RFID Card with UID Rewritable - Revision history

Jingfeng at 15:11, 19 December 2012

2012-12-19T15:11:05Z

Jingfeng at 15:10, 19 December 2012

2012-12-19T15:10:04Z

Jingfeng: Created page with "I have been unsuccessful in writing the UID on this card as advertised, using the nfc-mfsetuid program from libnfc. (this program uses a special "unlock" command, the first st..."

2012-12-19T15:08:48Z

Created page with "I have been unsuccessful in writing the UID on this card as advertised, using the nfc-mfsetuid program from libnfc. (this program uses a special "unlock" command, the first st..."

New page

I have been unsuccessful in writing the UID on this card as advertised, using the nfc-mfsetuid program from libnfc. (this program uses a special "unlock" command, the first step of which is transceiving 7-bits of value 0x40; the card does respond to this, but then does nothing else).

I did not receive any documentation with the card, so I am not sure if a different procedure is needed, or if the card is defective. Please advise.

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-* I have been unsuccessful in writing the UID on this card as advertised, using the nfc-mfsetuid program from libnfc. (this program uses a special "unlock" command, the first step of which is transceiving 7-bits of  value 0x40;  the card does respond to this, but then does nothing else).
+*UID unlock
+**I have been unsuccessful in writing the UID on this card as advertised, using the nfc-mfsetuid program from libnfc. (this program uses a special "unlock" command, the first step of which is transceiving 7-bits of  value 0x40;  the card does respond to this, but then does nothing else).
 I did not receive any documentation with the card, so I am not sure if a different procedure is needed, or if the card is defective.  Please advise.
-** Thank you very much for the quick reply!  I am embarrassed to tell you that my problem was due to an error on my part calculating a CRC.
+**Thank you very much for the quick reply!  I am embarrassed to tell you that my problem was due to an error on my part calculating a CRC.
 I was able to get the reset commands contained in the libnfc source code to work (7-bit 0x40, followed by 8-bit 0x43 for unlock), but I only know these commands from looking at the source code for that project;  if there is any documentation for the card, I would very much appreciate it.

← Older revision		Revision as of 15:10, 19 December 2012
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−	I have been unsuccessful in writing the UID on this card as advertised, using the nfc-mfsetuid program from libnfc. (this program uses a special "unlock" command, the first step of which is transceiving 7-bits of value 0x40; the card does respond to this, but then does nothing else).	+	== FAQ ==
		+
		+
		+	* I have been unsuccessful in writing the UID on this card as advertised, using the nfc-mfsetuid program from libnfc. (this program uses a special "unlock" command, the first step of which is transceiving 7-bits of value 0x40; the card does respond to this, but then does nothing else).

	I did not receive any documentation with the card, so I am not sure if a different procedure is needed, or if the card is defective. Please advise.		I did not receive any documentation with the card, so I am not sure if a different procedure is needed, or if the card is defective. Please advise.
		+	** Thank you very much for the quick reply! I am embarrassed to tell you that my problem was due to an error on my part calculating a CRC.
		+
		+	I was able to get the reset commands contained in the libnfc source code to work (7-bit 0x40, followed by 8-bit 0x43 for unlock), but I only know these commands from looking at the source code for that project; if there is any documentation for the card, I would very much appreciate it.