Ask Garmin Blog Feed

Device Interface SDK

For advanced users desiring to develop their own custom software applications for communicating with Garmin® GPS products, this document describes the communication protocols required for transferring data including waypoints, routes, and track logs to and from Garmin GPS products via RS-232 or USB.

Download the Garmin Device Interface SDK
(Revision C last updated May 19, 2006)

Download the Garmin Proprietary Sentences Specification
(Provides information to NMEA users for application of the Garmin Proprietary NMEA Sentences)