Hello all,
I'm using a Raspberry Pi B+ with a U-Blox Max7q GPS to drive a stratum 1 NTP
server. At the moment I'm at the point of following instructions and learning
as much as I can, and would like to know, based on the info below, if there's
anything I should do with things like PPS and/or PL
In an attempt to squeeze all I can out of a NTP and GPS/PPS setup on the
Raspberry Pi 2 I’m starting to experiment with compile flags using GCC 4.8.
Currently I have:
CC="gcc-4.8" CFLAGS="-mcpu=cortex-a7 -mfpu=neon-vfpv4" ./configure
--enable-NMEA --enable-ATOM --enable-linuxcaps --disable-all-
On 7 Mar 2015, at 14:16, David Taylor
wrote:
>
> On 07/03/2015 12:41, Neil Green wrote:
>> In an attempt to squeeze all I can out of a NTP and GPS/PPS setup on the
>> Raspberry Pi 2 I’m starting to experiment with compile flags using GCC 4.8.
>> Currently I have:
&g
On 10 Mar 2015, at 19:26, Mike Cook wrote:
>
>> Le 10 mars 2015 à 19:13, Neil Green a écrit :
>>
>>
>> Thanks to everyone who gave answers to my question. David, as the GPS I use
>> sits directly over the Pi I’ve just started a cron job to collect the CPU
I switched my NTP server from a Raspberry Pi to a Banana Pi and saw
(coincidentally, I believe, given the time the change occurred) the following
change in stats on www.pool.ntp.org:
http://deskbound.org.uk/files/ntpstats.png
Can anyone explain why things should improve so dramatically for 24 h
Hi all,
I have a stratum 1 ntp server running on Raspbian on a Raspberry Pi (a Zero,
though this applies to any model Raspberry Pi) and I would like to see if it's
possible to reduce my rootdisp, which fluctuates between 1.000 and 1.400-ish.
It never drops below 1.000.
My ntp.conf:
---
drift
I'm configuring a Skytraq Venus GPS module and have the option to align the PPS
output to GPS or UTC. Which one is best for use over serial with NTP?
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I'm trying, and failing, to get ntp to talk to a Trimble Copernicus II receiver
outputting TSIP at 38400 over GPIO on a Raspberry Pi. NTP was compiled with:
---
./configure --enable-TRIMTSIP --enable-SHM --disable-ipv6 --ena
NMEA, but recommends TSIP for
full timing diagnostic information. Before buying, I wanted to see if using
TSIP with NTP was feasible.
Besides which, because it's there.
From: Joachim Fabini
Sent: 16 February 2016 12:22
To: Neil Green; questions@lis
NMEA, but recommends TSIP for
full timing diagnostic information. Before buying, I wanted to see if using
TSIP with NTP was feasible.
Besides which, because it's there.
From: Joachim Fabini
Sent: 16 February 2016 12:22
To: Neil Green; questions@lis
On 16 Feb 2016, at 3:57 pm, Paul wrote:
> You should use driver 29 (GPS_PALISADE) except two years on and there's been
> no interest in supporting newer Trimble devices (Resolution etc.). I can
> send you a patch (which also fixes the smal bug in the Thunderbolt code) that
> I'd expect to wor
Is there a generally accepted NMEA “best sentence” for use with ntp? For
example, I’ve seen GPRMC, GPGGA and GPZDA all individually recommended in
Google searches, variously at 4800 or 9600 baud. Will whatever sentence I
choose ultimately give the same results?
__
On 20 Feb 2016, at 9:52 pm, Hal Murray wrote:
> Do you have a specific brand/model in mind? (or chip set?)
Currently a SkyTraq Venus 6. My previous experiments with a Trimble Copernicus
II using TSIP proved fruitless (I know the Copernicus II will output NMEA
sentences but I’ve been strugglin
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