Counts the lights on

Configuration
63

Just to share how I did it.

image

To explain a bit:

  • My second floor is organized in 4 areas.
  • I have renamed all lights that are part of another light to something like “2nd Floor xyz”. These are for instance IKEA bulbs in a lamp with 3 bulbs. I have organized this using light groups into one light.
  • I use custom button cards for the buttons. Check out https://github.com/custom-cards/button-card.
  - platform: template
    sensors:
      lights_number_on_in_2nd_floor:
        friendly_name: 'Lights on in 2nd floor'
        unique_id: lights_number_on_in_2nd_floor
        value_template: > 
          {%- set search_state = 'on' %}
          {%- set search_areas = ['Office', 'Loft', 'Bedroom', 'Master bedroom'] %}
          {%- set ns = namespace(lights=[]) %}
          {%- for light in states.light | selectattr('state','eq', search_state) %}
            {%- for area in search_areas %}
              {% if area_name(light.entity_id) == area and "2nd Floor" not in state_attr(light.entity_id, "friendly_name") %}
                {%- set ns.lights = ns.lights + [ light.entity_id ] %}
              {% endif%}
              {%- endfor %}
          {%- endfor %}
          {{ ns.lights| list | length }}

Edit: Thanks to @petro and everyone else for the help in the thread.

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