iOS virtual button to Arduino

Question

What would be the best way of sending a signal from an iPad to an Arduino?

I am trying to use XBee, with iPad and Arduino to send a wireless signal. I want to make a big red virtual button on an iPad that, when pressed, turns on an LED on the Arduino. I am a total newbie when it comes to iOS, but OK with Arduino and XBee.

Answer 1

So I'm not sure if I understood correctly, but in my meaning there is only one simple way to solve the problem:

Connect an XBee to a Computer and another to the Arduino. On the computer you launch a webserver, which will be accesible from the iPad over Safari. This server handles the clickes and writes to the XBee Com Port, for communication.

Here are some examples, people already made:

• http://www.projectallusion.com/1/post/2009/11/iphone-controlled-solar-powered-arduino-tank.html
• http://www.sparkfun.com/tutorials/152 (not with xbee, but you can implement that by yourself)