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  • 1. WISENET Wireless Sensor Network BY G.JANAREDDY 08Q61A0569 IV CSE
  • 2. Overview
    • Introduction
    • Design Goals
    • Design Methodology
    • Subsystems
    • Project Success
    • Future Extensions / Projects
    • Applications
    • Conclusion
  • 3. Introduction
    • Wireless Sensor Networks
      • One of MIT's 10 emerging technologies
      • Low-power systems
      • New applications: sensing, controls, automation
    • WISENET: Wireless Sensor Network
      • Office environment monitoring
        • Temperature, humidity, light
      • Quantitively evaluate heating & A/C systems
      • Funding & support provided by Honeywell, Int'l.
  • 4. HISTORY:
    • The technological drive for smaller devices using
    • less power with greater functionality has created
    • new potential applications in the sensor and data acquisition
    • sectors.
    • MIT even recognized wireless sensor networks and TinyOS
    • as one of the ten emerging technologies that will change
    • the future (Technology Review, 1 February 2003).
    • “ Wireless Sensor Networks for Habitat Monitoring”
  • 5. Design Goals
    • Use of Commercial-Off-The-Shelf (COTS) software & standard interfaces where applicable
      • Apache web-server (HTTP)
      • MySQL database
      • PHP web programming language
    • Simple, web-based user interface
    • Battery-powered, wireless sensor nodes: 'motes'
    • Low-power consumption = Long battery life
    • Motes create self-organizing ('ad-hoc') networks for robust communications
  • 6. Design Methodology
    • Top-Down Design Process:
      • Define major subsystems
      • Define subsystem interfaces
    • Primary Subsystems:
      • Client
        • Standard Web browser via Internet
      • Server
      • Wireless mote network
  • 7. System Block Diagram
  • 8. Subsystem – Server
  • 9. WiseDB
    • Written in C++
      • Utilizes open-source APIs
        • Application Programming Interfaces (API)
        • MySQL++ database API
        • Serial API
    • Relays information from mote network to database
    • Sends commands to mote network
  • 10.
      • Written in PHP4
      • Utilizes Charting Software: ChartDirector v3.0
      • Generates 3 Graphs (default)
      • Passes Parameters via HTTP GET
        • Use bookmarks for specific queries
      • Retrieves Data for Specific Mote or All Motes
    Web Program
  • 11. Data Retrieval Form: Web Program
  • 12. Generated Graphs: Web Program
  • 13. Subsystem – Sensor Network
  • 14. Block Diagram – Mote
  • 15. Picture – Mote
  • 16. Picture – Mote
  • 17. Picture – Mote
  • 18. TinyOS
    • Real-time operating system for microcontrollers
    • Open-source project at UC Berkeley
    • Key Features:
      • Developed for sensing applications
      • Emphasis on low-power: Idle & sleep modes
      • Highly modular architecture
      • Efficient utilization of resources
    • Currently developed for Atmega microcontrollers
  • 19. TinyOS
  • 20.
      • Wisenet is partially operational
        • 2 Motes w/ prototype sensor boards
        • TinyOS modified for CC1010
        • Server running WiseDB + web interface
        • Sensor boards are not currently powered by batteries.
          • Problems with DC-DC converter
      • Unable to test multi-hop routing due to lack of motes
    Project Success
  • 21.
      • Expand network to develop & test multi-hop routing
      • Develop a single-board mote
        • Create a expandable, plug-in sensor interface
      • Research alternative energy sources
        • Solar cell, rechargeable batteries
      • Continue development of TinyOS
        • Improve tools
        • Optimize performance / reduce power usage
      • Improve web interface
        • Data analysis
    Future Projects / Extensions
  • 22.
      • Lab / Office Monitoring
      • Natural Habitat Monitoring
      • Automation / Process Control
        • Where wired sensors are impractical
      • Security Systems
        • Intrusion detection & occupancy sensors
      • Extreme Weather Surveillance
        • Think “Twister”
      • Potential Biomedical Applications
        • Critical fall alert for the elderly
      • Military Reconnaissance
        • Monitor battlefields, sensitive locations
    Potential Applications
  • 23. ADVANTAGES:
    • The following bullet-points show the benefits of using Wisenet
    • against traditional methods.
    • Typically ¾ the cost of a walkthrough.
    • Can monitor offices over 24 hours.
    • Captures true maximum and minimum occupancy figures.
    • Installed at weekends – no staff disruption.
    • Utilization figures viewable the very next day over portal.
  • 24. Conclusion
      • WISENET: Wireless Sensor Network
      • Emerging technology that will change the world
      • Many real-world applications
      • Low-power
      • Open-source software
      • Modular mote application design (TinyOS)
      • Flexible server implementation
      • Simple user interface via the web
    • WISENET is a step to the future of
    • wireless sensing technology.
  • 25. REFERENCES:
    • Atkinson. MySQL++: A C++ API for MySQL, vers 1.7.9 ,
    • online posting . 12 Dec 2002.
    • <http://www.mysql.com/downloads/api-mysql++.html>.
    • 2. Gay, Levis, et al. The nesC Language: A Holistic Approach to
    • Network Embedded Systems ,
    • online posting.
    • To appear in Proceedings of Programming Language Design and
    • Implementation
    • (PLDI <http://today.cs.berkeley.edu/tos/papers/nesc.pdf>.
  • 26. Questions?
  • 27. THANK YOU