yan 🐇Apr 6, 2017
random n00by question: say that i have a key card and already determined that it's not NFC. what's the easiest way to figure out what protocol it is using? assuming it is passive RFID, is there a DIY way to read it (like with an SDR)?
Show threadThracky :smiley_cat: SpackoidApr 6, 2017

@bcrypt I've used an arduino and RFID shield for stuff like this in the past. It's a bit dependent on the RFID chip/reader but they all tend to use standard underlying protocols.

It's been a long while since I've mucked with it though so my memory is a bit fuzzy on details at the moment.

Show threadThracky :smiley_cat: Spackoid

@bcrypt Adafruit has a pretty good base for communication using MiFare protocol, which is a (sometimes) ISO 14443 compliant protocol.

Although I imagine since the card isn't responding to NFC commands that it's *not* ISO 14443 compliant. Or there's something else going on. :relaxed:

Apr 6, 2017 at 1:21pmWeb