Proxmark3 community

Dongkingkong

Member

Registered: 2013-08-23

Posts: 2

14a anti collision - won't read with >1 cards in the field

I recently bought a pm3 and everything has worked fine so far, except 14a reader and hf 14b snoop which always ends up with the messege "blew circular buffer", but seems like a universal problem according to previous posts on it.

The problem with hf 14a reader command is this: My readings on the wiki suggest that pm3 is capable of reading UIDs of several tags in vincinity and somehow select 1 of them to communicate with. However, when I place >1 cards in the antenna's field and run this command, it simply prints "card select failed". Similarly, hf 14a cuids command won't work and prints the same messege.

Anybody having a similar problem? or is pm3 only capable of reading only one iso-14443a card at once?

Dongkingkong

Member

Registered: 2013-08-23

Posts: 2

Re: 14a anti collision - won't read with >1 cards in the field

P.S. As a side note, I flashed and connected to pm3 using binary files from the most recently uploaded pm3-bin-756(cdc+lua).rar .

piwi

Contributor

Registered: 2013-06-04

Posts: 704

Re: 14a anti collision - won't read with >1 cards in the field

The anticollision loop wasn't there until recently, although the comment to iso14443a_select_card() in iso14443a.c stated the contrary.

See http://www.proxmark.org/forum/viewtopic.php?id=1797