This page is supposed to help getting fluksoUSB to work.
There are bits and pieces for most of it floating around the net - alas it doesn't seem to work properly yet.
To answer this you should first of all give Flukso itself a look. Flukso is an open source web-based community metering application. It basically consists of two devices combined into one:
The two of them are linked via UART (for Flukso v1 - it's SPI for Flukso v2 which is going to be available any time soon). fluksoUSB ist the ATmega part of Flukso
There is a brilliant description on how to get the hardware to work
The description to fix the sub-1000W-bug can be found here.
* Dominik Keller
* Justin Otherguy
* Stephan Platz
* Tobias Jeske
* Maximilian Eckardt