question

confusion avatar image
confusion asked

Temperature sensor data logging with Cerbo - Possible?

Hi,


I have a Victron temperature sensor attached to the Cerbo, I can see it in VRM portal and I can see the temperature, however there is no history or graphs.


Do I have to set it to start logging? Is it possible?


Thank you

Temperature Sensorvrm logging
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1 Answer
matt1309 avatar image
matt1309 answered ·
hi @confusion


Have you tried the advanced tab? Normally history can be found in there.

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confusion avatar image confusion commented ·
Awesome, thanks mate I must've missed it.

Where would I set email alerts for high/low temperature values?


Extra points if you can tell me if/how I can feed that data in to Home Assistant.


Thanks again


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matt1309 avatar image matt1309 confusion commented ·

Also in VRM -> settings -> alarm rules Then select the temperature device.


Home assistant I'm not sure what the preferred option is for that community. (I use openhab).


I would've guessed they just read from victrons MQTT server details here:

GitHub - victronenergy/dbus-mqtt: Venus OS service mapping the D-Bus on Venus OS to MQTT

I also find this link useful to find out what the available topics are. The MQTT topics follow the same pattern as DBUS paths

dbus · victronenergy/venus Wiki · GitHub


For example it would be

/N/{VRMID}/temperature/{deviceID}/Temperature

where you replace {VRMID} with you vrm ID (can find in gx device's vrm settings)

and {deviceID} with the temps sensors ID.


However I've seen a lot of folk on here prefer modbusTCP to get data into homeassistant. You can find guide for that here:

GX Modbus-TCP Manual [Victron Energy]


As well as link to list of modbus registers in excel format here:

Technical information - Victron Energy


Happy to help further if you need a hand with anything


1 Like 1 ·
confusion avatar image confusion matt1309 commented ·
Legend. Really appreciate the info.

I like MQTT and have a broker for a bunch of other devices but I'll still look into modbusTCP, I guess they prefer it for a reason :)


Thanks again

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matt1309 avatar image matt1309 confusion commented ·
Yeh not sure if there is a reason for it or if I've just stumbled upon more queries about modbus. I wouldve leant more towards MQTT, more modern etc.
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Related Resources

Victron temperature sensor disambiguation table - which product supports which sensor


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