question

macjl avatar image
macjl asked

KUS NKC42 NMEA2000 not shown

Hello,

I have a KUS NKC42 that monitor tanks (fuel, water, black water) on my boat. The data are shown on my NMEA Network, and I can see them in all my devices that understand PGN 127505.

But my VenusOS RPI doesn't show these data, although the KUS Device is listed in NMEA Device list.

I saw in Victron documentation that it should work. Am I wrong ?

tank monitorNMEA 2000 - N2K
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4 Answers
Martin (Victron Energy) avatar image
Martin (Victron Energy) answered ·

Hi @MacJL, support for the KUS NKC42 is now available per VenusOS v3.50~5. See here.

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macjl avatar image
macjl answered ·

In this article :

https://www.victronenergy.com/media/pg/Cerbo_GX/en/connecting-supported-non-victron-products.html#UUID-9f759229-3e91-5a02-891c-2206c9625753


I see :

A third-party NMEA 2000 tank sender must meet the following requirements to be visible on the GX device:

  • Transmit the NMEA 2000 Fluid Level PGN, 127505

  • The NMEA 2000 device class needs to either General (80) in combination with function code Transducer (190), or Sensor (170). Or, the NMEA 2000 device class needs to be Sensors (75), in combination with function Fluid Level (150).


The PGN sended by KUS NKC42 is 127505, so that's good on that point.

But I don't know how to check the class and the function code of this device. Is there a way to show it in VenusOS ?


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macjl avatar image
macjl answered ·

I think I found the class/function of this device :

img-0499.jpegIs it possible to modify VenusOS to allow NMEA class 45 / function 132 for tanks senders ?

In parallel, I will ask KUS to see if they can change it at their side, but I may not be possible without reflash it.

FYI, it’s the same device that Wema sell as « 4 channel analogue to digital signal converter »


img-0499.jpeg (120.4 KiB)
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macjl avatar image
macjl answered ·

Hello,

I confirm it works with last 3.5 Beta Firmware.

Thank you !

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Related Resources

GX Tank 140 product page

Connecting tank monitoring to Cerbo GX

Additional resources still need to be added for this topic