Controlling relays with Modbus and MQTT

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Ole Saether asked Mar 11, '19

Controlling relays with Modbus and MQTT

I have uploaded a few python scripts to control the relays on Venus GX and CCGX with Modbus and MQTT to github. Please check them out:
https://github.com/osaether/code-snippets/tree/master/victronenergy

CCGX Color Control Venus GX - VGX Relay

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Pat Davitt commented · Mar 11, 2019 at 10:18 PM

Think there is something wrong with the link. I click it and get a 404 error.

Pat

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Ole Saether Pat Davitt commented · Mar 11, 2019 at 10:20 PM

@Pat Davitt Sorry, I have edited the post. Try again now.

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Pat Davitt Ole Saether commented · Mar 11, 2019 at 10:27 PM

It works.

Thanks,

Pat

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Modifications Space

Node Red Space

Answer 1 · 2019-03-16T10:23:40Z

Paul B answered · Mar 16, 2019 at 10:23 AM

The link Works fine

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Answer 2 · 2021-01-12T19:30:43Z

haavard answered · Jan 12, 2021 at 07:30 PM

Hi! I have success using the MQTT to one of my installations, but not to my other! Is there any way to log what is happening or find out why it does not succeed?

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Ole Saether commented · Jan 12, 2021 at 07:48 PM

Hi,

Please note that the MQTT broker varies between installations. Victron used to have one broker but have split them into several servers to reduce the load on each server.
So instead of using

mqtt.victronenergy.com

you need to use an address similar to this:

mqtt67.victronenergy.com

See the last section on this page on how to calculate the correct address for your system:
https://github.com/victronenergy/dbus-mqtt

Also, make sure you have MQTT enabled on the Venus device :-)

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