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Re: [gpsd-users] GPSD issues on Raspberry Pi running Raspbian

From: Pedro Vaz Teixeira
Subject: Re: [gpsd-users] GPSD issues on Raspberry Pi running Raspbian
Date: Fri, 24 Feb 2017 12:45:18 -0500

Hello Mark,

On Fri, Feb 24, 2017 at 12:22 PM, Mark Atwood <address@hidden> wrote:
Hello Pedro,

The microserver howto sources are at

Are you comfortable opening a pull request with the necessary correction?

Definitely, will get on it over the weekend - thanks for letting me know.


It's ok if not, we can just change it.  But we would like to see you property credited in the git history.


On Thu, Feb 23, 2017, at 08:49, Pedro Vaz Teixeira wrote:
Gary --  the issue was indeed that gpsd was not being run with sudo. Could I perhaps suggest to change the NTP microserver tutorial accordingly?
David -- thank you for those links (and putting those online). After I got it to work last night (offsets are now consistently below 500us) I started looking into your pages, and especially the performance plots.


On Thu, Feb 23, 2017 at 4:30 AM, David J Taylor <address@hidden> wrote:

I am trying to setup a raspberry pi (model B rev 1.0) as a Stratum 1 microserver, and am following the procedure described in [1]. So far, I've had mixed results: while I've had to change some of the build commands [2], I have been able to build both gpsd and ntpsec on the raspi. The one issue blocking me right now is that I am unable to have gpsd output time notifications via shared memory (confirmed by ntpshmmon showing no output and ntpq -p showing a reach of zero for both gps and pps sources).
Thanks in advance, and kind regards,


You may find form useful notes here - using the reference implementation of NTP.

More background and how it developed over time:

I get excellent performance from a model B Raspberry Pi with gpsd/ntp:

Having it in an unheated cupboard undoubtedly helps!

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