WebTag: Smart Tag with Embedded Web Server

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WebTag: Smart Tag with Embedded Web Server

  1. 1. WebTag: Smart Tag with Embedded Web ServerJuan Jose Echevarría, Jonathan Ruiz-de-Garibay, Juan Ignacio Vazquez Maite Álvarez, Ana Ayerbe
  2. 2. Outline Motivation WebTag Concept Architecture  TCP/IP stack  Compression Security Evaluation Conclusions Future WorkWebTag: Smart Tag with Embedded Web Server
  3. 3. Motivation Use of radiofrequency identification systems in traceability and asset tracking growing every day. Systems are getting expert adding more functionalities. Theuse of sensors provide information about the product conditions.WebTag: Smart Tag with Embedded Web Server
  4. 4. RFID vs NFC Systems are usually based in RFID. RFID provides only one way communication. No interaction is allowed. NFC is bidirectional. Users can send info/data to the tag.WebTag: Smart Tag with Embedded Web Server
  5. 5. WebTag Concept Emulate the evolution of Internet web model in a tag.  Bidirectional communication  NFC. Embedded web server will have a small computational power and limited memory. Complex services that provide advanced features. Allow surfing contents. The objective is to create a new type of smart tag equipped with a set of sensors and a micro-embedded web serverWebTag: Smart Tag with Embedded Web Server
  6. 6. Architecture Same architecture than other smart tagsWebTag: Smart Tag with Embedded Web Server
  7. 7. Present Prototype Ethernet interface MS430 ultralow-power microcontroller (Texas) Set of sensors:  Temperature  Humidity  Luminosity TCP/IPstack RTC (Real Time Clock)WebTag: Smart Tag with Embedded Web Server
  8. 8. TCP/IP Stack Based on Andreas Dannenberg stack:  is an implementation of the TCP/IP protocol stack for small 8-bit or 16-bit microcontrollers.  is open source.  allow only one connection. No UDP.WebTag: Smart Tag with Embedded Web Server
  9. 9. Compression For example  Headers  TCP/IP lenght: 40 bytes  Some fields don’t change during connection  Send only the changesWebTag: Smart Tag with Embedded Web Server
  10. 10. Security Login  3 failed attempts blocks access Basic encryption  XorWebTag: Smart Tag with Embedded Web Server
  11. 11. Evaluation Tests made through the Ethernet interface Header compression: 50% Data compression: over 30% Transfer speed: 15kB second RAM usage: 2kB Small memory for sensors captures  Only values with 5% change are stored for memory usage reductionWebTag: Smart Tag with Embedded Web Server
  12. 12. Conclusions The first state presents good results. Web browser to surf contents. Access control to the tag.WebTag: Smart Tag with Embedded Web Server
  13. 13. Future Work Include NFC capabilities Server improvements Improve compression Power managementWebTag: Smart Tag with Embedded Web Server
  14. 14. Thank you Jonathan Ruiz-de-Garibay Pascual jonathan.garibay@deusto.es MoreLab – Mobility Research Lab http://www.morelab.deusto.esWebTag: Smart Tag with Embedded Web Server

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