How to automatically include and sum the values of multiple Utility Meter Sensors

[petro]

@craigy

I want to set it up, so when I add a new device, it is automatically identified by name and then added to the usage total without having to manually add each new daily sensor to the list.

That’s not possible with template sensors.

Template sensors require entity_id’s to listen to. If you use dynamic entity_ids, the system doesn’t know when to create a ‘listener’, so you end up with no listeners.

You’ll always need to manually add an item to the template sensor.

But you could add sensor.time to the template sensor and it will update once a minute.

That would look like this:

sensor:
- platform: date_time
  display_options:
  - 'time'

- platform: template
  sensors:
    total_daily_energy:
      friendly_name: Total Daily Energy
      entity_id: sensor.time
      value_template: >
        {% set ns = namespace(states=[]) %}
        {% for s in states.sensor %}
          {% if s.object_id.startswith('daily_') and s.object_id.endswith('_energy') %}
            {% set ns.states = ns.states + [ s.state | float ] %}
          {% endif %}
        {% endfor %}
        {{ ns.states | sum }}