Trigger Automation if a value changes

Configuration
1

I’m looking to trigger an automation if an attributes value changes, trouble is I won’t know the ‘from’ or ‘to’ as its a time-date value.

For example, given the following payload from a ring doorbell last activity;

attribution: Data provided by Ring.com
created_at: '2020-05-05T16:19:14+00:00'
answered: false
recording_status: ready
category: motion
friendly_name: Front Door Last Activity
icon: 'mdi:history'
device_class: timestamp

I basically want to trigger when the created_at attribute changes. Any suggestions?

2

If you do a state triggered automation without a from and to it will trigger on all state object changes (including attributes)

If this causes too many triggers (ie if other attributes regularly change that you don’t wish to trigger on) you can use a template condition to filter it to the specific attribute you require.

3

Thanks for the reply. I did try that on a different attribute before realising that it never changed!