Alright, I'll try and keep this short and sweet. I'm in the process of building a kegbot, and I plan on using an iDevice as the frontend for the user interaction. I also want the iDevice to talk to the Arduino via serial communication. I have spent a considerable amount of time researching the topic, and it seems doable.
So for I have jailbroken the iPhone (5.1.1), installed ssh, terminal, and minicom. I found a good tutorial describing some of the steps here. I then soldered a custom iDevice 30 pin dock connector. Now I am at the point where I want to load a simple sketch on the Arduino, and have it output something simple to see if the iPhone can read the data going across the serial connection using terminal with minicom on the iPhone to read a simple "Hello World" message being broadcasted/transmitted from the Arduino serial TX port. I know a simple sketch would do the trick, I have never written a sketch before so I am little behind the curb on that. Thanks for reading.
cheers - Chris