Listener for Messages

Hello everyone,

I'm just starting to do some basic playing around with some microcrontrollers and decided to build an electric door lock with a stepper motor driving a deadbolt.

Here's my setup:

I have an Arduino microcontroller connected (via USB) to a stationary iMac on my desk. I wanted my driver of this setup to be a listener for iMessages from a specific Apple ID with some type of command such as :unlock or :lock or :autolock etc.

So, I need to run a listener for iMessages (growl comes to mind) that can take data from each incoming iMessage on the machine and process it for certain information.

If I can get the data out, I can use a python script to process the data and send the necessary command out to the Arduino over USB.

Any suggestions? There may be an easy AppleScript, I'm just not too familiar with the language and whatnot.

Strivelli