Yes, it's fine (preferred) to have these discussions on the list so that others can benefit from our collective wisdom in the future.
MQTT would be another good transport. "mosquitto" is pretty lightweight server , and there are plenty of tiny clients that run on resource constrained systems like esp8266. I use the esp8266+MQTT combo for home automation.
Anyway, if UDP with nmea sentences works for you, that's great. If you're still designing, you might want to use the json format and let gpsd handle assembing all the nmea sentences into one complete TPV solution message.
Владимир, Gary, Nick, Chris, Bo, Patrick,
Thank you so much for your answers. Hope it's okay I respond to you all in
this email.
The reason why I want to test this (it's all for fun), is that I've seen it
done on vessels (ships, acquiring e.g. echosounder data). Instead of clients
connecting to a server, the device responsible for location data (i.e.
GPS/GNSS) will send datagrams (containing NMEA sentences) to the network
broadcast address. In my naive case, rogue devices spraying bogus data do not
exist.
To me this seems simple and efficient: if you care about the data, all you have
to do is listen. A downside is of course that you're, well, broadcasting data
to the whole network.
Mosquitto/MQTT looks interesting.
Best regards,
Andreas
On Wed, Mar 13, 2024 at 6:45 PM Gary E. Miller <gem@rellim.com> wrote:
>
> Yo Andreas!
>
> On Wed, 13 Mar 2024 12:31:47 +0100
> Andreas B <panden@gmail.com> wrote:
>
> > Not strictly a gpsd question, but with all the competence here, I just
> > have to give it a shot.
>
> Close enough.
>
> > What's the best way of broadcasting nmea (or other data) to the
> > network? Can gpsd do this, or do you use netcat/socat?
>
> gpsd serves TCP lcients, so not broadcast. I'd give netcat a try.
>
> Any reason not to use TCP?
>
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
> gem@rellim.com Tel:+1 541 382 8588
>
> Veritas liberabit vos. -- Quid est veritas?
> "If you can't measure it, you can't improve it." - Lord Kelvin