ha_lovelace_autoentity_potentially_offline_mqtt_devices

readme.md

Based on

• How to transform each entity to apply custom params
  • thomasloven/lovelace-auto-entities#247
  • https://community.home-assistant.io/t/auto-entities-automatically-fill-cards-with-entities/147801/511?u=asnnetworks
  • Remember about escaping ({%- -%}) and returned object quotations
• How to append to list in Jinja2
  • https://community.home-assistant.io/t/solved-how-to-append-items-to-list-using-template/309899/2
  • namespace is necessary, otherwise the list is not updated (maybe the reference can't be changed?)

ha_lovelace_autoentity_potentially_offline_mqtt_devices.yaml

type: custom:auto-entities
filter:
  template: >-
    {%
      set offline_seconds = 12 * 60 * 60
    -%}
    
    {%
      set device_first_entity = integration_entities('mqtt')
        | map('device_id') 
        | reject('none')
        | unique
        | map('device_entities')
        | map('first')
        | list
    -%}
    
    {%
      set entities_with_lastseen = namespace(entities = [])
    -%}
    
    {%- for entity in device_first_entity -%}
      {%- if state_attr(entity, 'last_seen') is not none -%}
        {%- set entities_with_lastseen.entities = entities_with_lastseen.entities + [ entity ] -%}
      {%- endif -%}
    {%- endfor -%}
    
    {%-
      set possibly_offline = namespace(entities = [])
    -%}
    {%-
      set now_timestamp = as_timestamp(utcnow(), 0) | int
    -%}
    {%-
      set offline_timestamp = now_timestamp - offline_seconds
    -%}
    
    {%- for entity in entities_with_lastseen.entities -%}
      {%- set last_seen = as_timestamp(state_attr(entity, 'last_seen'), 0) | int -%}
    
      {%- if last_seen < offline_timestamp -%}
        {%- set possibly_offline.entities = possibly_offline.entities + [ entity ] -%}
      {%- endif -%}
    {%- endfor -%}
    
    {%- for entity in possibly_offline.entities -%}
      {{
        {
          'type': 'attribute',
          'entity': entity,
          'attribute': 'last_seen',
          'prefix': 'Last seen',
          'format': 'relative'
        }
      }},
    {%- endfor -%}
show_empty: true
card:
  type: entities
  title: Potentially offline MQTT devices (>12h)
sort:
  method: attribute
  attribute: last_seen