Send notifcation of IP + hostname when a new device is added

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1

So I wanted to share something I couldn’t find fully completed, and is a pretty cool feature I’ve been wanting myself: whenever I connect a new device to the network (e.g. smart wifi device, rpi, etc) I receive a notification on the HA companion app.
Previously I had to log in to the router or HA to see the device’s IP, thats sooo 2020.

An added bonus is the added feeling of security of getting a notification when a new device connects.
(improvement would be to add actionable notifications with block/allow option)

This automation notifies on new device_tracker entries in the registry and sends a notification when its a creation. In my situation, my device_trackers are added via MIkrotik Router integration and the attributes ip and host_name are automatically added. I can imagine other router integrations can also do this. YMMV

alias: Send notification of new network device
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:
  - service: notify.mobile_app_sm_g973f
    data:
      title: >-
        devie added to network:
        {{state_attr(trigger.event.data.entity_id,"host_name")}}
      message: >-
        Host [{{state_attr(trigger.event.data.entity_id,"host_name")}}] with IP
        [{{state_attr(trigger.event.data.entity_id,"ip")}}] was added to the network
initial_state: true
mode: parallel
6 Likes
2

Thanks for sharing this! The script does alert me when a new device is connected to my Asus router, however the message isn’t clear as to what device it was. Here is the output I received:

device added to network: None
Host [None] with IP [None] was added to the network

Any idea of where I might start to trouble shoot this to get the correct Device name and IP?

3

Do you see the hostname and ip in the dev options, afterwards?

Sometimes it takes another update event to get the extra info on the device registered in my case

4

Is there anyway to still do this? My understanding is the entity_registry_updated event is no longer fired for new device_trackers.

5

Mine still works i think? Last one couple of weeks ago

6

Confirmed it still works, had a guest haha

7

Hi,

It works but I see all info as none when a device is added.