The Redpark TTL Cable for iOS is the latest revision of the popular RedPark Serial Cable. The main difference between this and the original is that a RS-232 serial to TTL adapter is no longer required. This means you can connect it directly to an Arduino using only jumper wires. No soldering and no adapters required.
The RedPark cable is the first and only cable approved by Apple to allow hobbyists to connect their iOS devices to external microcontrollers and sensors! With this cable, you can open up your iPhone, iPad, or iPod touch and let your imagination run wild! Use external sensors in your iOS apps! Talk to an Arduino with your iPhone! The possibilities are endless!