Occupancy Sensor: Difference between revisions
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== HacDC Lab Occupancy Sensor == | == HacDC Lab Occupancy Sensor == | ||
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# The underlying architecture demonstrates an approach allowing bidirectional communications between many microcontrollers and many application | # The underlying architecture demonstrates an approach allowing bidirectional communications between many microcontrollers and many application | ||
# The Google Calendar "hacdcdoorman@gmail.com" is updated every five minutes with current occupancy data | # The Google Calendar "hacdcdoorman@gmail.com" is updated every five minutes with current occupancy data | ||
== Technical Overview == | == Technical Overview == | ||
Revision as of 13:22, 21 November 2008
HacDC Lab Occupancy Sensor
HacDC's lab occupancy sensor is now operational.
Key features include:
- Real-time and historical occupancy data is available for your projects. Perhaps a twitter bot, data visualization heat map or remote occupancy indicator?
- The underlying architecture demonstrates an approach allowing bidirectional communications between many microcontrollers and many application
- The Google Calendar "hacdcdoorman@gmail.com" is updated every five minutes with current occupancy data
Technical Overview
Martin configured a sensor system consisting of an Arduino, a Radioshack photoresistor (276-1657) and a Quest passive infrared motion detector as shown in the following schematic diagram.
This Arduino is connected to the jukebox computer via USB and monitored by a simple Python script that forwards occupancy sensor data to a Spread messaging system (see spread.org). Several "agent" applications receive occupancy status messages via Spread and perform tasks such as updating a Google Calendar and data logging.
All software developed as part of this project is GPLed and available via LaunchPad at: https://launchpad.net/hacdcoccupancy
A demonstration agent is also included in the distribution, providing a convenient starting point for your projects. This demo agent currently toggles LEDs in my house based on HacDC lab occupancy status.
HacDC Doorman Google Calendar
<include iframe src="//www.google.com/calendar/embed?mode=WEEK&height=600&wkst=1&bgcolor=%23FFFFFF&src=hacdcdoorman%40gmail.com&color=%23A32929&ctz=America%2FNew_York" style=" border-width:0 " width="800" height="600" frameborder="0" scrolling="no"></iframe>