Re: [Gumstix-users] Frequent power cycles

[Kirk M. <km...@ec...>]

Our connex sitting on a glacier in Iceland cold-boots at 12:00 once a 
day and seems OK so far... it would be good to know if there is a "show 
stopper".
Kirk
ps: just realised the "cold-boot" is literally cold! ;-)

Matthew Bowles wrote:
> Hi list
> 
> We have an application coming up where we want to cycle the power on our 
> gumstix COM a few times a day.
> Can anyone see any glaring issues with this? I'm concerned firstly with 
> the Flash integrity after repetitive boots.
> we are thinking in the order of 10 per day. (most likely 2 or 4, but 
> conceivably some applications could require 24, though unlikely).
> 
> will be taking some care to shutdown various processes when the power 
> cutoff is eminent. The gumstix will specify the exact moment of shutoff.
> 
> we are using a temp fs (tmpfs) for our running data. My understanding of 
> these is that after a power on reset the tmpfs will be effectively 
> re-formatted during the boot sequence. Is that true?
> 
> for those interested - or in case anyone's got a better and easier idea. 
> We are looking into a supervisor/monitor CPU to only power on the 
> GUMSTIX when necessary to save power. We are looking at sub 10mA on 
> average to suit a 5W solar panel (its close to the 'below-tempting' 
> threshold for thieves).
> 
> Best regards
>  
> Matt Bowles
> Embedded Systems Engineer
> */a/Wma**** Pty Ltd*
> */Water Control Solutions/*
> *Design - Manufacture - Install*
> -------------------------------------------------------------------------
> *Phone* 0427 680 641
> 
> *Web* _www.awma.au.com_ <http://www.awma.au.com/>   *Email__*_ 
> ma...@aw..._
> 
> 
> 
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Electronics and Computer Science
University of Southampton, UK
+44 (0)2380 594491
http://www.ecs.soton.ac.uk/~km