1- It seems clear the Raspberry pi is used to get all the information on ethernet from 183 and 2k to connect to OpenCPN. It can also allow routing gps, depth..ect to the Zeus. It provides AIS to openCPN and possibly Zeus.. You seem to have an issue that not everything is able to talk 2k.. so the PI converts these 183 devices to ethernet.. it also connects your 2k devices to ethernet.Greetings, just bought a 2008 Hanse 470 with a mix of unique tech/networking.
The previous owner had 2 Nav system (1) an Unbuto based Open CPN system running on an old Intel I3 box with a VGA monitor display (2) a Triton B&G chartplotter on a NMEA 2000 backbone.
Hopefully the image i hoped to attach is visible,
If you can see the image, you will note that (1) there is a Rasberry hub in the Middle with connection to
*a wifi routner.
- an older Garmin 1083 Auto-Pilot,
- a USB based older GPS Puck,
- AIS feed,
- NMEA 1083 <-> 2k converter,
M goal is to get as close to a functioning NMEA 2000 backbone, Get rid of the 7 year old slow Unbutuu box out of the way, and use the existing AutoPilot and AIS GPS for another season.
Question 1: can anyone explain what the Rasberry does? Is it multiplexing,
Question 2: will this work better - run everything off of the B&G chart pllotter and forget about the Unbuto box.
(a) connect the AutoPilot to the NMEA 2K backbone with a dedicated NMEA 2k <-> 1083 converter box
(b) connect the AIS to the network with a dedicated NMEA 2k <-> 1083 converter box
(c) buy a high accuracy GPS antennae and connect it directly to the NMEA 20 Network.
Question 3: Why is everything connected to a wifi router - specifically the radar?
Question 4: why is the radar connected to the wifi router and can it connect directly to the NMEA 2k backbone?
2- Depends if Zeus is able to do something with all the data. OpenCPN can digest a multitude of sources. Your 183 devices dont seem to be able to talk 2k.. so the only solution is convert 183 to 2k.. which your existing solution can provide through the PI. Or the 183 can connect to ethernet through the PI.
3,4- Radar must connect ethernet.. 2K is way too slow to send high precision radar across. It could be that the PO realized the radar must connect to Zeus through ethernet, so just added the router and connected everything else up also.
I somewhat agree the existing system seems a bit dependent upon a variety of different pieces.. it is not clear all of your pieces would work properly with 183/2k converters.. the fundamental issue is that 183 is not able to digest all the information coming from 2k.. so the 183 converters will be overloaded without some type of sentence filtering.. the PI is capable of filtering certain sentences.. depending how it was programmed.
As a side issue.. the future is ethernet.. not 2k