[ntp:questions] Help with NMEA driver

unruh unruh at wormhole.physics.ubc.ca
Fri May 27 14:11:39 UTC 2011

On 2011-05-27, Mischanko, Edward T <Edward.Mischanko at arcelormittal.com> wrote:
> Dave
> Several sentences are being sent and I currently have no way of disabling the unused ones.  I am trying to use $GPGGA because on this GPS it is supposed to be closest to the PPS pulse.  I am using ntp-dev-4.2.7p171

Why do you have no way of disableing them. The Sure packet commands have
been published.

> Thanks,
> Ed
> -----Original Message-----
> From: Dave Hart [mailto:davehart at gmail.com] 
> Sent: Friday, May 27, 2011 4:58 AM
> To: Mischanko, Edward T
> Cc: questions at lists.ntp.org
> Subject: Re: Help with NMEA driver
> On Fri, May 27, 2011 at 05:10 UTC, Mischanko, Edward T
><Edward.Mischanko at arcelormittal.com> wrote:
>> I tried this:
>> server mode 18 minpoll 4 prefer
>> Mode 18 didn't want to work, but mode 16 does work. ?What am I doing
>> wrong? ?I verified that the GPS is sending $GPGGA sentences at 9600
>> baud. ?Should I try mode 2 at 4800 baud? ?I am using a Sure GPS on a
>> Windows XP machine, but that shouldn't be a factor?
> What version of ntpd are you using?
> Is your GPS sending only $GPGGA, or are there several sentences being
> sent each second?
> Cheers,
> Dave Hart

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