BTstack GPS - freezes on autolock - is this normal?

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Hi. I might be asking for the impossible here! I have an app called memory map 
which provides OS topographical mapping in the uk (amongst other places). It 
works very well and in fact can log trips (long runs and bike rides) using the 
internal gps even with the iphone (3g, jail broken using os4 with multitasking 
enabled) autolocked. Problem is this eats the battery. I thought a solution 
might be to use btstack gps to connect to an bt gps and share the battery load. 
This works wonderfully with btstack gps working in the background until the 
iphone either does an autolock or you press the sleep button. Memory map 
continues fine but btstack appears to freeze up- you can tell this as the time 
output freezes at the last output before the autolock. When the iphone is 
"woken up" I have to do a disconnect of the gps and reconnect to get a fix- it 
does not reconnect by itself. I have tried this with btstack as the only active 
app and still get the same problem. Should this be happening? Better still, 
should the btstack gps be able to maintain an active connection to the gps with 
the iphone in autolock?

Failing that can you think of an app that will kill the screen (rather than 
manually dimming to max) to save the battery without putting the iphone into 
autolock?

Sorry - so many questions, and thanks for all the hard work and support you 
clearly give!

Original issue reported on code.google.com by tri.boy....@gmail.com on 3 Aug 2010 at 10:25

[GoogleCodeExporter]

hi. BTstack GPS does not prevent the iPhone from sleeping. I thought about 
that, but I figured it would be the task of the app using (BTstack) GPS, as it 
has to do this already for using the internal GPS. Or is there a detail I'm 
missing.  

Other than that, I got told that the code to stop iPhone from sleeping from 
Insomnia code code project doesn't work on 4.0 anymore. 

Yllier made a "ScreenDimmer" package that mighe help you a bit.

Original comment by matthias.ringwald@gmail.com on 10 Aug 2010 at 3:27

[GoogleCodeExporter]

Thanks for the response.

I don't know if this is specific to the Memory Map app, but whilst it remains 
active even whilst the device is aspleep, it does not seem to keep btstack in 
the same state. When using the internal gps Memory map is able to track courses 
with the iphone apparently asleep.

I have found a work around of sorts though. If the ipod is turned on - a tune 
or playlist selected and put on repeat and the volume is put to zero, the 
iphone can be put to what appears to be asleep (is it actually asleep when the 
ipod element is playing - probably not) without an issue. Using my iphone 3G 
like this with 3g & wifi services turned off and turning the screen on to check 
where I am very infrequently I can log my course for about 15% of the battery 
life per hour which is not too bad at all - significantly better than using the 
the internal gps and much more accurately. I guess the ipod function must be 
using some battery life which would be nice to sort out eventually. 

Thanks again.

Original comment by tri.boy....@gmail.com on 11 Aug 2010 at 7:26

[GoogleCodeExporter]

Insomnia works for ios4 now. 
http://www.ijailbreak.com/cydia/insomnia-pro-v4-0-2-adds-ios-4-support-keep-wifi
-connection-alive/

Original comment by AgentBap...@gmail.com on 15 Nov 2010 at 6:18

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I just confirmed insomnia fixes the problem, I can make a video if need be. I 
am on 4.1. It does work. No FREEZE! YAY. Get insomnia until dev fixes this 
issue in house.

Original comment by AgentBap...@gmail.com on 15 Nov 2010 at 6:42

[GoogleCodeExporter]

Since the December 2010 update of BTstack, all connections are dropped and a 
low power mode is set for Bluetooth. It doesn't freeze anymore.

Original comment by matthias.ringwald@gmail.com on 2 Apr 2011 at 4:41

• Changed state: Fixed

[GoogleCodeExporter]

yeah insomnia now work for ios 4 now check it out here 
http://www.unlock-iphonesoftware.com/insomnia-pro-v4-0-2-%e2%80%93-adds-ios-4-su
pport-keep-wifi-connection-alive/

Original comment by Sp1d3...@gmail.com on 27 Oct 2011 at 6:59