I have several objects in my pockets that do stuff when I put them near things:
- A token to disable a house alarm
- A Transport for London Oyster Card
- A security pass
And in the not-too-distant-future, I wouldn't be surprised if my phone used NFC to, for example, pay for stuff.
What kind of hardware do I need to figure out what "protocol" these objects use to communicate? Is there any (affordable) hardware to read from a wide variety of RFID/NFC? The Oyster Card uses Mifare, I think, but I only know that because of a little reading around the web.
I know nearly nothing about wireless communications, so apologies if I'm using the wrong terminology.