Temperature Drop Sensor

[Troon]

Delayed or earlier sensor value

You could create something like this: template: - trigger: - platform: time_pattern minutes: "/1" sensor: - name: bathroom temperature history state: "{{ states('sensor.bathroom_temperature') }}" attributes: min0: "{{ states('sensor.bathroom_temperature')|float(0) }}" min1: "{{ this.attributes['min0'] }}" min2: "{{ this.attributes['min1'] }}" min3: "{{ this.attributes['min2'] }}" min4: "{{ this.attribute…

Then:

template:
  - binary_sensor:
      - name: water heater temp drop
        state: >
          {{ state_attr('sensor.water_temp_history', 'min10') -
             states('sensor.water_temp_history')|float(0) > 10 }}