notify when new devices enters the network

notify_new_device_detected.yaml

blueprint:
  name: Notify new device on LAN/wifi
  domain: automation
  input:
    notify_device:
      name: Device to notify
      description: Device needs to run the official Home Assistant app to receive notifications.
      selector:
        device:
          integration: mobile_app

trigger:
  platform: event
  event_type: entity_registry_updated
  event_data:
    action: create
condition:
  - condition: template
    value_template: |
      {{trigger.event.data.entity_id.split('.')[0] == 'device_tracker' }}
action:
  - type: notify
    device_id: !input notify_device
    domain: mobile_app
    title: |
      Device detected: {{state_attr(trigger.event.data.entity_id,'friendly_name')}}
    message: |
      IP: {{state_attr(trigger.event.data.entity_id,'ip')}}
  - service: system_log.write
    data:
      message: >
        New device registrered:
        {{state_attr(trigger.event.data.entity_id,'friendly_name')}},
        {{state_attr(trigger.event.data.entity_id,'ip')}}
      level: warning
      logger: homeassistant.components.device_tracker
  - service: persistent_notification.create
    data:
      title: >
        New device registered:
        {{state_attr(trigger.event.data.entity_id,'friendly_name')}}
      message: >
        Entity: {{trigger.event.data.entity_id}}, Host:
        {{state_attr(trigger.event.data.entity_id,'host_name')}}, Ip:
        {{state_attr(trigger.event.data.entity_id,'ip')}}, Mac-address:
        {{state_attr(trigger.event.data.entity_id,'mac')}}, Full data:
        {{trigger.event.data}}
mode: single