Hi All, I had intended to use the RTC that Peter suggested without realising the Pi could not hibernate/sleep!
The Sleepy Pi module, if a little expensive, powered by the 12v socket looks like it'll be the way to go :-) Thanks, Sam On 8 March 2014 15:46, j...@gamesrealm.org <j...@gamesrealm.org> wrote: > Hi Sam, > > How about powering the Pi from the 12v socket in the car and using the £10 > RTC module for time keeping purposes if you need to switch it off? > > If you have it powered from the car battery you can leave it running and get > GPS data and images more regularly. > > Jon > > Sent from my HTC > > ----- Reply message ----- > From: "Ralph Corderoy" <ra...@inputplus.co.uk> > To: "Dorset Linux User Group" <dorset@mailman.lug.org.uk> > Subject: [Dorset] RPi Power Saving > Date: Sat, Mar 8, 2014 15:03 > > > Hi Peter, > >> There's an RTC module at ModMyPi.co.uk for £10. >> https://www.modmypi.com/rasclock-raspberry-pi-real-time-clock-module?filter_name=clock > > Right, that means the Pi can learn the date and time when it's powered > on instead of having to fetch it over the network. So it probably > provides the RTC part that rtcwake(8) needs. But AIUI the Pi doesn't > have a means to enter a low-power-consumption state; it's either on or > off. So something needs to cut power when told, e.g. on shutdown(8), > and turn it back on again at the right time and the Pi will then boot. > This RTC chip won't do that power-supply control, something more is > needed. > > Cheers, Ralph. > > -- > Next meeting: Bournemouth, Tuesday, 2014-04-01 20:00 > Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ > New thread on mailing list: mailto:dorset@mailman.lug.org.uk > How to Report Bugs Effectively: http://goo.gl/4Xue > -- > Next meeting: Bournemouth, Tuesday, 2014-04-01 20:00 > Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ > New thread on mailing list: mailto:dorset@mailman.lug.org.uk > How to Report Bugs Effectively: http://goo.gl/4Xue -- Next meeting: Bournemouth, Tuesday, 2014-04-01 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread on mailing list: mailto:dorset@mailman.lug.org.uk How to Report Bugs Effectively: http://goo.gl/4Xue
