1. WISENET Wireless Sensor Network
Project Team:
123seminarsonly.bravehost. com
Advisors:
Sreedhar Ram

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. 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

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

6. System Block Diagram

7. Subsystem – Server

8. 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

9. 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

10. Web Program
Data Retrieval Form:

11. Web Program
Generated Graphs:

12. System Block Diagram

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. 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

21. 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

22. 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

23. 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.

24. Questions?