I have installed OpenCPN
on a Raspberry Pi 4, and would like to do a bit more than chart plotting. My boat
has a couple of old B&G Network Speed and Depth
devices, connected to a B&G Network Data in the nav station. I think it should be possible to connect the output from the Data device to my RPi through a serial
(RS422) to USB converter/optical isolator (which I have already purchased - picture attached). However, I am a total neophyte in these matters and would need help identifying what each of the pins in the B&G connector is and where in the RS422 optical isolator they should be plugged to. Additionally, I would appreciate some general (and easy to understand) guidance on how to use SignalK to receive the NMEA0183 input and make it usable by OpenCPN
. Your merciful guidance will be most appreciated by this newbie.