Customizable scan interval/update frequency?

@dooz127 wrote:

There are some integrations I’m only interested in updating while I’m actually accessing hass from the web or the mobile app. Is this something I can do within the hass automation framework or is it only possible via a python script, appdaemon, custom integration, etc.?

I was thinking something along the lines of:

automations.yaml

- id: <automation_id>
  alias: Update entity when a user is connected to the front end
  trigger:
  - platform: numeric_state
    entity_id: sensor.websocket_api
    above: 0
  - platform: time_pattern
    minutes: 1 
  condition:         
    platform: template
    value_template: '{{ states('sensor.websocket_api') > 0 }}'
  action:
    service: homeassistant.update_entity
    data:
      entity_id: sensor.pi_hole_ads_blocked_today
      entity_id: sensor.allergy_index_forecasted_average
      entity_id: sensor.u_s_air_pollution_level

Then, I would have to configure the above sensors with a really long scan interval:

configuration.yaml

pi_hole:
  host: !secret pi_hole_ip_address
  scan_interval: 86400

iqvia:
  zip: !secret zip_code
  monitored_conditions:
  - allergy_index_forecasted_average
  scan_interval: 86400

sensor:
- platform: air_visual
  api_key: !secret air_visual_api_key
  scan_interval: 86400

Has anyone tried something similar? Or is this even a good idea? I’m mostly interested in doing this to reduce hass server load but this might be more useful for rate limited platforms/apis like google ones that might cost you money if you exceed their quotas or to limit data usage if you’ve got a limited mobile data plan.

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