At long last I managed to get my first Ruby On Rails application displaying something :

using the "acts_as_dashboard" gem I managed to pull data from some of the Jeeduino/Arduino sensors dotted around the house, and using various AJAX calls I can get the screen to dynamically update these values.

I know - this is not terribly advanced, but at least it is a start.

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I've created a page for sample code for accessing data from the Wattson energy meter.

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Electricity usage as recorded by the Wattson

(Click for larger image)

and as recorded and graphed on pachube for a period of a month

This is our house electricity usage - read in realtime by Ruby software running on a Mac Mini (home grown software as such) through the Wattsons USB port.
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Our home monitoring system is coming along with the addition of a set of jeenodes (see them as wireless and battery driven Arduinos)

The slave nodes look like this :

the green box houses the 3 AA batteries making this a truly wireless solution, enabling me to move this around to anywhere in the house.

At the server things look like this

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