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.
  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 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: "'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!"
      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=[]) %}\
    \ {% for state in states.sensor | rejectattr('attributes.device_class', 'undefined') | selectattr('attributes.device_class', '==', 'timestamp') %}\
    \   {% if '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'
condition:
- '{{ sensors != '''' and (day | int == 0 or day | int == now().isoweekday()) }}'
action:
- choose: []
  default: !input 'actions'
mode: single

I have HA supervised + Z2M, but I don't see last_seen in the attributes. My sensors in HA have these attributes only (examlpe):
state_class: measurement unit_of_measurement: °C device_class: temperature friendly_name: Датчик на улице Температура
But in the Z2M, I see an attribute last_seen, so for the sensor from the example, I see this:
{ "humidity": 86, "last_seen": "2024-02-22T12:38:26+03:00", "linkquality": 29, "temperature": -0.2 }
How do I transfer the last_seen attribute from Z2M to HA to use this blueprint? It's not working right now.

Sorry, I figured it out myself. I've added objects that are deactivated by default. Now I see it in HA. Thanks.

Hi @Mr-Groch , thanks for the blueprint. Is it possible somehow not only to exlude etitities by defining the entities itself, but also by device, room or even label ?

I tried to filter out by label, but it still reports all of the entities here.

Reason for the exlude filter by label, would be the option to reuse the blueprint for multiple time for different devices with different actions...