attention, I live in Italy and I don’t know if you receive the same satellites
i already used the ones above - it seems the data can be send to the module just fine allone it doesnt receive enough.
yes, i have one laying around too and the 02 had better gps while the 01 never worked for me - similar to the l5.
sure but at least it shows why i ses some satelites with no ss, it seems these are the sats that the device saw long ago when the tests occured in china (see location ‘latitude’: 23.680298666666665, ‘longitude’: 116.15435566666665).
so my l5 comes without gps. @purism: what can i do (and the others having the same problem)?
Yes, I get valid location data returned by the GNSS module and the location is correct to the extent that I can confirm it using my iPhone (and definitely not in China 
).
Purism sent me a tool gnss_test.py which gets a fix after ~120 secs as:
GPS 0.3
--------------------------------------
longitude XX.62259400
latitude XX.05272133
altitude (m) 563.77
accuracy 4.8
fix 3D
View sats
S24:31.0 S15:24.0 S13:30.0 S14:36.0 S23:20.0 S17:21.0 S05:21.0 S28:35.0
Solution sats
S24:31.0 S15:24.0 S13:30.0 S14:36.0
timestamp 2021-11-25 14:46:06.28
Fix time 1637851566.000
TTFF 120.5
(I deleted the real position with XX)
The values matches closely to what my UbuntuPhone E4.5 detects (in the pic the values in front of the decimal point are blanked-out):
I’m still struggling with a app Maps because even if the phone has a fix, the location shown in the map seems to be based on Wifi or cell towers.
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Where can one get this gnss_test.py script?
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The test scripts are currently available as snippets with the gnss-share repo
They will get packaged at some point into the librem5-devkit-tools. Those snippets will work with the python or go version of gnss-share. Do not install gpsd.
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That’s still expected at this point, but we’re working on making it work out-of-box (so Geoclue can access GPS readings and forward it to applications like Maps).
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Hmm,
Sadly the script doesn’t get a fix after being set outside for some time… Perhaps the gps is just busted on this thing.
What kind of output do you get from ?
socat unix-client:/var/run/gnss_share.sock -
Does gnss_test show any satellites ?
I get:
purism@pureos:~$ socat unix-client:/var/run/gnss_share.sock -
-bash: socat: command not found
Which pkg I’m missing?
socat needs to be installed
sudo apt install socat
It gives a bunch of data like this:
$GNGSA,A,1,,,,,,,,,,,,,99.0,99.0,99.0*1E
$GNGSA,A,1,,,,,,,,,,,,,99.0,99.0,99.0*1E
$GPGSV,3,1,11,01,77,077,,07,65,227,,30,52,292,,21,50,043,*75
$GPGSV,3,2,11,17,32,277,,22,28,121,,14,27,322,,03,21,131,*75
$GPGSV,3,3,11,08,20,048,,19,10,257,,09,06,203,,,,,*48
$GLGSV,1,1,02,87,41,012,,81,27,233,,,,,,,,,*60
$GPGLL,2256.33128,N,11351.74301,E,144745.000,V,N*48
$PSTMCPU,25.46,-1,49*4A
$GPRMC,144746.000,V,2256.33128,N,11351.74301,E,0.0,0.0,281121,,,N*75
$GPGGA,144746.000,2256.33128,N,11351.74301,E,0,00,99.0,031.00,M,0.0,M,,*65
$GPVTG,0.0,T,,M,0.0,N,0.0,K,N*02
The GSV lines are lacking the value which I inserted as ss:
$GPGSV,3,1,11,01,77,077,ss,07,65,227,ss,30,52,292,ss,21,50,043,*
which should be a two digit value between 00 and 99 and measures the signal/noise ratio. Without having them above 20++ for some minutes for some satellites, there will not be a fix.
@guru is correct. If that dump is from inside that is expected, please try the dump outside > 12 minutes.
The fact that the module is showing satellites is good, either it means the module has downloaded at least a partial almanac or you’ve uploaded an almanac to the module.
15 minutes outside, here’s a tail of the GPPSV:
$GPGSV,3,3,11,02,12,249,,01,11,042,,09,06,145,,,,,*4F
$GPGSV,3,1,11,14,81,157,,06,51,273,,17,49,008,,19,39,331,*70
$GPGSV,3,2,11,03,27,049,,22,20,044,,30,19,199,,11,18,244,*70
$GPGSV,3,3,11,02,12,249,,01,11,042,,09,06,145,,,,,*4F
$GPGSV,3,1,11,14,81,157,,06,51,273,,17,49,008,,19,39,331,*70
$GPGSV,3,2,11,03,27,049,,22,20,044,,30,19,199,,11,18,244,*70
$GPGSV,3,3,11,02,12,249,,01,11,042,,09,06,145,,,,,*4F
$GPGSV,3,1,11,14,81,157,,06,51,273,,17,49,008,,19,39,331,*70
$GPGSV,3,2,11,03,27,049,,22,20,044,,30,19,199,,11,18,244,*70
$GPGSV,3,3,11,02,12,249,,01,11,042,,09,06,145,,,,,*4F
It still has a few blank values in the commas. Does this mean the GPS is not working correctly?
Was in a open area and there wasn’t a cloud in the sky
I do not see any ss value between the commas.
There’s no SNR values in there so it’s not seeing any satellites. I’d contact support@puri.sm .
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I tried to get a fix on my L5, but I also do not see any ss values when I do:
socat unix-client:/var/run/gnss_share.sock - | grep -ai --line-buffered gsv
Here some output that I see:
$GPGSV,3,1,09,16,64,308,,27,48,175,,26,47,021,,31,36,071,*73
$GPGSV,3,2,09,04,35,320,,08,22,197,,03,23,258,,22,19,235,*74
$GPGSV,3,3,09,32,15,147,,,,,,,,,,,,,*47
$GLGSV,1,1,03,87,28,117,,86,16,051,,88,13,158,,,,,*57
I had the L5 outside for roughly 30 minutes, and for more than half a day close to the a window at the top of my house. The sky is cloudy nowadays here in the Netherlands. When the L5 was outside the number of satellites increased IIRC.
In the /var/cache/gnss_share/ directory, I only have a recent almanac.txt that I did not put there myself. It seems to update every day.
Should there also automatically appear an ephemeris.txt ?
# ls -l /var/cache/gnss_share/
total 8
-rw-r--r-- 1 root root 4464 Nov 30 08:57 almanac.txt
@steve: Did you contact Purism support? If so, what was their response?
My GPS does work (it takes some time to get a fix, but then I can use pure maps to navigate) but for me no ephemeris.txt file is created (while almanac is)
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I own two L5 devices, one does not see ss values and does not get a fix. The other, which sees ss values gets a fix even with cloudy sky in less than 2 minutes. It has also the two files ephemeris.txt and almanac.txt.
There are statements here in the forum that the reason could be a bad grounded antenna of the GNSS receiver chip. View this post: Librem 5 GPS/Location Tracking
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