[Noisebridge-discuss] Who will fix the noisebridge RFID reader?

Jonathan Lassoff jof at thejof.com
Tue Jun 4 16:03:18 UTC 2013


I think that without digging into the software of the reader, or
reverse engineering software that can read from it, we'll be spinning
our wheels for a while.

How much is our time worth? Do we already have an investment in 900 Mhz cards?

It makes me wonder if it would be worth just building or buying an
OpenPCD2: http://www.openpcd.org/OpenPCD_Webshop
They're sold out until August for prebuilt boards, but are only ~62€
with shipping.
Downside is that these are for 13.56 Mhz tags.
Upside: very hacker friendly, and they have some cool active tags and
beacons hardware.

--j

On Tue, Jun 4, 2013 at 2:36 AM, Jake <jake at spaz.org> wrote:
> I think now is a great time to finish the project of installing RFID tags at
> noisebridge.
>
> https://noisebridge.net/wiki/Rfid
>
> This RFID reader is installed near the entry door of Noisebridge (at the top
> of the stairs).  If it can be made to work properly, we can put RFID tags in
> any items we want (private or public) and program our computer systems to
> react if and when those items go near or through the door (or elevator
> room).  This could be useful in deterring or preventing theft, so that
> Noisebridge CAN Have Nice Things.
>
> the RFID tags themselves are 7.4 cents each and have a 32-bit unique serial
> number, and user-settable other data.
>
> We just need to get the reader to TELL US the fucking serial number of the
> tags instead of reporting the same string of data for every tag it detects.
> The rest will be easy and fun.
>
> I am hoping that in this Noisebridge Rebase we will fix one of the biggest
> problems with Noisebridge right now - lack of decent tool inventory.  The
> only way we can expect this to stay that way for long will be to tag tools
> with RFID tags, so that if someone tries to exit Noisebridge with something,
> everyone in the space is immediately alerted to the fact and the items can
> be recovered, and the attemped theif deleted.
>
> We Can Have Nice Things.  but we need to work for them, by getting this RFID
> reader to work properly.
>
> Brandon started the project awhile ago, by reading the CHUMP manual and
> writing some C code.  It should be done in Python.  Basically, read the
> serial port (on minotaur) and ignore when it repeats itself.  Send CHUMP
> commands and see if you can get it to tell you the serial number of the RFID
> tag that's taped to it.
>
> If you look at the serial port now you will just see the same line repeating
> over and over.  It does not contain the data we're looking for. If i take a
> different tag over there (instead of the one that's there) it says the same
> thing.  Not very useful.  We need to know WHAT is passing through the door
> in order to know what to do about it.
>
> -jake
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