The cables we sell, provide a USB Serial connection to and from the GPS unit. It is not possible to access the waypoints, tracks or routes on the GPS directly. You need some software in order to communicate with the GPS unit. Typical software include Anquet, Memory Map or Fugawi. Please note that you will have to purchase them from another supplier. It is possible to download free software such as Gartrip, GPS Babel or GPS Trackmaker.
In order to set up a working connection between your GPS and your computer, you firstly need to install the drivers. These are supplied on a mini CD along with the cable. If you have lost the mini CD, or cannot access it from your computer, and are using a eTrex Cable, this uses PL2303 USB-Serial converters, which can be downloaded from here. For the GPS 12, 38 and 40 cables, they require the CP210x drivers, which are available here. Once you have followed the instructions on the screen.
Once the drivers are installed, please insert the cable into a free USB slot. Once your computer has identified the drivers for the cable, you now need to identify the comm. port number which has been allocated to it. To do this go to The Windows Control panel - Start Menu - Control Panel
Next choose "Hardware and Sound"
Next "Device Manager"
If you expand the "Ports" Section.
You can see in the above screenshot that there is an entry "Prolific USB-Serial Comm Port (COM4)". If you are using the GPS 12,38 and 40 cable, there should be "Silicon Labs CP210x USB to UART (COMX)", such as show below:-
Note that COMX is the comm. port number. Take a note of this as you will need it for the next stage.
Open your GPS software. In this instance we are using Anquet