Home Assistant Blueprint: Notify or do something when an appliance like a dishwasher or washing machine start or finishes

appliance-has-started-or-finished-with-variables.yaml

blueprint:
  name: Appliance has started/finished (with duration + energy)
  description: |
    # Appliance has started/finished (with duration + energy)

    Do something when an appliance (like a washing machine or dishwasher) has started/finished as detected by a power sensor.

    You can use some parameters in the actions:
     - {{ duration_str }} (es. 1:45 o 1:11:12)
     - {{ duration_s }}
     - {{ energy_used }} (same unity of measure of energy sensor)
     - {{ energy_uom }} (es. kWh, Wh)
     - {{ energy_used_wh }} (Wh, if calcolable)

    ℹ️ Version 2025.12.17
  domain: automation
  input:
    power_sensor:
      name: (Required) Power Sensor
      description: Power sensor entity (W).
      selector:
        entity:
          domain: sensor

    energy_sensor:
      name: (Required) Energy Sensor (cumulative)
      description: >
        Optional but required if you want energy_used. Use a cumulative energy sensor
        (e.g. kWh total/today). Must monotonically increase during a cycle.
      selector:
        entity:
          domain: sensor

    starting_threshold:
      name: (Required) Starting power threshold
      default: 5
      selector:
        number:
          min: 1.0
          max: 100.0
          unit_of_measurement: W
          mode: slider
          step: 1.0

    starting_hysteresis:
      name: (Required) Starting hysteresis
      default: 5
      selector:
        number:
          min: 0.25
          max: 60.0
          unit_of_measurement: min
          mode: slider
          step: 0.25

    finishing_threshold:
      name: (Required) Finishing power threshold
      default: 5
      selector:
        number:
          min: 1.0
          max: 100.0
          unit_of_measurement: W
          mode: slider
          step: 1.0

    finishing_hysteresis:
      name: (Required) Finishing hysteresis
      default: 5
      selector:
        number:
          min: 0.25
          max: 60.0
          unit_of_measurement: min
          mode: slider
          step: 0.25

    pre_actions:
      name: Actions when started
      description: Actions when starting threshold is crossed
      default: []
      selector:
        action: {}

    actions:
      name: Actions when finished
      description: Actions when finishing threshold is crossed
      default: []
      selector:
        action: {}

trigger:
  - platform: numeric_state
    entity_id: !input power_sensor
    for:
      minutes: !input starting_hysteresis
    above: !input starting_threshold

condition: []

action:
  # Capture "start" snapshot
  - variables:
      start_ts: "{{ now().timestamp() | float }}"
      energy_entity: !input energy_sensor
      energy_uom: "{{ state_attr(energy_entity, 'unit_of_measurement') if energy_entity else none }}"
      energy_start: "{{ states(energy_entity) | float(0) if energy_entity else none }}"

  # User pre-actions (can use start_ts / energy_start)
  - choose: []
    default: !input pre_actions

  # Wait for "finished"
  - wait_for_trigger:
      - platform: numeric_state
        entity_id: !input power_sensor
        below: !input finishing_threshold
        for:
          minutes: !input finishing_hysteresis

  # Capture "end" snapshot + computed deltas
  - variables:
      end_ts: "{{ now().timestamp() | float }}"
      duration_s: "{{ (end_ts - start_ts) | int }}"
      duration_str: >-
        {% set s = (end_ts - start_ts) | int %}
        {% set h = s // 3600 %}
        {% set m = (s % 3600) // 60 %}
        {% set sec = s % 60 %}
        {% if h > 0 %}
          {{ '%d:%02d:%02d'|format(h,m,sec) }}
        {% elif m > 0 %}
          {{ '%d:%02d'|format(m,sec) }}
        {% else %}
          {{ sec }}
        {% endif %}
      energy_end: "{{ states(energy_entity) | float(0) if energy_entity else none }}"
      energy_used: >-
        {% if energy_entity %}
          {{ (energy_end - energy_start) | float }}
        {% else %}
          {{ none }}
        {% endif %}
      energy_used_wh: >-
        {% if energy_entity and energy_uom in ['kWh','kwh'] %}
          {{ ((energy_end - energy_start) * 1000) | round(1) }}
        {% elif energy_entity and energy_uom in ['Wh','wh'] %}
          {{ (energy_end - energy_start) | round(1) }}
        {% else %}
          {{ none }}
        {% endif %}

  # User actions (can use duration_* and energy_* variables)
  - choose: []
    default: !input actions

mode: single
max_exceeded: silent