Make sure all the programs/OS are using the correct ports
. You might need a small program to monitor
your com ports. Select the port the device it's connect to and check to see if you are getting any serial
data. Forget OpenCPN right now. Make sure the OS is passing the data from the device. If so, then go to OpenCPN and make sure you have selected the correct port for the data.
This is serial
data and requires all the parameters be set correctly. With my Ublox I think I have 4800-N-8-1 set on my com port on Windows 8.1.