Publish measured Voltage over MQTT

[tschaeffer2]

Hello,
The WiCAN is a great tool. Thanks a lot!
There is one feature missing: The voltage measured by the device itself should be published as an MQTT message.
Best regards,
Tobias

[meatpiHQ]

You can request the battery voltage by sending {"cmd": "get_vbatt"} to topic wican/{device_id}/cmd

[tschaeffer2]

Thanks a lot for the fast answer. I will try that out. Is there a reason why the information is not send cyclic as other common MQTT devices like TASMOTA, Shelly and ESPeasy are handling that?
And are there more internal commands (e.g. go to sleep mode, get status and get settings)?

[meatpiHQ]

@tschaeffer2 @njh I'll probably add the battery voltage publish in the next release. And I'll also make it available directly as a sensor in the HA integration.

The only other command available now is reboot.

[njh]

That would be great, thank you!

[njh]

I would love to have the battery voltage published periodically (along with CAN data), while connected to my home Wifi.
I can probably get Node-RED to send that command, when it sees WiCAN online but would be much easier if there was an option I could turn on.

[micha53]

I have a problem with the 12vBat data description with Zoe Ph2.
In Home assistant I get an error Msg

state_topic: wican/7c2c67b3dbc1/auto
name: Zoe 12V-Batteriespannung
unit_of_measurement: V
value_template: '{{ value_json.12vBat}}'

Fehler: invalid template (TemplateSyntaxError: expected token 'end of print 
statement', got 'vBat') for dictionary value @ data['value_template'].

many other data is handled in the same way and is ok. Does anybody know, why I get this error msg? Maybe the 12vBat name is not allowed to begin with a number??