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 discontinued, replaced by StrongLink SL018

RFIDuinoPosted by marc 2010-04-02 22:54
The ready-made StrongLink SL018 Mifare RFID reader module is a more cost-effective solution. It can be ordered online from StrongLink in Beijing, China, and you will have it in a matter of days.

I wrote a simple Arduino sketch for reading tag IDs. It also works with the smaller sized SL030, which runs at 3.3V. A complete Arduino library for reading and writing data sectors on Mifare cards is also available.

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  • Comments(9)

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Posted by Camila 2013-12-05 14:57

Hi Marc:
I have a Arduino Mega 2560 and a SL018, and I'm trying to compilate the example UID for the library for SL018, but i don't get any reaction from tag, and I connect vcc, gnd, sda, and scl respectively , can you help me to know what it is?

Posted by Vincent 2012-01-23 13:11

Hi Marc,

I want to try to connect multiple RFID readers (SL018's) to 1 arduino one board, but haven't got it working yet. Do you have any suggestions on how to connect and read tags from either of the connected RFID readers?

Posted by Robert 2011-08-23 06:34

What about a solution for 125 and 134.2khz? i.e. iso standards? As used is cat/dog microchips etc..

Posted by SL018 2011-08-04 13:15

Yes, but the shipping is $42 !!! !!! Insane.

Posted by Mo 2011-07-01 01:07

Where did you get your tags from ?

Posted by AndyboyH 2011-02-25 13:27

Was really interested in the SL018, but StrongLink's cheapest shipping was quoted to me at twice the cost of the board itself...

Wonder if there's any good alternatives that don't charge an arm and a leg?

Posted by q 2010-11-19 15:11

Hi, I've just gotten my SL018. I'd like to know what kind of cables you are using in that picture. It looks like a quick and easy way to get things hooked up.

Posted by mtschauer 2010-05-14 03:22

Hi Marc. Thanks for the great posts. I was just wondering which Arduino board you use/would recommend for doing simple rfid stuff. I'm new to Arduino, and I'm a bit overwhelmed/confused by the different board options.


Posted by Tipie 2010-05-11 20:36

I'm trying to read and write StrongLink's RFID, and I'm lucky found this post. I hope you can release a complete Arduino library for read and write. Thanks.