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Re: [gpsd-users] GPS fix issues

From: Chris Kuethe
Subject: Re: [gpsd-users] GPS fix issues
Date: Wed, 12 Oct 2016 11:06:42 -0700

Totally a wild guess: your receiver is returning a position estimate with very high DOP or a fix with the Alarm or Void flags set until it firms up its solution.

To see exactly what's going on, try running gpsd in foreground debug mode (eg. gpsd -nND3 /det/ttyS1 2>&1 | tee gpsd.log) to capture gpsd's internal state, and use gpspipe to see what's being passed through. You'll want to use both "gpspipe -Ro gpspipe.raw.log" and "gpspipe -wo gpspipe.gpsd.log".  Comparing these logs might give you some insight as to the cause of the delay.


On Wed, Oct 12, 2016 at 2:46 AM, Florian Esteves <address@hidden> wrote:

Hi all,

I'm using gpsd on my embedded system based on an arietta G25 module running on Linux buildroot. I'm using gpsd to get positioning information, with a gps GlobalTop Ladybid 3 connected to a RS232 serial port.

The GPS communicate good and i can see NMEA frame, when it fix, it works perfectly but I have some fix issues when i'm running the gpsd deamon: without gpsd, fix time : arround 45sec and with gpsd arround 2min. I do all my tests in the same conditions, the only difference is gpsd

Do you know where this problem could come from ? Feel free to ask if you need more informations




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GDB has a 'break' feature; why doesn't it have 'fix' too?

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