Gatekeeper

Gatekeeper is the first node of our Hackspace Instrumentation project to go live and is responsible for access control to the space through the front "Airlock" door.

Source Code

https://github.com/NottingHack/Gatekeeper

Schematic

Logic Flow

Quick Breakdown

• Nanode
• RFID reader
• Doorbell button (interrupt pin)
• magnetic release (MOSFET switch 12v)
• Magnetic contact
• Doorbell sounder (Relay)
• Magnetic release status led's red/blue
• Matrix keypad and HD44780 LCD controlled via I2C AtTiny2313
• MQTT
• MQTT scripts on holly push to irc twitter cacti and log
• Card numbers in 'Instrumentation' mySQL on Holly
• Web page to manage mqsl db, intranet only, htacess passwd

Notes

I may swap pin D4 and D9 around, Magnetic Contact and Release. This would put the Mag Release and status LED's all on PORT D pins and allow quick change of all 3 pins with one command --'RepRap' Matt 20:54, 28 May 2011 (BST)