Home Assistant Blueprint: Offline detection for Z2M devices with last_seen

offline-notification-for-sensors-with-last_seen.yaml

blueprint:
  name: Offline detection for Z2M devices with last_seen
  description: Regularly test all sensors with 'last_seen' in name and 'timestamp' device_class
    ('last seen' Z2M sensors) to detect offline and if so execute an action. Runs up to
    three times per day and only includes sensors labeled 'LastSeenCheck'.
  domain: automation
  input:
    hours:
      name: Hours not seen
      description: Sensors not seen this amount of time are assumed to be offline.
      default: 24
      selector:
        number:
          min: 1.0
          max: 168.0
          unit_of_measurement: h
          mode: slider
          step: 1.0
    time:
      name: Time to test (1)
      description: First time the test should run each day
      default: '10:00:00'
      selector:
        time: {}
    time2:
      name: Time to test (2)
      description: Second time the test should run each day
      default: '14:00:00'
      selector:
        time: {}
    time3:
      name: Time to test (3)
      description: Third time the test should run each day
      default: '20:00:00'
      selector:
        time: {}
    day:
      name: Weekday to test on
      description: 'Test is run at configured time(s) 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: "'last seen' sensors (from devices that you want to exclude) to
        exclude from detection. Only entities with 'last seen' in name and 'timestamp'
        in device_class are supported, devices must be expanded! Only entities with
        the 'LastSeenCheck' label are considered."
      default:
        entity_id: []
      selector:
        target:
          entity:
            domain: sensor
    actions:
      name: Actions
      description: Notifications or similar to be run. {{sensors}} is replaced with
        the names of sensors being offline.
      selector:
        action: {}
  source_url: https://gist.github.com/Mr-Groch/bf073b142b507e3b6f8154223f81803b
variables:
  day: !input 'day'
  hours: !input 'hours'
  exclude: !input 'exclude'
  sensors: "{% set result = namespace(sensors=[]) %}\
    \ {% set label_select = label_entities('LastSeenCheck') | list %}\
    \ {% for state in states.sensor | rejectattr('attributes.device_class', 'undefined') | selectattr('attributes.device_class', '==', 'timestamp') %}\
    \   {% if state.entity_id in label_select and 'last_seen' in state.entity_id and not state.entity_id in exclude.entity_id and (states(state.entity_id) == 'unavailable' or ((as_timestamp(now()) - as_timestamp(states(state.entity_id))) > ((hours | int) * 60 * 60))) %}\
    \     {% set result.sensors = result.sensors + [state.name | regex_replace(find=' last seen', replace='') ~ ' (' ~ relative_time(strptime(states(state.entity_id), '%Y-%m-%dT%H:%M:%S%z', 'unavailable')) ~ ')'] %}\
    \   {% endif %}\
    \ {% endfor %}\
    \ {{ result.sensors | join(', ') }}"
trigger:
  - platform: time
    at: !input 'time'
  - platform: time
    at: !input 'time2'
  - platform: time
    at: !input 'time3'
condition:
  - '{{ sensors != '''' and (day | int == 0 or day | int == now().isoweekday()) }}'
action:
  - choose: []
    default: !input 'actions'
mode: single