Template to add values of all sensors with certain name ending

Configuration
21

Next you’re going to need a way to run this script (let’s call it python_script.update_total_sensors for this example.) I think something like this should work for you:

- alias: Update sensor.total_sensors
  trigger:
    platform: event
    event_type: state_changed
    event_data:
      new_state:
        domain: sensor
  condition:
    condition: template
    value_template: "{{ trigger.event.data.entity_id.endswith('actueel') }}"
  action:
    service: python_script.update_total_sensors

EDIT: Added further filtering to only run the script if the domain is sensor. Not 100% sure this will work. If not, then the domain filtering can definitely be done in the template condition.