1. Department of Computer Science NetBEAMS A System Overview Bill Huynh, Brian Zambrano bill_huynh@sbcglobal.netbill_huynh@sbcglobal.net, bzambran@sfsu.edubzambran@sfsu.edu Computer Science Department San Francisco State University DP: be sure to give proper credit to all Dragutin’s comments labeled DP 09/21/05

2. Department of Computer Science Outline Introduction –What this project is about –Life before NetBEAMS Components –What NetBEAMS is comprised of Examples –What NetBEAMS is providing right now Future –Where is NetBEAMS headed

3. Department of Computer Science About this Project SFSU’s Romberg Tiburon Center uses sensors to measure various sea water variablesRomberg Tiburon Center This project’s aims are to distribute these measurements in real-time to any internet connected user

4. Department of Computer Science Seabird Sensor Mfg: Seabird ElectronicsSeabird Electronics Directly measures –Temperature –Pressure –Conductivity –Photosynthetically available radiation –Transmittance Internally Calculates –Salinity –Others depending on device configuration

5. Department of Computer Science Before NetBEAMS Sensors took measurements and stored data in internal memory Data needed to be manually downloaded and analyzed Issues with this method –Slow –Not real time –Not easily shared –Not really persistent

6. Department of Computer Science The NetBEAMS Solution

7. Department of Computer Science DP: Throw a slide with page from our WWW site showing map wit sensor data expanded

8. Department of Computer Science JDDAC Data acquisition framework from Agilent Technologies Benefits –Easily describes data (meta-data) –Provides transport mechanism (HTTP) –Very low latency from measurement to dissemination –Runs on J2EE, J2SE* and J2ME –Build scripts determine J2SE or J2ME NetBEAMS is ultimately a J2ME application *Note - Nice to have J2SE for debugging! DP: Define acronyms List functions it has and what kind of SW architecture and APIs

9. Department of Computer Science Phone/Controller Motorola i730 cellular phone with Nextel service running J2ME Communication is via RS- 232 Benefits –Existing reliable network –Relatively easy to program using JDDAC –Built-in GPS Currently investigating other platforms

10. Department of Computer Science Measurement Cycle 1.Wake up 2.Take sample 3.Go to sleep Every six minutes 6.Send measurements 4.Parse measurement string 5.Update variables JDDAC Server Sensor RS-232

11. Department of Computer Science Data Dissemination via NRSS NRSS – Numeric RSS NRSS is a superset of RSS Adds metadata and numeric data to fully describe measurements water temperature Seabird +35 246 celsius Sea-Bird Electronics Float64 BZ1tl51234GL3vZrrR4/Og:2 Sea water temperature

12. Department of Computer Science NetBEAMS.org Design DP I would do this earlier then explain components

13. Department of Computer Science NetBEAMS.org DP: As is aid Before, I would show these few slides from WWW site earlier

14. Department of Computer Science Browsing Available Sensors

15. Department of Computer Science Sensor Detail Available channels: Water temperature, pressure, salinity, etc. Hourly/daily/weekly plots for each channel Updated dynamically as new data arrives

16. Department of Computer Science Up and Running at RTC

17. Department of Computer Science Data Example

18. Department of Computer Science Flexibility of JDDAC Our phone in Tiburon was running out of memory due to echos to stdout Solution: Turn it off remotely using JDDAC!

19. Department of Computer Science DP: Maybe also cover -Smart caching we use for retrieval of data (I think we do) -Use of latest WWW stuff like Google maps -A bit more on WWW Architecture -Where is JXTA and ability to federate sensors -Applied several rounds of usability reviews for UI design

20. Department of Computer Science Future Dynamically supply GPS Bluetooth multiplexer to control multiple sensors with one phone Support remote interaction with the CTD (terminal commands) Better error recovery to fill in data gaps Look at alternate hardware platforms for the controller DP: Cell phone interface?

21. Department of Computer Science Links and Resources NetBEAMS - http://www.netbeams.orghttp://www.netbeams.org JDDAC - https://jddac.dev.java.net/https://jddac.dev.java.net/ Romberg Tiburon Center - http://rtc.sfsu.edu/ http://rtc.sfsu.edu/ SFSU Computer Science – http://cs.sfsu.edu http://cs.sfsu.edu