1. WaterWell Online Water Quality Management - CSD Fall 2008 WaterWell Solution Online Water Quality Management http://www.tslab.ssvl.kth.se/csd/projects/0821006

2. WaterWell Online Water Quality Management - CSD Fall 2008 1.1. STATEMENT PROBLE M

3. WaterWell Online Water Quality Management - CSD Fall 2008 Blantyre, Malawi

4. WaterWell Online Water Quality Management - CSD Fall 2008 Technology vs. Problem K.O WSN Sensors Sun SPOTs Solar Panel Automation Accurate Results Wide-Area Power Source

5. WaterWell Online Water Quality Management - CSD Fall 2008 Previous Work

6. WaterWell Online Water Quality Management - CSD Fall 2008 2.2. CONTRIBUT ION UNIQUE

7. WaterWell Online Water Quality Management - CSD Fall 2008 Reading Serial Data

8. WaterWell Online Water Quality Management - CSD Fall 2008 Testing The Connection Two Java Programs (NetBeans) –To read data from sensor through serial port, forward to base station and vice versa –To switch on & off the level converter (Sensor) through H0 pin

9. WaterWell Online Water Quality Management - CSD Fall 2008 Real-Life

10. WaterWell Online Water Quality Management - CSD Fall 2008 Consumption 3.3. POWER

11. WaterWell Online Water Quality Management - CSD Fall 2008 WaterWell System Host Station Send HELLO Synchronization Configuration Gathering data WSN Node Reading data from sensor Sending data to base station

12. WaterWell Online Water Quality Management - CSD Fall 2008 How does it work ?

13. WaterWell Online Water Quality Management - CSD Fall 2008 System Diagrams Sequence DiagramState Transition Diagram

14. WaterWell Online Water Quality Management - CSD Fall 2008 Power Consumption Issues Problems: Sustainability Sensors’ Power Solutions: Solar Panel Wake Up Mechanism Power Adjustment

15. WaterWell Online Water Quality Management - CSD Fall 2008 Wake-Up Mechanism

16. Wake-up Mechanism Sensor

17. WaterWell Online Water Quality Management - CSD Fall 2008 Link Quality Experiment PRR: Packet Received Ratio The real link quality Parameters: LQI: Link Quality Indicator RSSI: Received Signal Strength Indication CORR: Correlation Which one is the best? How many samples?

18. WaterWell Online Water Quality Management - CSD Fall 2008 Experiment Set-up SenderReceiver 1000 packets (1, 40, 80, 120 bytes) -31dBm 100 different distances

19. WaterWell Online Water Quality Management - CSD Fall 2008 LQI Results PRR grows with LQI increases

20. WaterWell Online Water Quality Management - CSD Fall 2008 SAMPLES 15 Samples: tradeoff between network overhead and LQI accuracy

21. WaterWell Online Water Quality Management - CSD Fall 2008 CONCLUSION Use LQI Use min. 15 Samples

22. Power Experiment SenderReceiver 500 packets (containing output power value) -32 to 31 dBm 7 different distances

23. OUTPUT POWER vs LQI LQI 200 -25 dbm -24 dbm

24. POWER ADJUSTMENT Base station helps SunSPOT to adjust output power Speed up negotiation: –Adjust power between 22 power steps –Dichotomy

25. WaterWell Online Water Quality Management - CSD Fall 2008 Aspect 4.4. Business

26. WaterWell Online Water Quality Management - CSD Fall 2008 BUSINESS Assessment Report B

27. WaterWell Online Water Quality Management - CSD Fall 2008 Nästa: Implementation Investigation Marco’s Tasks Design Documents T Solar Panel Business Opportunities Implementation Final Reports Testing

28. WaterWell Online Water Quality Management - CSD Fall 2008 30 Second Summary WSN offers many possibilities Sun SPOT Rocks ! LQI is the best ! Min. 15 Samples Deep Sleep Mode Everything is under control

29. WaterWell Online Water Quality Management - CSD Fall 2008 Wake - Up Mechanism Athanasios Floros Manzoor Bahader Link Quality Experiment Tao Sun Zhichao Cao Design Documents Chen Huang Project Manager & Business Opportunities Gökhan Dogan

30. WaterWell Online Water Quality Management - CSD Fall 2008 WaterWell Solution Questions and Answers