Appreciate

• Dr. Lars Kulik (http://www.csse.unimelb.edu.au/~lars/)

• Dr. Egemen Tanin (http://www.csse.unimelb.edu.au/~egemen/)

• All members in SUM Research Lab (http://www.sumlab.net/)

29

Peng DengResearch Assistant

SUM Research LabCSSE University of Melbourne

Thank you

August 20, 2008