How can I trigger an automation when the weight on the scale changes?

I have a Xiaomi scale. As shown above, HA is only recording when the weight changes. When I weigh myself in the morning, it records that number all day, as if I’m standing on it 24/7.

I want to use “stepped on scale” to turn off my morning alarm. What I have so far looks like this:

repeat:
  sequence:
    - action: tts.cloud_say
      metadata: {}
      data:
        cache: false
        entity_id: media_player.lenovo_smart_clock
        message: Stand on Scale
    - delay:
        hours: 0
        minutes: 0
        seconds: 3
        milliseconds: 0
  until:
    - condition: state
      entity_id: sensor.mi_body_composition_scale_69c3_mass
      attribute: unit_of_measurement
      state: ""

The until part is a problem. What do I create to tell HA I want to note if a value has changed that day, not the actual measurement of the value?

if you use an entity state trigger and leave the “to:” part blank it will trigger on every change of the state:

triggers:
  - trigger: state
    entity_id: sensor.your_scale_entity
    to:

it’s explained in the docs: