Automatic on/off of Multiplus II via command line

Modifications
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1

Hi everyone,
I need to be able to turn the Multiplus on and off via Cerbo GX’s command line.
I tried to follow the steps documented here: https://www.victronenergy.com/live/open_source:ccgx:commandline?do=export_pdf&rev=1615037933
and especially point 4.4
They say, to switch off a device, one can use:
vreg -c socketcan:can0 -s 0x0200 un32:0x000004 -n 0x24

Ok, I execute it (but with 0x04 as my firmware is newer than this from the document) and the command is accepted. The changes in register 0x0200 are saved and I can see they are changed. But nothing happens to the state of the inverter - it remains On and vice versa - if I write 2 or 3 in an off state - it does not power on.

Am I missing something? Shall I be doing anything else beside changing the values in the register?

2

The multi is vebus, not CAN. You can write to, via the GX, the relevant modbus register which will toggle the software switch for the inverter.
For MQTT this is
N/cxxxxxxxxxx/vebus/276/Mode
(where 276 is the device ID of the multi)

3

Thank you Nick!
I also suspected that this “can0” might not work with inverters, but I could not find any other example in Victron docs.
Would you please help me a little bit further by telling me how should I change the structure of the vreg command, to include the parameters you have given “N/cxxxxxxxxxx/vebus/276/Mode” ?
And what should be the “scan/read” commad, to find my Multi’s ID?
If I can read more about these commands with more examples (beside the given document above) would be also great.

I highly appreciate your help!

4

If you want to run this from the GX have a look at nodered and the venus large image. Super simple.

5

Okay. So I can’t alter the Multi’s registers without first upgrading the OS to Venus Large, have I got it right?

6

Isn’t a dbus path available for the Multi’s /Mode variable?
Use the dbus utility for turning the Multi on and off.

See:

and

1 Like
7

There are different ways to go about it, if you only need a cli then there are utils for that. The large image is just more powerful imo and gives better options, depends what you are trying to do.