Hi Sam, > As this will happen every, say, two hours I'd like the Pi to shutdown > or hibernate between program executions. Currently I'm thinking about > using a RTC with rtcwake(8).
The Pi doesn't have a real-time clock chip and battery, i.e. something that keeps track of time passing when power is off. A bit of Googling suggests rtcwake(8) has issues on the Pi because of this; no rtc device found. I could be wrong. There are things like http://spellfoundry.com/products/sleepy-pi/ that have a second device to power up the Pi at the allotted time. It could then take its picture and shutdown again. There's probably cheaper similar things about? 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
