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bathnm asked

Node Red, Signal K and NMEA 2000 Devices

Just wondering if anyone has looked at how to get Node Red to send a message to a NMEA 2000 device. I am looking to install a yacht devices YSDC-04, and want to to switch the switches within Node Red flows.

Just asking if anyone has any pointers.

I am aware of the @signalk/node-red-embedded for when node-red is embedded in Signal

Venus OSNode-REDSignalK
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Hi @Bathnm,

I don't know of any way other than using the nodes from node-red-embedded within SignalK. Unfortunately their nodes are working only when embedded.


I've two YDCC-04 and switch them remotely using SignalK -> signalk-n2k-switching-plugin -> WilhelmSK

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bathnm avatar image bathnm Stefanie (Victron Energy Staff) ♦♦ commented ·

Looks like you an do it, but requires a fair amount of work.

watched this Youtube Video. Open a session to port 8375, then parse the msg payload for what is required. Not sure how to push data back to SignalK,

Wonder if we just load the Victron contrib into the embedded node red?

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ bathnm commented ·

Not really much work. But I use WilhelmSK for visualisation and control. This makes things a lot easier.

Have been following his channel on youtube for quite a while. Parsing msg.payload is the easy part, push into N2K is not because it's RAW data and needs to be converted.

Yes, installing @victronenergy/node-red-contrib-victron into SignalK Node-Red embedded should work.

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bathnm avatar image bathnm Stefanie (Victron Energy Staff) ♦♦ commented ·

Do you know if we can install the Victron components into the embedded node red. If so then we just do that and turn the main node red off...

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ bathnm commented ·

I could try, but currently I have wrecked my node-red installation from the large image. But I'm pretty sure that this will work.

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bathnm avatar image bathnm Stefanie (Victron Energy Staff) ♦♦ commented ·

I have node red embedded in SignalK with the Victron palette installed.

So it comes down to which node do you build flows in! Both could be a bit confusing.

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ bathnm commented ·

It depends on what you want.

For switching the YDCC-04 via node-red, you don't need the Victron nodes.

Provided that your n2k network is connected to signalk, n2k raw data is converted to signalk paths. Then use the signalk-input-handler node to read the state of the switching device channel, change the state with a change node and send it back to n2k with signals-send-nmea2000 node.

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bathnm avatar image bathnm Stefanie (Victron Energy Staff) ♦♦ commented ·

Do you have a further example of switching a data channel on the YDCC-04

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ bathnm commented ·

You mean from within node-red? No, sorry. As said earlier, I'm doing this via Signalk Server.

What exactly you are looking for?

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ bathnm commented ·

But you might run into a bit of trouble with the victron nodes. At least for the moment until the issue is fixed. I just got the same problem:

https://github.com/victronenergy/node-red-contrib-victron/issues/66

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mvader (Victron Energy) avatar image mvader (Victron Energy) ♦♦ Stefanie (Victron Energy Staff) ♦♦ commented ·

Hey @Stefanie, that issue was fixed by sbender in v1.4.0 or v1.4.1 - so I'm not sure how you can run into that.

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ mvader (Victron Energy) ♦♦ commented ·

Yes I know, Matthijs.

NPM is showing 1.4.1, but when installing the nodes into a SignalK installation without Venus, they show up as 1.3.2.

I don't know how to check node-red-contrib-victron version, but I'm pretty sure they install as 1.3.2. At least that's what the screenshots and duplicate nodes message suggest.

I

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bathnm avatar image bathnm mvader (Victron Energy) ♦♦ commented ·

@mvader (Victron Energy) Unfortunately when you search in the palette for nodes, it is only giving you the option to install 1.3.2.

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