PDA Based Kiosk System

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Bluetooh Based PIKS
Yahav Bar yosef Tsachi Nissim Supervisor Gil
Zusman
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Project Objectives

• First semester
• Design and Implement a Bluetooth based Personal
  Information Kiosk System
• Build a Client(PDA) / Server( AP connected to a
  PC) application to demonstrate the PIKS service
• Second semester objectives are
• Implement a PIKS using the Bluez stack on a PC
  (with Eriksson's devices) and the iPaqs
• The client will be written in Visual Embedded
• Linux based server will use the Bluez stack to
  discover clients and communicate.
• Implement a PIKS based on wireless LAN
• Use the wireless LAN cards available
• Windows based server
• Implement the principle of service proposal

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Motivation

• Many situations require quick and personal
  oriented information without standing in lines or
  seeking information boards
• Examples for the above are malls, universities,
  air-ports, and large organizations
• A possible solution is the PIKS

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What is PIKS?

• Personal Information Kiosk System
  
• The goal is to provide a wide range of
  information to people mobile within a designated
  area
• Based on the availability of cheap, reliable, and
  simple to operate PDAs
• Designed as a Client/Server application a
  central server provides information to a large
  number of simple clients
• A customer arriving at the PIKS area connects to
  the server quickly regardless for his position
  and gets the required information

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Server
LAN
LAN
AP
AP
AP
Bluetooth
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Model requirements

• A transparent network for any user No log in
  required or a special adaptation for the PDA.
• Cost, physical size, low energy consumption and
  low computation power.
• Short response period- About one second magnitude.

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The iPaq3870 devices

• The iPaq device is a PDA unit with an integrated
  B.T. chip for wireless communication
• The devices OS is called Pocket PC 2002
• Which is a friendly OS similar to windows
• The device has a color touch screen, with low
  energy consumption and is capable of running
  several B.T. services

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iPaq characteristics

• Pocket PC OS
• Development environment Visual embedded 3.0,
  with MS SDK
• TCP/IP over Bluetooth unsupported in current
  SDK (Bluetooth.h not included) future SDK will
• Bluetooth chip by CSR
• Cambridge, UK - 27 February, 2002 - CSR
  (Cambridge Silicon Radio) announced today that
  its BlueCore01 is providing the Bluetooth link
  in Compaq's latest iPAQ Pocket PC model H3870.
  With its small footprint, CSR's BlueCore has
  enabled Compaq to retain its signature streamline
  design for extreme portability, whilst permitting
  easy wireless connection to other devices with
  integrated Bluetooth capabilities such as mobile
  phones, printers, PCs and other PDAs.

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iPaq Bluetooth capabilities

• Bluetooth Manager
• SDP procedure
• Services offered by iPaq (file transfer, business
  card, bond )
• Virtual Serial COM Port

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Difficulties

• Porting Java coded client to C required by
  visual embedded.
• SDP incompatibility between iPaq (CSR chip) and
  Ericsson.
• New technology frequent updates.
• (embedded 4 supports sockets/Bluetooth but no
  SDK for PocketPC yet)

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Sample Application TTY
WinMain
Init Screen Port Initialize
Port Initialize
CreateFile //open com port CreateThread // create
the read thread Set the port features
Read Thread
Port Write
Loop ReadFile() Show on Screen
WriteFile // get one //byte and write to port
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Sample Application cont

• Connection specifications
• Range reliable connectivity (no cutoffs) at
  100m, tested inside a building.
• Functioning in two direction
• Low power consumption
• Hours of BT usage until recharge
• Data transfer reliability
• No errors were found

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Comparison between the 802.11 and BT technology

• Cost as the economic situation appears to be,
  products integrated with Bluetooth chips are
  still expensive (BT is still developing) while
  other products based on different tech. (802.11)
  are already commercial and relatively not
  expensive (prices are declining as the number
  manufacturers/users increases ) This implies
  that the chances that a Bluetooth based PIKS will
  be implemented as a commercial product are low.

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Comparison between the 802.11 and BT technology

• Roaming Still not as at the 802.11 WLAN
  roaming as a result of the long period of time
  logging in and out .
• A low cost module based on BlueCore2-External
• giving 4dBm output power and -83dBm input
• sensitivity giving excellent real world
  performance.
• The design can be easily embedded into PDAs as
• an add in module or the design taken and
  integrated
• on to the main board. (CSR device spec)

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Future goals

• Find a way to overcome the SDP problem between
  iPaq and Ericsson devices
• Implement a system based on the principle of
  service proposals without polling mechanisms,
  e.g., a client is provided with the information
  automatically when passing near a PIKS AP.
• Implement a system based on wireless LAN and
  compare it with the one implemented with
  Bluetooth.

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Time schedule

• 15.12 Mid semester presentation
• The following two weeks (first two weeks)
• Installing BlueZ on a Linux OS station
• Getting familiar with the BlueZ stack
• First connection attempts
• Weeks 3-4
• Building a Linux based server
• Establish a Bluetooth network
• Determine whether or not to continue with BT
  technology
• Week 5 -8
• Going on with the chosen technology ( maybe build
  a windows based server)
• Building the client application
• Weeks 9 end
• Experimenting the network
• Conclusions and final report
• Final presentation