Re: Strange troubles with emulation

[Gary E. Miller]

Yo Владимир!

On Fri, 29 Jan 2021 23:46:30 +0300
Владимир Калачихин <v.kalachikhin@gmail.com> wrote:

> 29.01.2021 21:02, Gary E. Miller пишет:
> >>> gpsd knows that you can not have any fix at all with zero
> >>> satellites in use, so gpsd sets "No Fix" ("mode":1).  
> >> I trust that You have a strong reason for this decision.  
> > Looking in the logs, that has been there a long time.  It is a good
> > sanity check.  There is so much flakey NMEA that sanity checks are
> > good.  
> 
> Loran-C, of course, is obsolete, but gpsd may receive this via lan,
> for example. Her GGA sentence will have 0 sattelites.

Loran-C would have nothing, not zero, in that field, thus not an issue.

A recevier reporting Dead Reckoning would fail.  If taht case came up,
that would then need a special case on the special care.  That is how
driver_nmea0183 became little but special cases.

> > Easier to fix your GGA, set sats used to 4.  One line of sed could
> > do that.  
> 
> Should it be understood that gpsd ignore checksum?

Nope, you would have to also fix the checksum.  But that is easy.

RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  Tel:+1 541 382 8588

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