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Connecting a backup battery to the MTK GPS

Posted by Dror Caspi on April 18, 2011 at 4:59am

If you use the DIYDrones MediaTek GPS, you're probably aware of the fact that, on each activation, it make take a very long time to get proper satellite lock. The reason is that it always starts from scratch; it is not aware of it approximate geographic location, not of the time.


The reason for this is lack of backup battery. Data is completely erased once you disconnect the main battery.

The GPS module itself has a backup battery input. I added a new Wiki page to the ArduPirates Wiki that shows how to connect an external battery to that input.

http://code.google.com/p/ardupirates...backup_battery  (link fixed)


2011_0415%2003%20%20GPS%20backup%20battery.JPG


Dror

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Replies

  • Moderator
    John Church December 31, 2011 at 12:12am

    Bumping an old thread, but... Dror, how is this mod holding up for you? Notice any ill effects?

  • Andrew Radford April 19, 2011 at 3:01am
    Does the MTK protocol include gets and sets for almanac information for Assisted GPS?
  • Sebastian Gralla April 18, 2011 at 5:07am

    early versions of Mediatek GPS had a backup battery, they was removed because it made ist "unstable"

    I don't know how this affects the lock or something, i never had one

This reply was deleted.

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