Can I write UID? about rfid

[miguelbalboa]

Hello iVisii, Depending on what RFID card you use, In mostly cards you can't.
You need to read the documentation for your card.
Greetings. :)

[joelluijmes]

Yes I believe that the card supports it. (It is a S50 Card.) But I don't know how with this library, or write at all. I don't understand the write functions since I don't know what that memory blocks are? I think I need to do more research in RFID, do you know any reference how all information is stored etc?
Thank you for replying,
Regards

[ljos]

The UID of the mifare S50 card is in sector 0 block 0 and is read only.

You can read more about the card here.

[joelluijmes]

But how does this work then?
http://youtu.be/sAp8GrgerMA

[ljos]

Either it is a card that is emulating a mifare card or it is a mifare knock-off that is not read-only on S0B0. On the standard mifare S50 the UID is burnt into the card.

[mdxs]

I think this issue can be closed, as it is answered sufficiently with: depends on the RFID card you use.