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RFID anticollision algorithm — Parallax Forums

RFID anticollision algorithm

Pola de MelloPola de Mello Posts: 2
edited 2011-01-09 14:13 in General Discussion
Hi, I am looking for some expertise about RFID readers that allow multi- tag detection.

Right now I have build a system that uses two Parallax readers working in sequence that with a slight delay detect two tags, however I need more fluent system. I have read that there is something called an anticollision function. Is it some sort of clever algorithm that can be applied to any reader? Or is there some difference in the way the component is built?

Does anyone know about this sort of readers/code? where could I get them?

Thanks

Comments

  • FranklinFranklin Posts: 4,747
    edited 2011-01-09 13:59
    http://tifac.velammal.org/CoMPC/articles/24.pdf there are more if you Google RFID anticollision algorithm.
  • Pola de MelloPola de Mello Posts: 2
    edited 2011-01-09 14:06
    Thanks, I had a look through papers and articles that I could find at google and yes, they do describe the details of the algorithm.

    So does it mean I could potentially program every reader with this algorithm and get it to read multiple tags?
  • FranklinFranklin Posts: 4,747
    edited 2011-01-09 14:13
    Depending on the processor involved it might be possible. The Parallax reader has a microprocessor on board that reads and sends the tag ID to your other device so you would have to change that and I don't think that would be easy. You might try looking at DIY RFID readers that use a chip that does the radio stuff and modify that. Atmel makes RFID chips as do others.
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