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Expected traffic to the mqtt{1 to 128} server farm?

I am running Venus-large and have a fairly extensive Node-Red flow consisting of about 100 nodes. My router is reporting a permanent TCP/IP session with one of the mqtt{1 to 128} servers with constant traffic of just over 10 kbit/s upload and just under 1 kbit/s download. This seems high to me but maybe it's because of my 100-node flow. Is this level of traffic to be expected?

paulcooper asked
paulcooper answered ·

1 Answer

Controlling an openEVSE electric vehicle charger using Node-Red and MQTT

This is not so much a question but more of offering what I have created to others in the community. I have been using the Node-Red add-on in Venus OS v2.70~5-large-18 to control my openEVSE car charger via MQTT. It maximises the available power from the PV array to charge the car. When there isn't enough power it will use what is stored in my BYD batteries and when they're depleted it uses the mains. It is now stable enough that I have placed the json file and a brief explanation on GitHub (

Disclaimer: I am not an expert in JavaScript or Node-Red so I am sure there are more effective ways of coding what I have created. But it works and I am now charging my car from the sun.

paulcooper asked

0 Answers

Control MultiPlus II via MQTT

Would it be possible to control a MultiPlus II via MQTT ?

What I'm thinking is to disconnect the mains in relay off between 16:00 - 19:00 this would be because on the Octopus Agile tariff here in the UK is the very expensive period. During this period my house would run from batteries via the inverter in the MultiPlus II. The control would come from Node-red.

myozone asked
homestorage-77 commented ·

6 Answers

mqtt Energy Meter for 600/5 CT

Can any one advise if there is a Energy Meter available that accepts the 5A secondary for larger CT ratios 600/5 that could publish real time kw out every 1 or 2 seconds in the form of an mqtt publish.

I would like to read this value into a Venus running Node Red which is 100m away from the Energy Meter.

markus-001 asked

0 Answers

how to use mqtt with node red ?


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

RPI 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,, mqtt and dbus enabled,

I added this configuration on the GX:


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

I tried to follow the documentation on github :

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

I am French

ashemta asked
ashemta edited ·

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