Connects an iPhone, iPad or iPod touch to navigation devices such as a GPS. This cable works with official iOS apps and you can even write your own official apps to take advantage of this cable and make money doing it, if you so desire.
The GPS Cable provides data to an iOS app using the Core Location API. Since the Core Location API is the standard way that a location aware iOS app obtains positioning data, the cable is expected to work with any location aware iOS app. The cable allows all "location enabled" iOS apps to communicate with an external GPS or another navigation device that might be used in a boat, plane, car or truck. Just plug in your navigation device to the DB-9 connector and power it up with a separate supply and you are on your way.
This 1 meter long cable communicates using the common NMEA 0183 (v3.01) protocol which is used by products such as the GPS Demo board and it comes with an extra DB-9 female connector just in case your application side doesn't have one.
To see if your iOS recognizes the cable just open the "Settings" app on your iOS device. Select "General", then "About". If the GPS Cable is connected properly, it will appear in the list shown.
Unfortunately, iOS does not tell you which GPS it is using, internal or external, but you can use the Redpark GPS Cable App (available in the App Store) to help you determine the difference. The "Data" screen in the GPS Cable App will showing data coming in from the external device. If there is no data in the monitor window, then iOS is still using the internal GPS.
Keep in mind that you can't power/charge your iOS device when providing power to the navigation side of the cable.