Home Assistant Blueprint: Last seen detection & notification for all sensors

last-seen-detection-notification-for-all-sensors.yaml

# Modified from sbyx/low-battery-level-detection-notification-for-all-battery-sensors.yaml
# https://gist.github.com/sbyx/1f6f434f0903b872b84c4302637d0890

blueprint:
  name: Last seen detection & notification for all sensors 
  description: Regularly test all sensors with 'last_seen' attribute for crossing
    a certain last seen threshold and if so execute an action.
  domain: automation
  input:
    threshold:
      name: Last seen threshold
      description: Sensors with 'las_seen' below threshold are assumed to be unavailable.
      default: 24
      selector:
        number:
          min: 0
          max: 168
          unit_of_measurement: hours
    time:
      name: Time to test on
      description: Test is run at configured time
      default: '10:00:00'
      selector:
        time: {}
    day:
      name: Weekday to test on
      description: 'Test is run at configured time either everyday (0) or on a given
        weekday (1: Monday ... 7: Sunday)'
      default: 0
      selector:
        number:
          min: 0.0
          max: 7.0
          mode: slider
          step: 1.0
    exclude:
      name: Excluded Sensors
      description: Sensors to exclude from detection. Only entities are supported, devices must be expanded!
      default: {entity_id: []}
      selector:
        target:
          entity:
            device_class: timestamp
    actions:
      name: Actions
      description: Notifications or similar to be run. {{sensors}} is replaced with
        the names of sensors being low on battery.
      selector:
        action: {}
  source_url: https://gist.github.com/sbyx/1f6f434f0903b872b84c4302637d0890
variables:
  day: !input 'day'
  threshold: !input 'threshold'
  exclude: !input 'exclude'
  sensors: >-
    {% set result = namespace(sensors=[]) %}
    {% for state in (expand(states.sensor, states.binary_sensor,  states.light, states.switch) | selectattr('entity_id', 'search', 'last_seen')) -%}
      {%- if (as_timestamp(now()) - as_timestamp(state.state) > (60 * 60 * threshold) ) and not state.entity_id in exclude.entity_id %} 
        {% set result.sensors = result.sensors + [(state.name | replace(" Last seen", "")) ~ ': ' ~ ((as_timestamp(now()) - as_timestamp(state.state)) / (24 * 60 * 60)) | round(0) ~ ' days ago'] %}
      {%- endif -%}
    {%- endfor %}
    {{result.sensors}}
trigger:
- platform: time
  at: !input 'time'
condition:
- '{{ sensors != '''' and (day | int == 0 or day | int == now().isoweekday()) }}'
action:
- choose: []
  default: !input 'actions'
mode: single