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-   -   Your help needed in improving N810 GPS performance (https://talk.maemo.org/showthread.php?t=16084)

jussik 2008-02-05 10:14

Re: Your help needed in improving N810 GPS performance
 
Quote:

Originally Posted by ag2 (Post 138402)
It's only 17x22 mm. Roughly the size of a miniSD card. Sure they could find space for it in a 5" tablet.

Heh :) Open the device and see, or talk to an engineer who was involved if you can.

With the N800 you would have a point, but the N810 has significantly smaller dimensions and includes a slide-out keyboard. The thing is absolutely packed full, finding four square centimeters of empty space is an impossibility, IMO.

EDIT: forgot to mention the FM radio: I don't know which chip they used in N800, but AFAIK even the cheap FM receiver chips are smaller than 30 mm2. That was too much for the N810...

GeneralAntilles 2008-02-05 11:45

Re: Your help needed in improving N810 GPS performance
 
Quote:

Originally Posted by ag2 (Post 138402)
It's only 17x22 mm. Roughly the size of a miniSD card. Sure they could find space for it in a 5" tablet.

Like they found space for fullsize SD slots and an internal slot in the N810? Oh, right. ;)

cycroft 2008-02-05 11:56

Re: Your help needed in improving N810 GPS performance
 
With the new patched gpsd the fix times are really comparable to a standalone GPS unit. So why bother?

ArnimS 2008-02-05 12:12

Re: Your help needed in improving N810 GPS performance
 
I've taken the N810 out on a walk (cloudy day) on fairly open streets, and i did not get a lock between leaving my house and arriving at my destination (16 minutes).

Setting the device down (in the open) and not moving it seems to generally yield locks < 1 minute though. Is it normal for gps receivers to have more problems getting a lock when orientation varies frequently (hand-held)?

cycroft 2008-02-05 12:19

Re: Your help needed in improving N810 GPS performance
 
Yes, it takes longer when you are moving. Although I am usually able to get a lock while moving in a time range from 2 - 5 minutes, sometimes even faster. However, when you drive at 150 km/h it takes very long ;-)

anidel 2008-02-05 12:21

Re: Your help needed in improving N810 GPS performance
 
Looks like it is the case ArnimS...
I usually let it get the fix putting it facing the sky near the windshield and then putting it wherever I want as it is very good in keeping the fix after it got it (while it takes forever to get it when it is not in a good position).

tompe 2008-02-05 15:12

Re: Your help needed in improving N810 GPS performance
 
Quote:

Originally Posted by ArnimS (Post 138430)
I've taken the N810 out on a walk (cloudy day) on fairly open streets, and i did not get a lock between leaving my house and arriving at my destination (16 minutes).

Setting the device down (in the open) and not moving it seems to generally yield locks < 1 minute though. Is it normal for gps receivers to have more problems getting a lock when orientation varies frequently (hand-held)?

I do not thinks it is the movement that is the problem. I noticed the same thing with my BT-338 and I think it was my body (full of water...) that blocked some of the signal. If I held out my arm with the GPS in my hand I got a fix.

TA-t3 2008-02-05 15:36

Re: Your help needed in improving N810 GPS performance
 
Consumer-grade GPS units in general have big problems getting initial lock if you're moving. Better keep still until it's got a fix, then start moving. (Some, particularly new GPS units, are better at this though. My TomTom Mark I GPS locks fast when still but takes a very long time if I move (in both cases it's located at its normal place in the car). I haven't yet tested my Holux M1200 for this.)

callanish 2008-02-05 20:35

Re: Your help needed in improving N810 GPS performance
 
Quote:

Originally Posted by cycroft (Post 138423)
With the new patched gpsd the fix times are really comparable to a standalone GPS unit. So why bother?

For the newbies in the crowd, can someone please provide me with the exact steps needed to patch the gps software in the Nokia N810 to possible fix this slow sat aquire issue.

I've downloaded the osso-gpsd_1.0-25.tar file. I've extracted the contents in to the internal memory of the Nokia. what do I need to type in to xterminal to actually apply the patch?

Any help would be appreciated.

ag2 2008-02-06 06:12

Re: Your help needed in improving N810 GPS performance
 
Quote:

Originally Posted by GeneralAntilles (Post 138420)
Like they found space for fullsize SD slots and an internal slot in the N810? Oh, right. ;)

Fullsize slots are not essential on N810 and neither is an FM radio. microSD cards work just fine. On the other hand, a high quality GPS receiver takes the device to a whole new level.

I wouldn't mind buying a tablet that was 1.5 mm thicker, or had a slightly smaller battery, in return for 1 second TTFF with offline AGPS. Perhaps this is just me.


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