SUN SPOTSAND

MANTIS OS

Sun SPOTs

Squawk JAVA VM

Features of Sun Spot

Mantis OS

Architecture

Features of Mantis OS

Sun Small Programmable Object Technology.

Small and Wireless device developed at Sun labs.

Java platform wireless devices.

Programmed purely in Java.

Device for deploying

Sun SPOTs.

Java VM “Squawk”

eSPOT-rechargeable

Li-Ion battery

Programmed using

native Java tools.

Atmel AT91RM9200 processor.(180 MHz)

512KB RAM/4MB ROM

Chipcon CC2420 802.15.4 radio

3.7V rechargeable Li Battery

power:40-100mA 35x25 mm in size

8-tri colour LED's. 3D accelerometer 5-I/O pins Temperature & Light

sensor. 1 A/D converter. 4 high current O/P

pins.

Open source VM for Java language.

Mainly written in Java.

Interpreter is written in C.

Compact byte code(35-45% of J2ME

Program).

Green threading module.

Easy to program

Powerful and Secure (ECC)

Low power consumption (40-100mA)

Only device to have JVM with garbage

collector

MultimodAl system for NeTworks of In-situ

wireless Sensors

WSN project at the University of Colarado

MOS uses a multithreaded kernel with

priority-based round robin scheduling

Written in standard C Library

Ported across multiple hardware platforms

Portable multi-threaded kernel

Threads share address space

Small memory footprint(<500 bytes of RAM)

Energy-efficient OS(<20 mA)

Supports dynamic reprogramming