Never getting GPS lock

[Ben Wilson]

I seem to have got it working, although I’m not too sure how.

It finally got a fix when I was inside playing around with different 
gllin options.
I tried the "cold" option (cold start) and then “-sim“ (not using 
simulator) 5min after that it was getting fixes.
Although I can't be sure the different options had anything to do with 
getting it to work and I have no idea why it would have been using the 
‘simulator’ in the first place since I was using a normal buildhost 
image and standard gllin ipk

In any case, it's working now so i'm happy :)

Thanks for your help

Ben.

Ben Wilson wrote:
> na, i'm on a hill, it's pretty much wide open sky.
> Unobstructed to horizon for 180deg, other 180deg is about 60deg above 
> horizon
>
> Lally Singh wrote:
>> From: http://blogs.msdn.com/coding4fun/archive/2006/10/31/912287.aspx
>>
>> $GPGSV,2,1,08,01,40,083,46,02,17,308,41,12,07,344,39,14,22,228,45*75
>>
>> Where:
>> GSV Satellites in view
>> 2 Number of sentences for full data
>> 1 sentence 1 of 2
>> 08 Number of satellites in view
>>
>> 01 Satellite PRN number
>> 40 Elevation, degrees
>> 083 Azimuth, degrees
>> 46 SNR - higher is better
>> for up to 4 satellites per sentence
>> *75 the checksum data, always begins with *
>>
>> Looks like you're only seeing 1 satellite. Are you in a city or
>> somewhere else where you'd have a lot of obstructions?
>>
>> You need line-of-sight with 4 (preferably more) to get a lock.
>>
>> On Sun, Feb 24, 2008 at 8:38 PM, Ben Wilson <ben at abcom.co.nz> wrote:
>>> Hi
>>>
>>> My gta01 never gets gps lock, i've had it outside for over 15min on
>>> multiple occasions over the past few months with no luck.
>>> I followed the instructions here
>>> http://lists.openmoko.org/pipermail/community/2007-November/011916.html
>>> to get gllin installed
>>> and i do get the $GPxxx info, it just never locks. (Always A1).
>>>
>>> I get the date on the $GPRMC line which i've been told means the gps
>>> receiver has found at least one satellite.
>>> I've tried it on different kernel/rootfs images and i get the same 
>>> thing.
>>>
>>> Does anybody else have this problem?
>>>
>>>
>>> GPS Output
>>> ---------------
>>> $GPRMC,005141.53,V,,,,,,,250208,,,N*77
>>> $GPGSV,1,1,01,19,,,31*72
>>> $GPGSA,A,1,19,,,,,,,,,,,,11.2,5.0,10.0*3E
>>> $GPRMC,005142.53,V,,,,,,,250208,,,N*74
>>> $GPGSA,A,1,19,,,,,,,,,,,,11.2,5.0,10.0*3E
>>> $GPRMC,005143.56,V,,,,,,,250208,,,N*70
>>> $GPGSA,A,1,19,,,,,,,,,,,,11.2,5.0,10.0*3E
>>> $GPGGA,005145.58,,,,,00,00,5.0,,M,0.179099,M,0.07
>>> $GPGSV,1,1,01,19,,,30*73
>>> $PGLOR,IGR,81.2,7,71389,0,1*0D
>>> $GPRMC,005146.52,V,,,,,,,250208,,,N*71
>>> $GPGSA,A,1,19,,,,,,,,,,,,11.2,5.0,10.0*3E
>>> $GPRMC,005147.56,V,,,,,,,250208,,,N*74
>>> $GPGSA,A,1,19,,,,,,,,,,,,11.2,5.0,10.0*3E
>>> $GPGGA,005149.48,,,,,00,00,5.0,,M,0.179099,M,0.0A
>>> $GPGSV,1,1,01,19,,,32*71
>>> $GPGGA,005150.52,,,,,00,00,5.0,,M,0.179099,M,0.09
>>> $GPRMC,005150.52,V,,,,,,,250208,,,N*76
>>> $GPGSV,1,1,01,19,,,31*72
>>> $GPGSA,A,1,19,,,,,,,,,,,,11.2,5.0,10.0*3E
>>> $GPGGA,005152.54,,,,,00,00,5.0,,M,0.179099,M,0.0D
>>> ---------------
>>>
>>> Thanks
>>> Ben.
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> OpenMoko community mailing list
>>> community at lists.openmoko.org
>>> http://lists.openmoko.org/mailman/listinfo/community
>>>
>>
>>
>>
>
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