RFID + Comet = Browser-based Card Reading Goodness

by Andrew BettsApril 22nd, 2009

I’ve recently come across a brilliant new use of comet in an application designed by Dobrica Pavlinušić, a meteor user. The video says it all, though the music is probably best experienced on mute :-)

Dobrica writes:

I already blogged about RFID readers but now I really need to replace antique 3M software with something better. So, basically, I started with specification:

User should put RFID tag on reader and get output from Koha

Nice and simple. However, readers are connected to Windows machine. And we need some way for reader to push data about new tag to browser. Hmmm… push? Sound like Comet, doesn’t it?

Let’s see what we need:

  1. Comet server to display page in web browser and push updates
  2. RFID reader program installable on Windows to communicate with serial port and push messages to Comet server
  3. User with a browser

I particularly like this because RFID driver software is often appalling, and it’s nice to see some of the principles of building the rich internet applications that we love to use extended to breathe fresh life into the way we interact with embedded systems.

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