EnergyLogger is a simple, native, cross-platform application designed to log real-time energy usage from the “Tweet-A-Watt”, a wirelessly enhanced version of the ubiquitous Kill-A-Watt power meter. The Tweet-A-Watt project was Make Magazine’s winning entry into the 2009 Greener Gadgets Design Competition sponsored by Core77 and the Greener Gadgets conference. The meter can be built very inexpensively, including the cost of the Kill-A-Watt meter itself and the kit needed to turn it into a wireless mesh transmitter. The project was published as “open-source hardware”, and has been built by numerous energy conscious makers around the world.

EnergyLogger is designed to take the place of the Python scripts developed for the original Tweet-A-Watt project. By providing a user-friendly GUI interface for monitoring and logging data from these wireless enabled meters, we hope to remove one of the barriers to entry when implementing this project for yourself.

In addition to tweeting daily usage statistics, EnergyLogger is able to:

1. •Log interval data to a CSV text file
   

2. •Upload interval data using Google’s Data API protocol to a Google Doc spreadsheet for analysis by other Google Apps or for use by Google PowerMeter
   

3. •Monitor energy usage and raise an alarm when load remains outside upper or lower limits for a user specified amount of time
   

4. •and “Tweet” these alarms to a user’s Twitter account.
   

The data files created by EnergyLogger can be imported directly into EnergyProbe, our flagship energy analysis software delivering an inexpensive, powerful, wireless solution to record, understand and interpret energy usage which had previously cost many thousands of dollars.

The 802.15 wireless standard implemented in the XBee radios allows EnergyLogger to monitor multiple Kill-A-Watt meters simultaneously. Data is collected approximately every 2 seconds, processed, logged and uploaded at user defined intervals.

The interface is simple to navigate, provides all the pertinent information at a glance and can be made to disappear into the system tray or menu bar, doing it’s job in the background while your computer is free to do other tasks.

stolen from ladyada.net (with apologies)

EnergyLogger is distributed as shareware. Until it is registered, it will only run for 30 minutes at a time, there are no other limitations. The cost is only $10 USD, and you can purchase an EnergyLogger license here.

EnergyLogger™ for Windows can be downloaded on the Downloads page. EnergyLogger for Mac OS X will be available soon.

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