How do I receive MQTT sensor in raw format?

Installation Home Assistant OS
1

I would like to receive MQTT sensor data in raw format and not json format. Is it possible? How do I do then?
I read the MQTT Sensor documentation and I assume that I should set the value_template option to something clever but I do not get it.

In MQTT Explorer I see the following:
mqtt

which I would like to catch as a sensor configured like this today (does not work though):

  - platform: mqtt
    name: "Sovrum"
    state_topic: "Byvallen/sovrum_temp"
    unit_of_measurement: '°C'
    device_class: "temperature"
    icon: mdi:home-thermometer
    force_update: true

I assume I need to add the value_template but I don’t know how.

Someone who has any idea?

2

Try this:

value_template: "{{ value }}"
3

Thanks a lot! It solved my problem.