As part of my home monitoring system I needed a display that I can use at different places in the house, preferably without a full computer attached.

And ideally I should not need Ethernet cables run around the whole house, so I decided to use a Jeenode to supply the intelligence, with a LCD display attached using one of the Jeenode LCD-adapters.

So I knocked up some code on one of my Jeenodes to do the display part, and some code (in Ruby) on one of the Mac's - and this is the end result :

(Click for larger)
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Technorati Tags: Arduino Array electronics Jeenode this server

Getting a LCD display working with a Jeenode is easiest done using a LCD plug - but it took me much longer to get it working than I had expected.

And it all turned out to be a stupid mistake on my side :

If you can see the small potentiometer (on the top right hand side of the main chip) - it's really difficult to turn, and it controls the contrast. It turned out that it had not moved when I put a screwdriver in and turned it...

At the start I did not solder the correct 3 bridges on the card either....so lessons learnt and so on.

Technorati Tags: Arduino Array development electronics Jeenode

This is a particularily interesting lightsensor - as is reacts to the same range of light as the human eye - and additionally uses a I2C bus that makes interfacing it to a Arduino or a Jeeduino. Indeed the Jeeduino is getting a "shield" that works with this sensor:
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Out of sheer curiosity I decided to measure the temperature and humidity levels in the air being expelled from our tumbledryer.

So this little one was born :

(Click for larger)

I's a Jeeduino mounted on top of a batterypack (with 3 * AA batteries) and a SHT11 sensor on a set of wires to allow me to insert it into the exhaust tube. In the end I decided to put the whole assembly inside the tube, where it wirelessly sends its measurements into the rest of the house automation system

Technorati Tags: Arduino Array electronics Jeenode

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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