Kovah

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.