Connected the SiRF III EM-408 GPS module to a thin PCB and an iPhone connector. The RX and TX lines of the GPS module are connected to the corresponding signals of the iPod connector to allow communication between the two devices and power is taken from the iPhone connector. This could be used with a custom application on the iPod Touch or the iPhone (without on-board GPS) to receive location information.



This is not a plug-and-play GPS solution for the iPhone. A custom application which communicates with the GPS module through the hardware interface must be used to receive location information.

This serial modem brought to you by Switch Science allows you to interface an Arduino board with your iPhone or Android smart phone through the audio jack. Now you can integrate your smart phone into your next embedded project. Some software is required on the phone side, and of course there is an Arduino library.




Because the modem and supporting software exploits a connection originally intended for audio, some corruption of the serial data is to be expected from time to time. It's recommended that you keep this in mind when writing your code. See the links below for more information on the board, the Arduino library, and how to implement it.
A standard 3.5mm stereo headphone cable will not work correctly with this board. You must use the special 4-pole cable such as you would find on a wired headset. The audio jack shown does come with the board, but is not soldered to the board.
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Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.