WISENET Wireless Sensor Network

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WISENETWireless Sensor Network

• Project Team
• 123seminarsonly.bravehost.com
• Advisors
• Sreedhar Ram

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Overview

• Introduction
• Design Goals
• Design Methodology
• Subsystems
• Project Success
• Future Extensions / Projects
• Applications
• Conclusion

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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.

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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

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Design Methodology

• Top-Down Design Process
• Define major subsystems
• Define subsystem interfaces
• Primary Subsystems
• Client
• Standard Web browser via Internet
• Server
• Wireless mote network

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System Block Diagram
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Subsystem Server
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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

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Web Program

• 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

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Web Program
Data Retrieval Form
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Web Program
Generated Graphs
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System Block Diagram
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Subsystem Sensor Network
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Block Diagram Mote
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Picture Mote
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Picture Mote
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Picture Mote
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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

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TinyOS
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Project Success

• 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

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Future Projects / Extensions

• 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

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Potential Applications

• 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

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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.

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Questions?