A Secure Wireless Interface between Personal Digital Assistants (PDAs) Team Dec02-07 Client:Motorola

Team Members:Michael Hale, Polk City, IA David Inman, Tabor, IA Jeremy Kohlhaas, Algona, IA Hassan Rashid, Pakistan Faculty Advisors: Dr. James Davis Faculty Advisors: Dr. James Davis Dr. Douglas Jacobson

Topics to be Discussed  Project background  Technical problems  Hardware design  Software design  Additional considerations  Assumptions  Limitations  Measurable milestones  Testing  Financial budget  Personnel effort budget  Current status

Project Background  2 Personal Digital Assistants (PDAs)  3 Motorola TalkAbout two-way radios  Wireless transfer of information  Security of all transmissions

PDA: Handspring Visor Deluxe Weight: 5.4 oz Weight: 5.4 oz Memory: 8 MB Memory: 8 MB 1 Serial port 1 Serial port 1 Infrared port 1 Infrared port Cradle for attachment to PC Cradle for attachment to PC

Motorola TalkAbout Radios Model T6310 Model T UHF frequencies 14 UHF frequencies Interference/ eavesdropping reduction Interference/ eavesdropping reduction 1 accessory jack 1 accessory jack Signal strength indicator Signal strength indicator

Technical Problems  Hardware design  Software design  Additional considerations  Maximization of data rates  Security

Hardware Design Problem: Design and produce 2 copies of an interface to connect each PDA to a TalkAbout radio Problem: Design and produce 2 copies of an interface to connect each PDA to a TalkAbout radio Keep unit cost below $20 Keep unit cost below $20 Items needed to design this interface: Items needed to design this interface: –Pinout of PDA serial port –TalkAbout radio interface –Circuitry to link the two devices Test models will be hand-built Test models will be hand-built

Pinout of PDA Serial Port

TalkAbout Radio Interface Our group has been unsuccessful in obtaining these specifications from Motorola. Our group has been unsuccessful in obtaining these specifications from Motorola. As a result, we have changed the focus of our hardware design to utilize the accessory port available on each TalkAbout radio. As a result, we have changed the focus of our hardware design to utilize the accessory port available on each TalkAbout radio.

Software Design Software requirements Software requirements –User interface and PalmOS integration –Virtual connection management Programming tool Programming tool –Metrowerks CodeWarrior

Additional Considerations As time permits, the following issues will be added or improved: Maximization of data rates Maximization of data rates Security of information transfer Security of information transfer Cost of hardware production Cost of hardware production

Assumptions Motorola will provide the following Motorola will provide the following –3 TalkAbout radios –Metrowerks CodeWarrior software –Fabrication of custom hardware All other major project expenses will be paid for by ECpE All other major project expenses will be paid for by ECpE Specifications for the PDA’s serial connector and the TalkAbout’s interface will be obtainable Specifications for the PDA’s serial connector and the TalkAbout’s interface will be obtainable

Assumptions (cont.) Only two TalkAbout radios will be involved in a communication session at any given time Only two TalkAbout radios will be involved in a communication session at any given time The maximum cable length between each PDA/TalkAbout setup will not be an issue The maximum cable length between each PDA/TalkAbout setup will not be an issue

Limitations Implementation of the project cannot extend beyond December 2002 Implementation of the project cannot extend beyond December 2002 The TalkAbout radios can only operate up to 2 miles apart from each other The TalkAbout radios can only operate up to 2 miles apart from each other All components must be lightweight All components must be lightweight Interface hardware should not exceed $20 Interface hardware should not exceed $20 The PDA/TalkAbout interface should use available ports or simple connections The PDA/TalkAbout interface should use available ports or simple connections

Measurable Milestones Design Design Hardware fabrication Hardware fabrication Software development Software development Security Security Testing Testing Demonstration Demonstration Documentation Documentation

Testing Unit testing Unit testing –Hardware »Review hardware interface design –Software »Considered successful if a person can operate the user interface to establish a connection and transmit data System testing System testing –Establish connections –Test security –Maximize data throughput

Financial Budget Item Estimated Cost PDAs $200 (qty 2) TalkAbout radios * $150 (qty 3) PalmOS compiler ** $500 Board fabrication * $1000 Poster cost $45 Programming resources $100 Miscellaneous cables, connectors, etc. $150 Total$2145 * Costs covered by Motorola ** Costs covered by Metrowerks

Personnel Effort Budget Specific Task Michael Hale David Inman Jeremy Kohlhaas Hassan Rashid Totals Project planning Hardware design Software development Security testing Totals

Current Status Hardware design Hardware design –Waited a significant amount of time to receive TalkAbout specifications from Motorola –Have recently changed the focus to utilize the TalkAbout’s accessory port instead »This port has a known, standardized interface –Hardware design will begin immediately Software development research is starting Software development research is starting Continual monitoring of completion date Continual monitoring of completion date

Questions ?