[757labs] People who are interested in joining

[Jerry Winchel]

I'm custom building wifi enabled RFID door locks for my shop right now.  The cost for the lock itself is a bit over $100.  The cards are $1 each at Parallax and I'm certain they can be found much cheaper.

Im using:

Serial RFID Reader from Parallax: $40
Arduino Uno - $30 (going to replace with Teensy for deployment)
Roving Networks WiFi (XBee socket) - $45
Mortise type Electric AC/DC Door Strike from Smarthome - < $20
Magnetic Door Sensor from smart home $1.50 
Other misc parts to be scavenged.  (power, relay or mosfet, enclosure, etc)

They sell a reader/writer at Parallax that uses different cards, and LadyAda is selling a NFC reader in the same price range.  I plan on having the locks report to and take instructions from an internal web server.

Let me know if anyone want's to colab on the code or design.

Jerry

On Sep 21, 2011, at 9:21 AM, Steve Nelson wrote:

> I think the real downside to that is those doorknobs with the push keys on them are generally 4 digit codes. If there was only one code that's a 1 in 10000 chance of guessing it. If there are 2 codes that's 1 in 5000 changes. We'll easily be 50 members by the end of the year that's down to 1 in 200 chances. That doesn't seem like very good security for a group that has bona fide security consultants in the mix.
> 
> Plus... once we have cards, someone is going to figure out how to print cool pictures on the cards. You know Leroy is going to engrave a dragon or something crazy with the laser. Who wouldn't want to see that?
> 
> What is the benefit of prox cards versus magnetic stripe cards? Seems the prox cards would be dramatically more expensive.
> 
> Steve
> 
> On Wed, Sep 21, 2011 at 9:03 AM, Jason <757labs at lakedaemon.net> wrote:
> Ethan,
> 
> On Wed, Sep 21, 2011 at 12:36:11AM -0400, telmnstr at 757.org wrote:
> >   It's been a desire to move to an electronic access control system
> > for a while (cute proxcards.) It's my desire to get this system in
> > place and move to prox cards versus getting more of the conventional
> > keys cut. I want to move totally to prox cards and am hoping to get
> > this done very soon. Once this is running everyone will cut over to
> > it.
> 
> What about electronic combo where everyone has a unique combo?  Another
> group I'm involved in that has a cabin in Western PA switched to it this
> winter and it's been a huge success.  Combos can be revoked, issued as
> needed, logged, restricted to certain dates/times, etc.  And, there's no
> keycards to manage.
> 
> hth,
> 
> Jason.
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