[hackerspaces] Open Access Control

Koen Martens gmc at sonologic.nl
Sat Jan 22 22:52:58 CET 2011

Hey John,

On Fri, Jan 21, 2011 at 08:18:39PM -0800, john arclight wrote:
> I just wanted to let everyone know that we finished up Open Access Control
> version 2.0. This is an Arduino-based access control for hackerspaces.
> Check out pictures at:
> http://blog.shop.23b.org/2011/01/possibly-largest-arduino-shield-evah.html

Nice, of course I got to play with the real deal recently. Did you manage to
fix the issue where a simple piece of paper made the magnetic lock less 
effective ??

> The Eagle Cad drawings, assembly instructions, code, etc are of course free
> and available at:
> http://code.google.com/p/open-access-control/
> I feel that the hardware is pretty mature and tested.  The code works, but
> could use some help. Especially with implementing more Ethernet-based
> features and keypad/interactive serial admin commands.

I'm going to have a look at your battery-backup mechanism. We recently
completed the first iteration of our own access control mechanism:


Phase 2 will use the sha1 capabilities of the ibuttons we use, instead
of just checking the address of the ibutton against a whitelist.



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