Power on device after being powered down

Ian Stirling OpenMoko at mauve.plus.com
Thu Aug 30 14:34:15 CEST 2007

Denis Parchenko wrote:
> I think that this feature must work in close conjunction with
> 'auto power on' feature mentioned earlier. It will be transparent for
> user, provide him quiet night and save battery power...

In principle, all this stuff can be done.

It's a simple matter of programming :)

You wake up either on a timer, (from suspend-RAM mode, which takes 
nearly no power) every 30s-5min or so, and check if 'stuff' has changed.
This might even include taking a GPS reading, or asking the phone for 
its cell-site ID, checking for bluetooth events, ... then go back to sleep.

It's looking like, with everything else off, the GSM modem uses around 
28% or so of battery per day.

If you want to turn everything off, including the modem, then you can, 
but this of course means you can't receive calls, or SMSs, and it may 
take a few dozen seconds to start, and several minutes to get cached SMSs.

If the user has said that they want no notification of calls for a 
defined period (say 1AM-8AM), with no exceptions, for example for calls 
from family, then turning the modem off may make sense.

More information about the community mailing list