Seatalk1 success (but no AIS)

[marty_c]

Success today with Seatalk 1 and one of these puppies.
https://www.amazon.de/Channel-Optocouple...p_d_rp_1_t

I have a full Raymarine setup with:
ST40 BiData, ST6002, Ray49e VHF and a C120W chart plotter. There was an existing bunch of wires for the yellow and black connections and I've connected the black via a 4.7k resistor as per https://www.youtube.com/watch?v=XFOGrBmDhJg

The following data is available when I browse

environment.depth.belowTransducer
environment.water.temperature
navigation.averageSpeedThroughWater
navigation.courseOverGroundMagnetic
navigation.datetime
navigation.gnss.horizontalDilution
navigation.gnss.satellites
navigation.headingMagnetic
navigation.log
navigation.magneticVariation
navigation.position
navigation.speedOverGround
navigation.speedThroughWater
navigation.trip
steering.autopilot.state
steering.autopilot.target.headingMagnetic
steering.rudderAngle

However, with the painful raymarine magic I am able to see AIS info on the chart plotter and I was expecting that I would be able to see this on the Seatalk1 bus but I can't. Is there something I'm doing wrong?

Cheers

[Opie91]

Hi Marty_C

Almost certain the Seatalk1 bus cannot handle AIS data. Pretty sure your AIS data is getting to the C120W another way such as NMEA 0183HS or NMEA 2000.

What AIS transponder or receiver do you have?

[marty_c]

Hi Marty_C

Almost certain the Seatalk1 bus cannot handle AIS data. Pretty sure your AIS data is getting to the C120W another way such as NMEA 0183HS or NMEA 2000.

What AIS transponder or receiver do you have?

Thanks for the hint Opie91, 
The Ray49E VHF has NMEA In and Out + and - connections. Putting a LED across the NMEA In I can see GPS data going to the radio, now I just need to wait until some ships go past in the river to see if I get data out at the same time as AIS data on the chart plotter.

Can I just connect NMEA Out + and - to another port on the optocoupler and from there use another GPIO pin?

Cheers

[Techstyle]

I think the best way would be to connect into the Seatalk NG network and connect that to a CAN device connected to the PI or Pi's network see: https://openplotter.readthedocs.io/en/2....n_app.html

another way would be to listen to the NMEA 0183 traffic, but you are only interested in the 38400 baud rate connection, which is port 2 according to your manual. With NMEA0183 you can have multiple listeners but only one talker - so you could either listen to what is coming out of the chart plotter (Orange/Yellow, Orange/Brown). or what is going to the chart plotter from another device on Orange/white and Orange/green: see page 32 of https://www.vela-navega.com/forum/myfile...lation.pdf. to make this connection you need a RS422 to USB device - see https://openplotter.readthedocs.io/en/2....mples.html

[marty_c]

I think the best way would be to connect into the Seatalk NG network and connect that to a CAN device connected to the PI or Pi's network see: https://openplotter.readthedocs.io/en/2....n_app.html

another way would be to listen to the NMEA 0183 traffic, but you are only interested in the 38400 baud rate connection, which is port 2 according to your manual.  With NMEA0183 you can have multiple listeners but only one talker - so you could either listen to what is coming out of the chart plotter (Orange/Yellow, Orange/Brown).  or what is going to the chart plotter from another device on Orange/white and Orange/green: see page 32 of https://www.vela-navega.com/forum/myfile...lation.pdf.  to make this connection you need a RS422 to USB device - see https://openplotter.readthedocs.io/en/2....mples.html

Oops! The Ray49E is not providing AIS. I was getting confused with the MARPA output from the radar however I have just ordered a RS485 can hat.

<Background>
In my Greenline 33, all up I have the Raymarine gear (C120W + ST6002 + Ray49E + ST40BiData + 4kw Radome E92129)

AND the Volkswagen TDI150-5 (https://www.manualslib.com/products/Volk...14864.html) which has canbus available.

AND an Iskra 7kw motor / 5kw generator that also has canbus providing data to their custom configured indicator.

All of this tied together with 
1.5kw of solar -> 48v victron MultiPlus 48/3000/35 -> 240v -> Victron 12v battery charger -> house + engine + bowthruster batteries

_One day_ I'd like to get it all working thru a series of consoles. I'm thinking 

1. Summary page
2. Navigation info - Lat, Long, SOG, BoatSpeed, Depth, 
3. Battery info - 48v, 12v, ConsumedEnergy, 48v SOC (%), TTG
4. Diesel Engine info - EngHrs, L/ph, RPM
5. Electric motor info - RPM, Motor temp, Batt temp
 
I did get these https://www.amazon.de/gp/product/B07SYH9...UTF8&psc=1 but thinking now that they are not compatible and I've got this https://www.amazon.de/gp/product/B01LZ6W...UTF8&psc=1. Just waiting on some plugs to make the adapter cable.