I’ve ported the python library over to ruby, and used it in a small project to collect, graph, and publish the data. It’s on github, if anyone is interested.
Tweet-a-Watt is a DIY wireless power monitoring system. The project uses an ‘off the shelf’ power monitor called the Kill-a-Watt and adds wireless reporting. Each plug transmits the power usage at that outlet to a central computer receiver. The receiver can then log, graph and report the data. This pack contains nearly everything* necessary to build a single outlet monitor and receiver. To monitor additional outlets, you will need an add-on transmitter pack. One outlet can monitor up to 1500 Watts.
The starter pack contains:
- 2 XBee modules (one for receiver, one for transmitter)
- 2 XBee adapter kits (ditto)
- 1 USB FTDI cable (for updating, configuring and receiving data from XBee)
- 1 bag of parts including 10,000uF capacitor, 220uF capacitor, 2 1% 10K resistors, 2 1% 4.7K resistors, 5mm green LED, 6″ rainbow ribbon cable, and 2 pieces of 1/8″ and 1/16″ heatshrink
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