No I am not using the milltech thing.
My GPS is a Garmin
GPS 16X, programmed to speak at 38400 baud, and also programmed for reduced sentences, to avoid clutter.
The Gps talks to the GX2150 and OpenCPN by splitting the signal one to two.
Ie the output of the GPS is Parallel to the GX2150 and an ATEN Serial
to USB adapter.
The Grey wire out of the GX2150 talks to OpenCPN via a second ATEN Adapter.
Both adapters are fed into a USB hub. They are on Com13 and Com14. OpenCPN is configured to listen on Com13 and Com14. AIS, DSC and GPS are therefore on the Laptop screen
I have a third ATEN adapter that is on Com12 that goes to the Autopilot
, and OpenCPN send route
and waypoint arrival sentences to the A/P via that.
Com 13 Also doubles up as my Pactor
connection via a RS232
Are you sure you have OpenCPN configured correctly? I would have to "see" your hookup to understand it and help you more.
Hope this helps, email
me if you need more info, I can't check here regularly.