how to use mqtt with node red ?

Hello,

I can't communicate with the multiplus via mqtt and node-red

RPI 192.168.1.2 mqtt broker and node red module 'victron energy' installed,
error message : unable to acces the service endpoint : I do not understand why

do i need to set up something else?

Multiplus 2 GX with root, 192.168.1.5, mqtt and dbus enabled,

I added this configuration on the GX:

/etc/dbus-1/system.conf 
<listen>tcp:host=0.0.0.0,port=78</listen>
  <auth>ANONYMOUS</auth>
  <allow_anonymous/>

I think I forgot a step, however I don't see which one

I tried to follow the documentation on github :
https://github.com/victronenergy/node-red-contrib-victron

Thanks for those who can help me, sorry for my english

I am French

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