How to maximize GPS battery life ?
sylvain.pare at gmail.com
Fri Sep 10 12:21:53 CEST 2010
you have qgpslog as an only logging app.
2010/9/10 Timo Juhani Lindfors <timo.lindfors at iki.fi>
> Xavier Cremaschi <omega.xavier at gmail.com> writes:
> > 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 ?
> The GSM chip has an ARM cpu. It is possible to run code on it and
> modify it to buffer the data to its own memory so that you only need
> to wake the main CPU once every 10 minutes or so.
> > - launch fsoraw -r GPS tangogps and start logging
> tangogps consumes cpu time uselessly. I just
> | nc localhost gpsd > $HOME/gps/`date -Iseconds`.dump
> currently with gpsd.
> > - let the FR disable display after 30s (problem : any touch on screen
> > will keep it up)
> I have been using
> for a year or so. It locks the touchscreen so that X does not see any
> events unless you swipe the screen slowly from top to bottom with your
> > 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 ?
> I carry a set of external usb batteries with me when mapping. See
> for more info.
> Openmoko community mailing list
> community at lists.openmoko.org
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