How to Add an Altimeter to a TomTom

by Deborah McDonald

TomTom is one of the most popular automotive navigation systems, and is produced by the Dutch company of the same name. While the TomTom GPS has a number of useful features besides navigation, such as traffic and fuel prices, it doesn't naturally have an altimeter or altitude indicators. For this features, one has to download and install homebrewed applications made by fans of the TomTom GPS.

1

Go to Joghurts GPS-Site (see Resources).

2

Click "Projects."

3

Click "Height."

4

Download "height_17.zip."

5

Unzip "height_17.zip." by double clicking the file. If you have a decompression program on your computer, it will automatically unzip the file for you. If you don't have a decompression program, you can download Winzip, Winrar or the Microsoft Windows Zip Utility for free (see Resources). Any of those three programs will be able to unzip this program for you.

6

Connect your TomTom to your computer's USB port using the device's USB cord.

7

Open your TomTom's root directory. In Windows, go to my computer and double click the icon marked "External Drive." In Mac OS X, click Finder and select the icon marked "INTERNAL."

8

Put the cab file and the two directories you extracted from "height_17.zip" in your TomTom's root directory. This should add the altimeter to your TomTom on the Navigation screen.

9

Disconnect your TomTom from your computer.

Configuration

1

Turn your TomTom on.

2

Go to the Navigation screen. It should appear as it normally does with the addition of the altimeter. If it does not appear this way, it will show a number of one to five digits without an identifying unit. This is the screen's identification number.

3

Write the identification number down.

4

Switch the mode of your TomTom. If it's in Day mode, switch to Night, or vice versa. Another number will appear.

5

Write the new number down.

6

Remember which number you got during "Day" mode and which you got during "Night."

7

Connect your TomTom to your computer.

8

Open your TomTom's root directory. In Windows, go to my computer and double click the icon marked "External Drive." In Mac OS X, click Finder and select the icon marked "INTERNAL."

9

Open the "Height" directory.

10

Double click height.cfg. In Windows it will open in Notepad. In Mac OS X it will open in Text Edit.

11

Change the number behind the "d" to the identification number you got in "Day" mode.

12

Change the number behind the "n" to the identification number you got in "Night" mode.

13

Save your changes and close the program.

14

Disconnect your TomTom from your computer.

15

Turn your TomTom on. It should now be working with an altimeter.

Warning

  • close As any altimeter you add to your TomTom is a third party program, there will always be a risk that it can freeze your TomTom or cause it to have unexpected bugs. If this occurs, simply open your root directory again and delete the files you've added.

References

About the Author

Deborah McDonald has been a writer since 1982, producing articles specializing in topics ranging from insurance and risk management to art and education. She's been published in numerous publications, including "The Lantern" and on Digg.com.

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Photo Credits

  • photo_camera gps navigation system in car image by jedphoto from Fotolia.com