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Serial Object GPS Example Code

3.8 | 10 ratings Rate this file 16 Downloads (last 30 days) File Size: 18.5 KB File ID: #3223 Version: 1.1

Serial Object GPS Example Code


Peter Webb (view profile)


01 Apr 2003 (Updated )

Read tracklog data from Garmin eTrex GPS devices.

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This file contains the example code for the May 2003 News and Notes article "Importing Data via the Serial Object in MATLAB". The included M-code will read track log data from a Garmin eTrex GPS (Global Positioning Satellite) device and produce an analysis and visualization of that data. See the readme file (and the News and Notes article, posted on the MathWorks web site) for further details.

MATLAB release MATLAB 6.5 (R13)
Other requirements Other than MATLAB 6.5, with Java enabled, to fully exercise the example, you need two pieces of hardware: a COM port and a Garmin eTrex GPS device.
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Comments and Ratings (15)

how to access this file

Comment only
20 Jan 2014 Pawel

Pawel (view profile)

Does anyone else have similar applications for DR / GPS? I mean for example the position of a vehicle using GPS which will cooperate with the DR and the results will be the processing of a Kalman filter

Comment only
23 Jul 2012 Da Na

Da Na (view profile)

work great,very cool

02 Nov 2007 mie wryant

thanks for th files.
this very easy to use.
but i have problem with OpenGPS.m
the error message is
"??? Undefined function or method 'OpenGPS' for input arguments of type 'char'."

can you help me again please.

12 Apr 2007 houssam SASSINE

14 Mar 2007 Olivier Progin

05 Jan 2007 Steven Kolak


MATLAB supports serial devices including RS-232 using the Instrument Control Toolbox.

When you use Instrument Control Toolbox, you are provided with a graphical tool to configure and control your serial device in MATLAB without writing MATLAB script. In fact, the tool automatically generates MATLAB script that you can reuse in your application. Type "tmtool" to launch this tool.

Visit the MATLAB serial resource page for more information and a downloadable MATLAB code example automatically generated with the graphical tool provided by the toolbox:

Comment only
15 Dec 2005 Alon Alfa

"min" is a function and a var.
change the name of the function.

01 Jul 2005 vimal patel

it is very good

24 Mar 2005 Walter Allensworth

Well I got it reading data from my Garmin Etrex Legend in Matlab 6.1 after about 90 minutes of code debugging. There were many instances of '&&' in several functions where a single '&' were needed, and the final line in the sizeof.m function needs to be changed to:
s = getfield(typemap,type);

It's also a bit slow downloading the track-files, but that's OK.

Lastly, the analysis program has big trouble if you've got several dirrerent tracks in your GPS from different locations. So... you should clear it before capturing just the track you want.

What I was really looking for when I stumbled on this code is Matlab S/W that will read a NMEA string output from the GPS so I can store it in a file of my own format.

Is there code around to do that?


01 Jul 2004 carlos rodrigues

I meed a funcion to read a serial port.
I meed to read data from de port.

27 Mar 2004 Abdul Nasser

gathering information on matlab.

Comment only
23 Jan 2004 enes koytak

can anyone send me a matlab 6.5 version? it doesn't work :(

Comment only
22 Jul 2003 Mike Roberts

Works great, with a couple of tweaks for version 6.1. Very cool application.

21 Jul 2003 Mike Roberts

Was using eTrex Legend and Matlab 6.1 - are the differences between 6.1 and 6.5 sufficient to prevent this from working ?

Looks like a very useful application base, if I could get it to work.

17 Nov 2010 1.1

Added BSD license.

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