Question about Garmin eTrex Legend GPS Receiver

1 Answer

PC will not detect Legend GPS

I have a newer PC that does not have a physical serial port. According to Garmin, a serial to USB adapter can be used. I have added one and assigned COM2 using standard serial settings but Web Updater not MAP SOURCE will detect the GPS. I have verified that the COM PORT is working properly and have also verified that GARMIN is selected on the interface screen. Any suggestions?

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: PC will not detect Legend GPS

Change the interface setting to NMEA Out and see if that helps. That is what I did on my Legend, bought in 2003. It still crashes the computer every so often, however, and I haven't figured out why.

Posted on Apr 12, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Where do I find a 6 pin serial to usb adapter for the Garmin 421s? I can't find one anywhere on line. Does Garmin sell one? It's Saturday and Garmin's help center is closed. Their on line...


The 6 pin DIN plug found on the GPSMAP 421s data/power cable (Garmin part number 010-10918-00) is used for the sonar input.

Data transfer from the GPSMAP 421s is easily transferred by memory card.
Information about data transfer on the 421s is at about 50 seconds into this video.

Real time NMEA data can be transferred using Garmin part number 010-10918-00 wired to a DB-9 serial connector (Instructions are on the cable).

It then can be adapted to USB using a serial to USB adapter.

Sep 17, 2011 | Garmin 421S GPS Receiver

1 Answer

Cannopt download maps

Not surprised at that, don't know much about these units but from what i was able to find out they don't use a usb cable to load software they use a serial cable, and computer do not have a detection process for the serial cable, You need the cable as well as the software to load information up to or down from the unit. Quick check brought this to my attention and maybe something in here will help you.

Hope this helps.

Apr 26, 2010 | Garmin eTrex Legend GPS Receiver

1 Answer

I have the garmin extrex legend and need to install the update for the freezing problem. I have the Garmin cable (9 pin to the 4 slide contacts) but, I'am using a dell mini with no 9 pin male...

you can buy a USB to serial adaptor at almost any computer store. it will install and show up as a com port, you can then update that way. i have the same GPS.

Nov 25, 2009 | Garmin eTrex Legend GPS Receiver

1 Answer

I hook up my GPS to the Com Serial Port to download maps from program and the program tells me its not connected. I'm wondering if this is a path problem with the computer to the port? How can I fix it?

What program are you using and what cables are you using? To hook mine up to my non-serial Mac, I had to get an adapter cable which needed drivers. With a PC, you need to make sure you have your settings correct. Often, the manual for the software you're using to download maps will tell you how to set it up correctly.

Oct 20, 2009 | Garmin eTrex Legend GPS Receiver

1 Answer

ETrex legend serial to usb cable problem


Have you tried using the cable with another device just to check it's working ok.. And try a different usb port also, they can be funny that way.
A Garmin rep I spoke to about this told me (off the record) to just go to my local electronics store to pick one up for app €15 as the same thing from Garmin would be about €75. So it's basically the same cable and should work. I tried it with a generic cable here in the shop and it worked in one usb port but not in the other two so a bit of trial and error is needed.
All that failing I'd bring it back to the shop and ask them if there is a different type you could try, possibly you need one with a higher data transfer capability.. But try the cheaper and easier options first..

Oct 07, 2009 | Garmin eTrex Legend GPS Receiver

1 Answer

How do I connect my garmin iii plus to my modern pc for downloads?

Looking for a way to connect a serial device to the USB port on your PC or Mac? Our USB High-Speed Serial Adapter provides a simple and reliable solution. This adapter is broadly recommended by serial device manufacturers due to its dependability and "Best in Class" compatibility.

Mar 22, 2009 | Garmin GPS III Plus GPS Receiver

8 Answers

GPS to software communication issue

look in the options of the software ... choose auto or usb for communication with the garmin

Jan 10, 2009 | GPS Devices

1 Answer

Garmin GPS III Pilot to PC communication problem

If it were doing this just on the Vista machine I would say it was Vista related but since you are getting it from an xp machine as well the problem is either cable or the gps unit. You don;t say if this just started happening or ? If you can try out the cable on something else to make sure so you can eliminate it. About the only thing you can do is to make sure the port settings in the pilot are set correctly. Generally the slower the better if you are having communication problems as this makes the signal timing not as critical. Try 9600 baud to start. Make sure that the data bits are also set roght. This is the 8n1 or 7n1 thing you see. I can;t think of what the default is on the garmin but as long as both pc and garmin have speed, bits, parity, and stop but set the same they should talk.

Try to download from the unit as well as upload.Unfortunetly you can only change the speed and protocal or reset the unit. You won't be able to fix it if is a hardware thing. If you are using a USB to Serial adapter then I would say that is your problem or could be. Cheaper ones just don't work often on higher port speeds. You might want to try the gps on a pc with a actual serial port if you are using one. If it works then you should try a different brand of adapter or really slow down the speeds.

This won;t solve it unless you luck out but it should let you know where the problem is.


Jul 10, 2008 | Garmin GPS III

Not finding what you are looking for?
Garmin eTrex Legend GPS Receiver Logo

Related Topics:

170 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garmin GPS Devices Experts

Tom Chichester

Level 3 Expert

22669 Answers

Jonathon summesfield

Level 2 Expert

284 Answers

Bill Gilhooly
Bill Gilhooly

Level 2 Expert

94 Answers

Are you a Garmin GPS Device Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides