How can I get alerted when any sensor state changes

Configuration
1

I’m trying to keep an eye on when people move into and out of range of my BLE and BT scanners, and I’d like to trigger a notify when the state of any of the “device_tracker” entries change.

Can anyone tell me what I need to do? Thanks!

1 Like
2

I believe you want https://home-assistant.io/docs/configuration/events/#event-state_changed Do post any progress since I mean to test this soon myself :slight_smile:

3

This is what I use to send me messages when the IOS app updates my location… It might get you started.

- alias: Notify iOS moving
  trigger:
    platform: state
    entity_id: device_tracker.ryans_iphone_app
  action:
    service: notify.ios_ryans_iphone_app
    data_template:
      message: >
        {{trigger.from_state}}
        {{trigger.to_state}}
1 Like
4

or publish to mqtt, then use a mqtt client on your phone

5

I would have thought the most explicit way to do this would be:

  trigger:
    platform: event
    entity_id: device_tracker.ryans_iphone_app
    event_type: state_changed 
  action:
    service: notify.ios_ryans_iphone_app
    data_template:
      message: >
        {{state.ios_ryans_iphone_app.state.from_state}}
        {{state.ios_ryans_iphone_app.state.to_state}}

Although the docs state ‘any state change will be announced on the event bus as a state_changed event containing the previous and the new state of an entity’ so the @rabittn approach works. If anyone can comment of the relative merits of the two approaches I would be grateful :slight_smile:

6

Wouldn’t the Alert component cover this?
I haven’t used alert to verify but believe this is use case.