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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.
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.


<<diagram>>
[[Image:OccupancySensor.png]]


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.
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.

Revision as of 07:14, 21 November 2008


HacDC Lab Occupancy Sensor

HacDC's lab occupancy sensor is now operational.

Key features include:

  1. Real-time and historical occupancy data is available for your projects. Perhaps a twitter bot, data visualization heat map or remote occupancy indicator?
  2. The underlying architecture demonstrates an approach allowing bidirectional communications between many microcontrollers and many application
  3. The Google Calendar "[email protected]" 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.

OccupancySensor.png

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: <tbd>

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>