Get "age" of current state of the sensor

ESPHome
1

Hi!

I have been looking for attribute for ESPHome sensor which would give me e.g. in milliseconds the time how long sensor has been in current state.

Goal which I am trying to would be like this:

script:
  - id: test
    then:
      - if:
          condition:
            for:
              time: 10min
              condition:
                binary_sensor.is_on: my_sensor
          then:
            - logger.log: "Sensor has been on for 10 minutes now"
          else:
            - logger.log
                format: "Sensor is now in state %.1 and has been for %.1f minutes"
                args: [ 'id(my_sensor).state', 'id(my_sensor).current_state_age' ]

And the attribute / thing which i am looking for is that id(my_sensor).current_state_age or similar.

Does anyone know how this could be achieved?