How and where to define a certain value template for a certain sensor

[Connor0308]

Dear,

after having tweaked my configuration back and forth, it seems that I now have quite a good starting point for my project.
However, one thing that still worries me is a simple value template correction.

Using this configuration line

r;w,,OffsetOutsideTemp,,,,,2D00,,,D2C,,K,Offset outside temperature (used to determined DisplayedOutsideTemp)

I wanted to make the offset for the temperature sensor writable.
This is how the the sensor is appearing in the MQTT explorer.

{
  "unique_id":"ebusd_ctlv2_OffsetOutsideTemp_0",
  "name":"OffsetOutsideTemp ",
  "device":{
   "identifiers":"ebusd_ctlv2",
   "manufacturer":"ebusd.eu",
   "name":"ebusd ctlv2",
   "via_device":"ebusd",
   "sw_version":"23.2",
   "suggested_area":"Heizung"
  },
  "value_template":"{{value_json[\"0\"].value}}",
  "state_topic":"ebusd/ctlv2/OffsetOutsideTemp",
  "command_topic":"ebusd/ctlv2/OffsetOutsideTemp/set",
  "min":-2047.94,
  "max":2047.94,
  "step":0.06,
  "unit_of_measurement":"K",
  "device_class":"temperature"
 }

While I can generally live with the strange min and max values, the a step of 0.06 is not favorable.
How can I fix this permanently - and not updating it with every restart?

Thank you!
Regards

Connor

[Connor0308]

For anyone getting here (including a future me) - a possible workaround is to send the configuration
to the topic followed by /config and to retain the message.

The above mentioned configuration would look like

{
  "unique_id":"ebusd_ctlv2_OffsetOutsideTemp_0",
  "name":"OffsetOutsideTemp ",
  "device":{
   "identifiers":"ebusd_ctlv2",
   "manufacturer":"ebusd.eu",
   "name":"ebusd ctlv2",
   "via_device":"ebusd",
   "sw_version":"23.2",
   "suggested_area":"Heizung"
  },
  "value_template":"{{value_json[\"0\"].value}}",
  "state_topic":"ebusd/ctlv2/OffsetOutsideTemp",
  "command_topic":"ebusd/ctlv2/OffsetOutsideTemp/set",
  "min":-20,
  "max":20,
  "step":0.5,
  "unit_of_measurement":"K",
  "device_class":"temperature"
 }