#34 RFID Reader/Writer (Mifare MFRC522) with a Logic Level Shifter

Secure access is often controlled with a credit card sized security pass, such as the Mifare RC522 Classic, available for just a few dollars (or pounds).

Here I show you the basics of how to read and write data from and to the RC522 Mifare card (or fob) and discuss what we're going to do about encryption to protect personal data stored on that card.

And if you have an Arduino UNO or other 5v board then you WILL need to use a Logic Level Shifter to convert the 5 volts on the GPIO pins down to 3.3 volts for the RFID read (and back again - bidirectional). Cheap as chips and easy to wire up.

HERE ARE THE LINKS TO MATERIAL MENTIONED OR DEMONSTRATED IN THE VIDEO:

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MiguelBalboa's excellent RFID library:
https://github.com/miguelbalboa/rfid

Look at the numerous examples in that library (which we have explored just a couple of items in the video).

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The MFRC522 data sheet: (covers other hardware too)
http://www.nxp.com/documents/data_sheet/MF1S50YYX_V1.pdf
(Note: this should be V3 and dated 3rd March 2014)

It covers everything you wanted to know (and plenty you probably don't care about) but makes for interesting reading nonetheless.

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A great utility to convert hex to ascii (and back) and to many other formats such as ROT13, Binary, BASE64 etc):
http://www.asciitohex.com/

which we used in the video to convert the hex format personal data on the card to ascii (and back again)
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As always Thanks For Watching and please subscribe if you find these videos useful - new ones weekly (ish).

And my *channel* is here:
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https://www.youtube.com/c/RalphBacon
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How can I remember this? Memory tip: "See" Ralph Bacon, geddit?

Видео #34 RFID Reader/Writer (Mifare MFRC522) with a Logic Level Shifter канала Ralph S Bacon