Sensor template not showing any value

Configuration
,
1

Hi all,

I tried to create a template sensor (Heating setpoint) which is 10 C higher than the outside temperature, but at least 5 and maximum 10 C.

for this i added below to my configuration.yaml

- platform: template
  sensors:
    heating_setpoint:
      friendly_name: "heating setpoint"
      unit_of_measurement: "°C"
      unique_id: fasdfsadrrjfffsdajmggnr231
      value_template: >
        {% set heating_setpoint = states('sensor.st_00137716_temperature') | float(none) %}

        {% if heating_setpoint is none %}
          {{ 5 }}  # Default to 5 if sensor is unavailable
        {% else %}
          {% set temp = heating_setpoint + 10 %}
          {% set clamped_temp = [5, temp, 10] | sort | slice(1,1) | first %}
          {{ clamped_temp }}
        {% endif %}

altough the sensor is created after restarting home assistant, it does not show any value.
what mistake did i make?
thanks in advance for any advise…

2

My guess would be the comment. You cannot insert a YAML comment into a Jinja template. Jinja template syntax is to bracket the comment between {# and #}.

1 Like
3

That’s not how you do comments in Jinja and your slicing method won’t return a single numeric value, which is required if you set a unit_of_measurement.

{% set heating_setpoint = states('sensor.st_00137716_temperature') | float(none) %}

{% if heating_setpoint is none %}
  5  {# Default to 5 if sensor is unavailable #}
{% else %}
  {% set temp = heating_setpoint + 10 %}
  {% set clamped_temp = ([5, temp, 10] | sort)[1] %}
  {{ clamped_temp }}
{% endif %}
1 Like
4

Also you should not be using the legacy template sensor platform for new sensors. It will keep working but will not be getting new features.

New format (and some simplifications):

configuration.yaml

 template:
   - sensor:
       - name: "Heating Setpoint"
         unit_of_measurement: "°C"
         unique_id: fasdfsadrrjfffsdajmggnr231
         state: >
           {% set heating_setpoint = states('sensor.st_00137716_temperature') | float(-9) %}
           {% set temp = heating_setpoint + 10 %}
           {{ ([5, temp, 10] | sort)[1] }}
1 Like