Can I set the status of a template sensor

Configuration
,
1

Is it somehow possible to set the status of a template sensor, let’s say a binary sensor from an automation?
And if so, can I also set an attribute? Here is an example:

- binary_sensor:
  - platform: template
    sensors:
      testsensor:
        friendly_name: "Test Sensor"
        value_template: >
            {{ states("binary_sensor.something") == 'on' }}
        attributes:
            testvalue: "01987431"
            version: "1.0"

Would result in a binary sensor named testsensor with a value true when binary_sensor.something has the value ‘on’
It also has some attributes: testvalue and version. Now I want to call a service that sets another value to this sensor. Also I want to be able to maiplulate the attribute value… Can this be done without custom components?

2

Yes, you can switch to a trigger-based template sensor that has multiple triggers. A State trigger will get you similar function to the state-based template sensor. Then add a second trigger to override the value. I would probably go with an Event trigger since they don’t require any extra entities and can be customized by type and event data content.

3

Could you perhaps give an example for that?

4 
template:
  - trigger:
      - platform: state
        entity_id: binary_sensor.something
        to:
          - 'on'
          - 'off'
      - platform: event
        event_type: custom_test_sensor_manual_set
    binary_sensor:
      - platform: template
          - name: "Test Sensor"
            state: |-
              {% set current = this.state|default('off', 1)%}
              {% if trigger.platform == 'state' or trigger.event.data.state is not defined %}
              {{ is_state('binary_sensor.something', 'on') }}
              {% else %}
                {{ trigger.event.data.state }}
              {% endif %}
            attributes:
              testvalue: |-
                {% set current = this.attributes.testvalue | default(0, 1)%}
                {% if trigger.platform == 'state' or trigger.event.data.testvalue is not defined %}
                  {{ current }}
                {% else %}
                  {{ trigger.event.data.testvalue }}
                {% endif %}
              version: "2.0"

HA Docs: Raise and Consume Custom Events

5

Thanx a lot!