Display Negative calculated Sensor Values

Configuration
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1

Hi! Im new to HA and not very good in Coding. I wanted to make a calculation when i can open the Window to fill with Cooler air

Whats available
Temperature Indoor (example 10°C)
Temperature Outdoor (example 20°C)

  - sensor:
      - name: Tempdifference
        unit_of_measurement: "°C"
        state: >
          {% set indoor = states('sensor.netatmo__weather_station_temperature') | float %}
          {% set outdoor = states('sensor.netatmo__weather_station_outdoor_module_temperature') | float %}

          {{ ((indoor - outdoor)) }}

Calculation 10-20 = **-**10 but it shows me allways 10. Is there a workaround to archive that the - gets also out?

Thanks for your Help!

2

there’s nothing special with negative signs. Are you sure the values are what you think they are? Secondly, you don’t need all those (( )) around the subtraction.

{{ indoor - outdoor }}