1. opensensorAalborg University, Mobile Device Group Anders Grauballe Gian Paolo Perrucci Frank H.P. Fitzek Aalborg University Denmark Introducing Contextual Information to Mobile Phones by External and Embedded Sensors St. Louis, MO – April 21 2008

2. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Denmark?!?!?!

3. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Outline Wireless sensor networks –Convergence of WSN and mobile phones Opensensor platform –Example of applications

4. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Wireless Sensor Networks Wireless sensor networks (WSN) are currently an interesting research area WSN consists out of many, sometime even thousands of sensors Sensor –small electronic system battery driven wireless communication capabilities sensory part (e.g. temperature, light, and many others)

5. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Wireless Sensor Networks Field of application for WSN –Military (main source) –Intelligent households –Environmental scenarios –In-Car communication –Gaming –Health Care –…….

6. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Wireless Sensor Networks Research areas for WSN –Routing –Protocol design –Communication architectures –Energy efficient operations –Security –Information storage

7. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors WSN and mobile phones One problem of WSN is the interface to users –No display battery constraints sometimes it just doesn‘t make sense to have displays.

8. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors WSN and mobile phones Billions of sensors are already out there How do we convey the information to users?

9. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors WSN and mobile phones The convergence of mobile phones and WSN has already started!!! –Integrated sensors –External sensors

10. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Integrated sensors Nokia 5500 3D motion sensor chip embedded –Exercise application (step counter) –Enrich the game experience (turn your phone into a virtual fishing rod)

11. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Integrated sensors New applications for integrated sensors in mobile phones –Derive overall traffic flow for a whole city by partial measurements of some phones (e.g. N95 with GPS)

12. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors External sensors External sensors are available too –not optimized for the communication with the mobile phone –way to expensive –low flexibility

13. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors External sensors: example External sensors –Jogging equipment for iPod from Nike –External sensor placed in the shoe –Step counter conveys information to the iPod No flexibility!!!!

14. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Opensensor

15. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Motivation for the opensensor The main motivation to build the opensensor: –have a wireless sensor board with the following characteristics: Low cost and easy to build/extend Get the basic understanding of DSPs and their programming Build solid teaching material Easy extendible with sensory parts Fully programmable –Test new WSN algorithms directly on board Not just WSN, but convergence with mobile phones

16. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Motivation for the opensensor The opensensor is available for all researcher around the world –Hardware: The plans to build the opensensor are freely available –Software: Basic functionality is offered already and maintain in the future –Teaching: All slides are available, so that it should be easy to integrated it into existing lectures or to build course from scratch

17. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Opensensor interfaces Serial interface –Opensensor debug and test SPI (nRF905) interface Bluetooth interface

18. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Two approaches

19. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Opensensor can enrich the mobile devices with new services: –Sensing the environment around the user Mutual benefit

20. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Wireless sensors have nearly no or limited interface for human interaction Mutual benefit

21. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Mutual benefit Mobile phones can provide: –Human Interface Large and colored display Alarm sounds Text to speech capabilities –Network interface SMS,MMS GPRS, 3G

22. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Temperature monitoring Python implementation Example: – SMS – Warning!!!Temperature 41 C – +1233456789 Application example: Temperature monitoring

23. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Application example: parksensor

24. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Application example: Light sensor Light sensor application –The opensensor measures the light level and sends data back to the phone

25. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors How to get an opensensor Order components from us: –Note, you need to solder the pieces together by yourself!! Documentation available on the web: –How to build it –How to program it –How to test it –Code example Opensensor Mobile phones

26. opensensorAalborg University, Mobile Device Group Introducing Contextual Information to Mobile Phones by External and Embedded Sensors Contacts and acknowledgements Frank H.P. Fitzek Anders Grauballe Gian Paolo Perrucci Ben Kroeger Aalborg University Stephan Rein Technical University of Berlin opensensor@es.aau.dk http://mobiledevices.kom.aau.dk/opensensor/