sunspotkishan

8/7/2019 sunspotkishan

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Sun SPOT Systems

Presented by

KISHAN C G1GA07CS022


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Session Plan

Introduction Sun SPOT Build and Deploy Flow

The Squawk Java VM

Sun SPOT Device

Working of Sunspot

Sun SPOT Hardware

Applications

Technical Issues

Conclusion

11 APR,2011 206CS86:Technical Seminar onSun SPOT Systems


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Introduction

Sun SPOT (Sun Small Programmable

Object Technology)is a wireless sensor

network (WSN) mote developed by

Sun Microsystems.

A Java Platform for Developing

Applications for Wireless Networks and

Small Devices



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Sun SPOT Build and Deploy Flow


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The Squawk Java VM

Squawk Virtual machine is a small VM written mostly in

java that runs without an operating system on a wireless

sensor platform.

Java ME CLDC 1.1

Features

was designed for memory constrained devices

runs on bare metal on the ARM

represents application as objects(via the Isolated mechanism)

migrates applications from one device to another

runs multiple applications in one VM

authenticates deployed applications on the device


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Program the World


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SunSPOT Device

Basic device has three layers

Battery

Processor Board with Radio

Sensor Board

Processor Board alone acts as

a base-station

User programs the device

entirely in Java using standard

Java tools



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Working of Sun SPOT

Spot - Spot communication: Sender sent radio package & no

acknowledgment from target NoAckException

Host Target communication:

No NoAckException only confirms delivery to the base

stationIf base station fail to deliver package to target

System.out warning



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Sun SPOT Hardware

Processor Board 180 Mhz 32-bit ARM920T core, 512K RAM, 4M Flash

2.4 Ghz 802.15.4 radio with integrated antenna

USB interface

Sensor board

2G/6G 3-axis accelerometer

light and temperature sensors

8 3-color LEDS, 6 analog inputs, and 4 high current

output pins and a ADC.



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Applications

Swarm intelligence

Smart Dust Networks

Robotics

Personal electronics

Rocket Launch Monitor



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Technical Issues Security is a critical issue for many wireless sensor applications,

but implementing effective security mechanisms within tight

resource constraints at an affordable cost can be difficult and

complex.

More powerful processing capability is needed close to the sensor

for signal analysis .

Unique characteristics of these new small devices present

challenges for networking, requiring new ways for devices to

communicate with each other and the Internet. Current standards

dont apply, so new standards are needed which support

communication both between the new devices themselves as well

as between the new devices and devices using todays standards.


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Conclusions

Java technology on wireless sensor networks is here Betterdeveloper experience than the state-of-the-art

Squawk: small Java-based VM

1. Sun SPOT: mid-level sensor device that can be

battery powered

2. Enable exploratory programming

3. Enable more on device computation and reduce

network

traffic

Enable over-the-air programming



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???? Q & A ????



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Thank You


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