NMEA 2000 networks are part of any connected boat, and can be problematic by nature of their design. Troubleshooting an N2K network can be done very easily and cheaply, or you can use more advanced tools.
The Yacht Devices Voyage Recorder is a great device to add to your NMEA 2000 network as a “black box” recorder. Almost anything from the network can be recorded and analyzed afterwards for trip records, performance analysis, or more.
The Maretron SMS100 is a great way to remotely monitor your boat if you have Maretron devices already on the network. It works with other things as well, but you need at least one device to configure it, and it still has some bugs.
I continue to tweak my scripts and data collection on my NMEA 2000 server that I added to last year in Data collection from the sailboat. They are not even close to being ready for prime time, but the data I’m collecting is starting to force me to adapt the system