NMEA refclock

[dropkick23 at gmail.com]

are the default paths /dev/gps0 and /dev/gpspps0?  links are /dev/ttyAMA0
and /dev/pps0

Thanks
Fred

On Wed, Dec 2, 2020 at 6:51 PM <dropkick23 at gmail.com> wrote:

> Mode 1 is the directive to process RMC sentences and defaults to 9600 and
> the GPS is sending RMC @ 9600 and ppstest does show correct output.  I have
> a couple of other ntpd servers that are shm refclock.  Thank you for the
> heads up on  pool directive.  FYI HW is RPi3+ and GPS is from uputronics.
>
> Thanks
> Fred
>
>
> On Wed, Dec 2, 2020 at 5:31 PM James Browning via users <users at ntpsec.org>
> wrote:
>
>> On Wed, Dec 2, 2020, 4:12 PM Fred via users <users at ntpsec.org> wrote:
>>
>>> Trying to setup NMEA refclock.  I'm seeing the following error in
>>> ntpd.log:
>>> 2020-12-02T16:58:12 ntpd[705]: PROTO: NMEA(0) 804b 8b clock_event
>>> clk_no_reply
>>> 2020-12-02T16:58:13 ntpd[705]: PROTO: NMEA(0) 805b 8b clock_event
>>> clk_bad_format
>>> 2020-12-02T16:59:16 ntpd[705]: PROTO: NMEA(0) 806b 8b clock_event
>>> clk_no_reply
>>> 2020-12-02T16:59:17 ntpd[705]: PROTO: NMEA(0) 807b 8b clock_event
>>> clk_bad_format
>>>
>>> ntpq -p does not change from:
>>> NMEA(0)                                 .GPS.            0 l    -   64
>>>  0   0.0000   0.0000   *1.9531*
>>> + server pool
>>>
>>> *ntp.conf*
>>> server 127.127.20.0 mode 1 prefer
>>> fudge 127.127.20.0 flag1 1 flag2 0  refid GPS
>>>
>>> server 0.us.pool.ntp.org iburst
>>> server 1.us.pool.ntp.org iburst
>>> server 2.us.pool.ntp.org iburst
>>> server 3.us.pool.ntp.org iburst
>>>
>>> + ntpstat lines
>>>
>>> Any insight would be helpful.
>>>
>>
>> Without looking at all, I would guess that your GPS is not sending the
>> NMEA0183 sentences ntpsec was expecting. My course of action would be to
>> check the output of that GPS and look at the source to see what else could
>> trigger those messages. Also IIRC gpsd is the preferred interface to GPS
>> receivers and the pool directive should be used instead of the four server
>> directives. Better answers might come later.
>>
>>> _______________________________________________
>> users mailing list
>> users at ntpsec.org
>> http://lists.ntpsec.org/mailman/listinfo/users
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ntpsec.org/pipermail/users/attachments/20201202/33fc065b/attachment-0001.htm>