RFID sniffer

RFID sniffer

About this project

RFID is everywhere. Use the easy to build RFID sniffer to find out if objects are tagged.
The RFID sniffer is a simple analog electronic circuit which can detect the presence of 13.56 MHz RFID tags. These tags are commonly used in all kinds of plastic cards like access badges, bank cards, library cards, loyalty cards and so on. Also many other objects may carry RFID tags without you knowing it. Books, toys, and even clothing might be tagged. Carrying tagged objects with you can reveal your identity or whereabouts to anyone equipped with the appropiate tools to read RFID tags.
The RFID sniffer helps you identify which objects are tagged, and which are not.

RFIDuino is here!

RFIDuinoPosted by marc 2009-03-31 21:44
This morning I received my first batch of RFIDuino circuit boards. I quickly assembled one to see if my zero-defect design philosophy still holds... and yes, it did!


Even without tweaking the component values, I got clear readings from several types of Mifare tags I have lying around (1K, 4K and UltraLight). Shown here is a Arduino Diecimila next to my RFIDuino, and a ikTag, which is a Mifare 1K RFID tag.
The RFIDuino plugs upside-down onto the Arduino, and has its LEDs mounted through-hole, literally.


In the next few days I will do some more testing and finalize the kit contents. RFIDuino will be in my web shop very soon! I will offer the kit for €45 plus €5 for shipping.
I will also write up some more elaborate code examples, possibly a full-fledged Arduino library, to make life easier for you RFID coders :)

  • Comments(4)

Fill in only if you are not real





The following XHTML tags are allowed: <b>, <br/>, <em>, <i>, <strong>, <u>. CSS styles and Javascript are not permitted.
Posted by tERBO 2009-04-02 18:03

Nice kit!
I'll definitly buy RFIDuino

Posted by Alasdair Allan 2009-04-02 14:51

Looks good, any chance of offering Google Checkout (as well as PayPal) in the shop? Sorry, but on principle there are a whole bunch of us out here that won't touch PayPal with a barge pole...

Posted by marc 2009-04-01 14:39

The schematic you refer to was posted by me on trac.mediamatic.nl/picnic/wiki/RfiDuino during the Picnic'08 conference in Amsterdam.
The production version of RFIDuino which I publish here on this site, uses a similar, but smaller version of the RFID reader module, with a different pinout. It also has a integrated antenna, which the earlier version did not have.
Both use I2C for communication with an Arduino. The Arduino itself uses USB to communicate to a host.

Posted by Kraimer.0 2009-04-01 00:39

Hi ! i have a question, maybe seem stupid, but im a noob in this....this circuit works for read/write RFID cards ? ...Or at least read?

the scheme that you post, "rfiduino.pdf" is almost the same right ? difference are that this is USB and the other Serial232

tell me if im wrong :P

thank you so much...and keep up the good work !! great blog