How to maximize GPS battery life ?

Martix at
Sat Sep 11 13:30:20 CEST 2010

you can save power by lowing GPS sampling rate:
AFAIK, sample rate should be configurable between 0.250-64 seconds.
Look at UBX protocol documentation for more power saving options:



2010/9/10, Xavier Cremaschi <omega.xavier at>:
> Hi folks,
> if I want to use my FR as a GPS track logger (for an OSM mapping party
> for example), what is the best way to save battery life ?
> It seems that GPS chip is able to keep the fix while FR is suspended
> (/sys/devices/platform/gta02-pm-gps.0/keep_on_in_suspend), but I need
> the CPU to log data, don't I ?
> Currently, I think I would do something like this :
> - shut down GSM (FR is also my phone)
> - launch fsoraw -r GPS tangogps and start logging
> - let the FR disable display after 30s (problem : any touch on screen
> will keep it up)
> Any idea ?
> Xavier.
> _______________________________________________
> Openmoko community mailing list
> community at

More information about the community mailing list