The Redpark Serial Cable connects iOS devices to RS-232 serial devices. It is designed for use with iPhone 4, iPhone 3GS, iPod touch (fourth generation), iPad 2 and iPad.
The Redpark C2-DB9 cable is usually used with the Redpark Serial Cable SDK. Together these tools enable hobbyist, education and enterprise developers to write iOS apps that communicate with serial devices. These apps may be deployed for private use at home, at school or in an office. Under current Apple policy this cable may not be used with apps sold in the App Store.
This one meter long cable has an iOS connector with a male DB-9 connector on the end, and in the package there is conveniently also an extra female DB-9 connector to solder to your application.
It supports serial communication at speeds up to 57.6 Kbps and requires iOS 4.3.3 or later.
Note: This product communicates at RS-232 voltage levels (±12 V) so you can directly hook up to RS-232 devices such as:
But in order to interface with a TTL (0-5V logic) serial device such as an Arduino/Freeduino, 20x4 LCD, etc, you will need a RS-232 to TTL level shifting circuit much like, if not exactly like, the DCE that we produce :).
For more info and a list of frequently asked questions check out the Redpark website.