I'm running Open CPN
on a Dell notebook with Ubuntu Linux
. I use a USB GPS puck
. It all runs great. This weekend, I tried to hook up a used Nobletec 100 AIS
receiver via the 9-pin serial
port. I couldn't get it to work.
I'm beginning to think the problem might be in the baud rates of the two NMEA
streams. The GPS
transmits at 4800 baud. When I click on the "GPS" tab of the "Tools" menu in Open CPN
, I can then open up the NMEA
data stream box and see data streaming in from the GPS. When I unplug the GPS and leave the AIS
receiver plugged in, no data streams through the window.
I know that the AIS receiver transmits data at 38,400 baud. As far as I can see, there is no window available in Open CPN to see the AIS NMEA data stream. Or would that data appear in the same window as the GPS data stream if I had it all set up correctly? Do I need to change the settings of the serial
port in Linux
? If so, how would I do that? (Of course, it's possible this receiver isn't transmitting data, but I can't find a way to confirm or deny this at this point.)
In the "GPS" tab in Open CPN, when I look at ports
available, I see three COM ports
(they're called something like "tty" in Linux). I also see a "tty" port that ends in "usb" (this is the one that the GPS works on). I also see a "shared AIS/GPS port" selection.
In the "AIS" tab, I only see the three COM ports listed. The USB port and the shared AIS/GPS port don't show up.
Does this make any sense to those of you who know the inner workings of the Open CPN program? Am I doing something wrong?
Ideas for a fix?
Thanks in advance.