How to know if a device is down (vs offline) in Home Assistant?

[teranex]

I have NetAlertX setup with MQTT integration to Home Assistant. I'm looking for a way to know which devices are 'down'? I might be overlooking something, but as far as I can see the data which is provided to HA regarding online/offline state is only is_present (and is_home), which is not enough information to be able to make the distinction between offline and down devices?
I would like to make an overview in HA for my down devices, using the auto-entities card (https://github.com/thomasloven/lovelace-auto-entities), but without devices that are expected to be regularly offline (such as smartphones etc).

[jokob-sk]

Hi,

There will be a a new attribute in the next release that can help you filter devices that are marked as Alert Down

Hope this works

[teranex]

@jokob-sk that looks exactly like what I was looking for. Thanks a lot!

[jokob-sk]

Thanks for confirming!

[teranex]

I just upgraded to the latest version and integrated it in Home Assistant. Works nicely :)

I have added a Mushroom Chip which only appears when there is at least 1 device offline:

And also an overview card using auto-entities to show which devices are offline (could use some more formatting and tweaking but it does the job):

For anyone interested:
Code for the Mushroom Chip:

type: custom:mushroom-chips-card
chips:
  - type: conditional
    conditions:
      - condition: numeric_state
        entity: sensor.netalertx_down
        above: 0
    chip:
      type: template
      icon: mdi:network-off-outline
      icon_color: red
      content: "Network devices down: {{ states('sensor.netalertx_down') }}"
      entity: sensor.netalertx_down

Code for the overview of down devices:

type: custom:auto-entities
card:
  type: entities
  title: Offline network devices
filter:
  include:
    - and:
        - attributes:
            alert_down: "1"
        - state: not_home
  exclude: []

[jokob-sk]

Thank you for sharing this, these things, when stuff improves and works, make me smile 🙂