Door entry system

https://wiki.london.hackspace.org.uk/w/index.php?title=Door_control_system&redirect=no

https://wiki.nottinghack.org.uk/wiki/Gatekeeper

http://wiki.hacman.org.uk/Door_Control

http://rlab.org.uk/wiki/Project:Door_Entry_System

http://www.buildbrighton.com/wiki/Entry_System

https://wiki.leedshackspace.org.uk/wiki/Marvin_P_Droid

want to build our entry system?