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

Where a Jeelink (a Jeenode with integral fullsize USB plug) provides the central node that receives all the transmissions from the slave nodes.

Each os the slaves have the ability to add sensors for humidity, temperature, light-level and movement sensing. Currently I only use DS18B20's to sense temperature - the rest will be added at a later stage.

At the server

The server is running a set of software modules written in Ruby, with RRD to store and graph the data, and the rather unusual addition of a memcached instance to act as a easily accessible object store so that I can access all the data from any computer in the house, and distribute the software across any number of computers.

The Wattson

The Wattson energy meter is also attached to the same USB hub as the jeelink, and talk to yet another set of ruby modules that graph and communicate with the rest of the house monitoring software.

The weather station

The weather station use LWC running on a computer in our library, and publishes all its data to

- A local webserver (which in turn is used as a source for the home monitoring system - it pulls all its data from the webserver)

- Wunderground weather network

- One of our external webservers - just follow this link.

Output

So far the data is communicated to:

- RRD for longer term storage and graphing

- Twitter ('because I can')

- Pachube for sharing

- And this blog.

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