Make rover GGA data available to clients

[spencerryan]

We have started using RTKBase's caster service over Tailscale to work around some issues with our cell carrier filtering/blocking port 2101 traffic, which works excellent.

During this testing I realized that AgIO can (and does by default) send GGA information back to the caster at fixed intervals.

I'd love it if RTKBase could make this information available on another port. I'd like to build a quick open source "Rover tracker" that would simply put the location of the rover(s) on a map that would periodically update (Sadly no speed data in GGA)

I would love it if the output could be in a JSON key/value pair that included the client's IP as the key and the raw GGA string, and then it could be parsed downstream as needed.

Thank you for an awesome project!

[Stefal]

I don't know is str2str can output the received GGA to another stream. If you know how to do this, please share, and I will have a look.