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.
Pics
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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
6 Core alarm cable run to airlock door
- magnetic contact on black and white core
- door magnetic release green and yellow cores
- last man switch on blue and red cores