How to Connect eTrex to a PC

Written by james clark
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How to Connect eTrex to a PC
A 9-pin serial connector (serial connector image by Victor B from

The eTrex is a now-discontinued handheld global positioning system (GPS) device. A portable GPS such as the eTrex is favoured by hikers, boaters and outdoor enthusiasts as a navigational aid. One feature of the eTrex is the ability to hook up the unit to a personal computer for downloading map images and coordinates. The eTrex is equipped with a computer serial port for this connection. Since most modern computers no longer come with a serial port, you'll probably need a serial to USB adaptor cable. These plug-and-play cables require no special drivers or software.

Skill level:

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Things you need

  • Serial to USB cable

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  1. 1

    Press "PWR" on the left edge of the eTrex to turn off the unit.

  2. 2

    Turn over the unit to face the back of the eTrex and lift the flap along the top edge to expose the data port.

  3. 3

    Connect the serial plug on one end of the adaptor cable to the data port on the eTrex.

  4. 4

    Insert the USB plug on the other end of the adaptor cable into any free USB port on your PC.

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