Connecting to NMEA 2000 Network

[Hakan]

Re Hakan's comment -"but other devices using similar technical function may also work."

What other adapters support the Data Link Escaping (DLE) protocol? Is this just opening a pandora's box should users ask about which other devices are supported?

I've a possible memory once testing a ShipDriver device and it was working. Though I'm not 100% sure it was N2k and not N0183 I received. If anyone have such a device it's easy to try. The word "may" would not force anyone to purchase anything not mentioned.
But if you have doubts and the text can confuse we just take it out again?

[rgleason]

SignalK in the wiki is found under Supplemental Hardware
https://opencpn.org/wiki/dokuwiki/do...ftware:signalk


Read and use signalK data
https://www.cruisersforum.com/forums...d.php?t=251679

Connections after hibernate
https://www.cruisersforum.com/forums...d.php?t=279118


Nmea2k in Opencpn
https://www.cruisersforum.com/forums...d.php?t=276825

Twocan pi
https://www.cruisersforum.com/forums...d.php?t=209706

[Aldebaran17]

Originally Posted by stevead

The following NMEA 2000 Parameter Group Numbers (PGN) are supported.

• 60928 ISO Address Claim
• 126996, NMEA Product Information
• 128259, Speed (1)
• 128267, Depth (1)
• 129025, Position (Rapid Update)
• 129026, COG/SOG (Rapid Update)
• 129029, GNSS Position
• 129540, GNSS Satellite Data (1)
• 129038, AIS Class A Position Report
• 129040, AIS Class B Position Report
• 129041, AIS AToN
• 129793, AIS Date & Time Report
• 129794, AIS Class A Static Data & Voyage Report
• 129798, AIS SAR Position Report
• 129809, AIS Class B Static Data Report, Part A
• 129810, AIS Class B Static Data Report, Part B
• 130306, Wind (1)
• 130312, Temperature (1)

1. These are only parsed and displayed in the Dashboard plugin.

On my system (Raspberry Pi, Debian Bullseye, Waveshare Canhat, OpenCPN 5.8.4) the following corrections need to be made to the above table:

PGN 130312 not recognised:
<GREEN>18:31:45 (N2000) PGN: 130312 Source: nmea2000 socketCAN-can0 ID: 0 Desc: Temperature. Not used by OCPN, maybe by Plugins


The following PGNs are recognised and the info could be added to the table:
<GREEN>18:29:34 (N2000) PGN: 126720 Source: nmea2000 socketCAN-can0 ID: 1 Desc: No description. Not used by OCPN, maybe passed to plugins
<GREEN>18:29:34 (N2000) PGN: 127245 Source: nmea2000 socketCAN-can0 ID: 1 Desc: DBoard: Rudder data
<GREEN>18:29:34 (N2000) PGN: 127250 Source: nmea2000 socketCAN-can0 ID: 0 Desc: Heading rapid
<GREEN>18:31:45 (N2000) PGN: 127257 Source: nmea2000 socketCAN-can0 ID: 35 Desc: DBoard: Roll Pitch


The following PGNs are n ot recognised, but would be nice to add to O:
<GREEN>18:31:45 (N2000) PGN: 130314 Source: nmea2000 socketCAN-can0 ID: 0 Desc: Actual Pressure. Not used by OCPN, maybe by Plugins
<GREEN>18:31:45 (N2000) PGN: 130316 Source: nmea2000 socketCAN-can0 ID: 0 Desc: Temperature extended range. Not used by OCPN, maybe by Plugins


Best,

Manfred

[Aldebaran17]

On the wiki NMEA200 it says:

We need screen shots showing

OpenCOPN Connections dialog for adding the NGT-1 or YDNU-02 on Windows,
Mac or Linux
Configuration of a SocketCAN device on Linux.

I am happy to provide a screen shot, however in OpenCPN there is only the need to activate the available socketcan, e.g. can0. So, a screen shot will not be very informative.


More important are the changes to config.txt and interfaces, where my installations deviates slightly from the info on the web page, which worked on buster, but not on bullseye any more (at least for me).

So, here is my installation:

This works for the following system: Raspberry Pi 4B, Debian Bullseye, Waveshare Canhat, OpenCPN 5.8.4

Add the following lines to /boot/config.txt/

dtparam=spi=on 
dtoverlay=mcp2515-can0,oscillator= 12000000,interrupt=25,spimaxfrequency=1000000



check if there is a file /etc/network/interfaces

with the following content:

# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d


create file /etc/network/interface.d/can0


with the following content:

#physical can interfaces
auto can0
iface can0 can static
bitrate 250000
pre-up /sbin/ip link set can0 type can restart-ms 100
down /sbin/ip link set $IFACE down
up /sbin/ifconfig $IFACE txqueuelen 10000

[stevead]

Thanks Manfred for the corrections.

I should have reviewed the plugin source to determine what PGN's it consumes rather than guessing!

Regarding the setting for the Waveshare device, do you think we need to add these to the Wiki, or simply refer to the manufacturer's instructions? I think all devices based on the MCP2515 chipset (Waveshare, Copperhill) use very similar configuration settings.

[stevead]

Manfred, what plugins are installed ?
Just curious re PGN 126720, which is a manufacturer proprietary PGN. I know Fusion use it for controlling their media players, Raymarine for controlling Autopilots and it's also transmitted by a number of Garmin sensors.

[Aldebaran17]

Originally Posted by stevead

Manfred, what plugins are installed ?
Just curious re PGN 126720, which is a manufacturer proprietary PGN. I know Fusion use it for controlling their media players, Raymarine for controlling Autopilots and it's also transmitted by a number of Garmin sensors.

It's a Raymarine SPX-5 wheel pilot.