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yuharla avatar image
yuharla asked

Switch On/Off Multiplus with MQTT and Venus Gx

hello everybody,

I have actually an multiplus 12/1600/70-16 plug to my Venus GX.

I want to switch ON/OFF the multiplus thank a request MQTT.

Actually i read all data from MQTT. but i don't find information to switch on/off the multiplus with a MQTT command line.

Somebody can help me?

Multiplus-IIVenus GX - VGXMQTT
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gone-sailing avatar image
gone-sailing answered ·

I've done this. The topic is W/<portal ID>/vebus/257/Mode to set the state. There are 4 states that you set with a json object with value an attribute e.g. {"value":1}, 1=Charger Only;2=Inverter Only;3=On;4=Off. To read the current state you need to subscribe to N/<portal ID>/vebus/257/Mode and then send a read request by posting an empty message to topic R/<portal ID>/vebus/257/Mode.

Update:
Anybody reading this should familiarise themselves with Victron's dbus-mqtt gateway by reading this: https://github.com/victronenergy/dbus-mqtt

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lasho avatar image lasho commented ·
Hi @gone-sailing , On my side I have managed to get this working from my laptop. But it seems when using this via an MQTT Client on my android phone, it doesn't seem to update the value accordingly. From "On" to "Charger Only" (Value 1), it doesn't seem to update.


Strange enough, I can subscribe to a topic and read the value easily from the same android phone. I am wondering what am i missing. Would you perhaps know?


Thanks

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gone-sailing avatar image gone-sailing lasho commented ·
There is no logical reason why the Mqtt broker on the GX device would treat your android device any different to your laptop. It’s more like a programming error. Are you sure you used the correct topic and payload?
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lasho avatar image lasho gone-sailing commented ·

Hi @gone-sailing , thanks for the response.


I have attached screenshots of my writes/published code.

My request looks something like this:

topic: W/<portal_id>/vebus/276/Mode

Publish: W/<portal_id>/vebus/276/Mode' -m '{"value":1}'

I have tried with "R" and with "N" as a topic. Not really sure if that makes a difference, don't understand it too well. From Windows (gitbash), my mosquitto_pub.exe command is as follows:

./mosquitto_pub.exe -t 'W/<portal_id>/vebus/276/Mode' -m '{"value":1}' -h mqtt73.victronenergy.com -u USER -P PASSWORD--cafile "<PATH_TO_CA_FILE>" -p 8883

I'm not sure what is the payload you mentioned, could this be perhaps what I'm missing?

Any help is appreciated.

MSG_OK.jpgPUBLISH_VALUE_1.jpgVALUE_AFTER.jpgWRITE_DETAILS.jpg

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anhoume answered ·

Have you tried to encapsulate the value in double quotes? Like this: '{"value":"1"}'

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lasho avatar image lasho commented ·
Hi @andre.holgersson@callisto.nu ,


Thanks for the response. Yes, tried adding double quotes as well as played around with the spacing and double quotes. Still doesn't seem to accept the updated value.
Am I supposed to receive a JSON response after the update to confirm the value is changed or does an update return no response?

Thanks again.

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