I've for a long time had a speed problem with the data I transmit using Jeenodes - I have not been able to reliably transmit data at above 1200 bits/s.

At long last I sat down to figure it out - and found 2 key problems

- I was opening the port before every line I transmitted - making the Jeeduino reset itself.

- I found out that I had to read a response after every line I transmitted.

Now it does 57.600 with no problems.

Excellent - no on to the next challenge.

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Just built my first Jeenode Relay plug

and rewrote my rewrite of the "rooms" sketch to add control of both relays from a computer.

I just used this to turn on and off a RGB LED strip I'm going to use for a light inside a set of cabinets. It works.

Next step is now to build 2 MOSFET plugs to let me control light levels and colours.

It's all starting to come together.

Technorati Tags: Array electronics Jeenode Open source Ruby this server

I've given in - and from now on I'll use a MySQL database to continuously store all the readings from the various ROOMS sensors dotted around the house.

The database is very simple :

(Click for larger)

For those who wonder about the first field (id) - it's there to make usage in Ruby on Rails easier for a novice like me.

And to get the data out - here is a simple code example in Ruby

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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 just bought a 5 metre roll of RGB LED's - after reading this Jeelabs article. I even bought the necessary MOSfet transistors to build the driver board.

But then I came across this story - and I happen to have a BlinkM MaxM laying around

Using MaxM with flexible RGB tape
A single BlinkM MaxM can easily drive a 5 meter (16 ft) roll of the flexible RGB SMD LED tape that’s used for architectural lighting. Each roll contains 150 RGB LEDs.

Each LED in the tape is a SMD RGB "5050" LED, capable of putting out about 6000mcd. The spacing between LEDs is 3.3cm (~1.25").
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