Bluetooth POP3 Relay Project Benjamin Kennedy April 30 th, 2002

Outline Goals of the project Possible hardware approaches Possible software approaches Methodology Results

Goals of the Project Create a working Bluetooth application Participate in an educational engineering design problem

Bluetooth Short range wireless technology Data rate of 1Mbps Designed for mass market portable devices –Low Power –Low Cost

Bluetooth, cont. Made up of: –Master –Slave A master can have multiple slaves

Bluetooth, cont. A device can take on multiple roles

Possible Hardware Approaches Personal Digital Assistant (PDA) –Palm OS –Microsoft Pocket PC Mobile Phone –Ericsson –Nokia PC –Microsoft Windows –Linux –Macintosh OSX

Chosen Hardware Approach PC was used –Connection USB Port –Operating System Windows 2000 –Development Program DevStudio

Possible Software Approaches Internet Relay –Web browser –Telnet Specific Data Transfer – FTP –Synchronization Voice over Bluetooth –Headsets

Chosen Software Approach Internet Relay –Mail reader

Hardware Design Used “off the shelf” components

Software Design Mail server connection PC to PC communication Wireless client user interface

Mail Server Connection Post Office Protocol, or POP Can test by typing in: –telnet pop.eecs.tufts.edu 110

Mail Server Connection, cont. Developed a class to –Open a connection and send login information –Get the number and size of messages –Read a specific message

PC to Bluetooth communication API takes care of most parts –Call API function to send data –API causes a Windows event to recognize that it received data Wrote functions to receive and process data

PC to PC Communication Developed a protocol for communication between the PC’s One computer sends data/request, other responds with data or acknowledgement

PC to PC Communication, cont. Example of a message request Wireless Client Internet Relay

Client User Interface

Problems Encountered Bluetooth devices were unreliable –Lost communication with each other –Powered down automatically API was poorly documented –Could not get deep into inner workings Yahoo! shut down POP services –Need to find new POP provider

Conclusions Project was successful –Built application that utilized Bluetooth –Developed message passing and handshaking protocol –Implemented current Internet Protocol