Ancestors

Written by warthog9 on 2024-12-03 at 05:32

When you can mash / plead / beat the templating engine into doing what you want in #HomeAssistant it is incredibly powerful.

Good freaking grief it took far too much effort to make an average of a dynamic set of sensors (Air Quality sensors inside my house).

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Written by David Sullivan on 2024-12-03 at 05:44

@warthog9 I recently struggled with this as well, trying to create a sensor that was an average of all temperature sensors. Here's what I came up with: https://gist.github.com/tkroo/dcf9822052fd4900c14fae4712e382f4

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Written by warthog9 on 2024-12-03 at 16:43

@tkroo Interesting, you might have a couple of things I can steal to simplify mine but let me paste what I've got here, in all it's extra debug glory

customize:

sensor.aqi_pm25_indoor:

  aqi_sum:

  aqi_count:

template:

• sensor:

- name: "Indoor AQI (pm2.5)"

  unique_id: sensor.aqi_pm25_indoor

  state: >

      {% set ignored_aqi_entities = state_attr('group.ignored_aqi_entities', 'entity_id') %}

      {% set entities_aqi_list = states

          | rejectattr('state','in',['unknown','unavailable'])                                                                                                                                                                                                                                    | rejectattr('entity_id','search','device_tracker')

          | rejectattr('entity_id','search','wimp')

          | rejectattr('entity_id','search','sensor.aqi.pm25.indoor')

          | rejectattr('entity_id','search','sensor.aqi_pm25_indoor')

          | rejectattr('entity_id','search','rx')

          | rejectattr('entity_id','search','tx')

          | selectattr('entity_id', 'search', 'aqi')

      %}

      {% set entities_aqi_list =  entities_aqi_list

          | rejectattr('entity_id', 'in', ignored_aqi_entities)

            if ignored != none

            else entities_aqi_list %}

      {% set ns = namespace( aqi_count = 0, aqi_total = 0 ) %}

      {% for entity in entities_aqi_list | map(attribute='entity_id') %}

      {%    set ns.aqi_total = ( states(entity) | float ) + ns.aqi_total %}

      {%    set ns.aqi_count = ns.aqi_count + 1 %}

      {% endfor %}

      {{ ( ns.aqi_total / ns.aqi_count ) | round(0) }}

  attributes:

  unit_of_measurement: AQI

  device_class: aqi

[#] OPTIONAL - Add entities you want to ignore to this group. Delete if not using group.

group:

ignored_aqi_entities:

entities:

  - sensor.calculated_aqi_5 # outside sensor

  - sensor.indoor_aqi_pm2_5

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Toot

Written by David Sullivan on 2024-12-03 at 17:05

@warthog9 Thanks for sharing. I like the how you set up an ignore group. I'll be stealing that :) Also, I see that your reject filters are before selects and that made me wonder if the order is important when the yaml/jinja is interpreted. It seems likely more efficient to put reject conditions at the start. So I think I'll adopt that as well. Cheers.

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