The Autohelm ST4000 supports nmea 0183, however the older Autohelm 4000 units (before Seatalk) did not.
I don't suppose there is a way to send a waypoint to a GPS USB module and have it spit back the XTE. Then tinker with node red to make course corrections.
(I do have a small Garmin chartplotter but that would be cheating).
I don't suppose there is a way to send a waypoint to a GPS USB module and have it spit back the XTE. Then tinker with node red to make course corrections.
(I do have a small Garmin chartplotter but that would be cheating).