wake_and_sleep_light.yaml

blueprint:
  name: Wake and sleep light
  description: |
    If a light is turned on in a very dim state, do one of two actions:
    a) raise its brightness in steps up to maximum brightness in a given time frame, or
    b) set it to its minimum brightness.
    Turning the light to its maximum brightness or off will stop the actions.
  source_url: https://gist.github.com/akloeckner/6f5d3299b5661ef1830171db1957b1a0
  domain: automation
  input:
    light_entity:
      name: Light entity
      description: The light to control
      selector:
        entity:
          domain: light
    wake_time_start:
      name: Start of the wake-up time frame
      description: The beginning of the time frame, where the automation should behave as a wake-up light
      default: '07:00:00'
      selector:
        time: {}
    wake_time_end:
      name: End of the wake-up time frame
      description: The end of the time frame, where the automation should behave as a wake-up light
      default: '10:00:00'
      selector:
        time: {}
    trigger_brightness:
      name: Trigger brightness
      description: The brightness below which this automation will trigger
      default: 50
      selector:
        number:
          min: 1.0
          max: 255.0
          step: 1.0
          mode: slider
    sleep_brightness:
      name: Sleep brightness
      description: The brightness so set when used as a sleep light
      default: 25
      selector:
        number:
          min: 1.0
          max: 255.0
          step: 1.0
          mode: slider
    max_brightness:
      name: Maximum brightness
      description: The ultimate brightness to turn the wake-up light to
      default: 255
      selector:
        number:
          min: 1.0
          max: 255.0
          step: 1.0
          mode: slider
    wake_duration:
      name: Wake-up duration
      description: The timespan in which to reach full brightness in minutes
      default: 5
      selector:
        number:
          min: 1.0
          max: 30.0
          step: 1.0
          mode: slider

mode: single
max_exceeded: silent

variables:
  light_entity: !input 'light_entity'
  trigger_brightness: !input 'trigger_brightness'
  max_brightness: !input 'max_brightness'
  wake_duration: !input 'wake_duration'
  step: 5

trigger:
- platform: state
  entity_id: !input 'light_entity'
  from: 'off'
  to: 'on'
  for: 5

condition:
- condition: template
  value_template: "{{ is_state(light_entity, 'on') and state_attr(light_entity, 'brightness') < float(trigger_brightness) }}"

action:
- alias: "Set up runtime variables"
  variables:
    start_brightness: "{{ state_attr(light_entity, 'brightness') }}"
    start_time: "{{ as_timestamp(now()) }}"
    wake_gradient: "{{ (max_brightness-start_brightness) / float(wake_duration) / 60 }}"
    wake_tick: "{{ float(step) / wake_gradient }}"
- alias: "Turn up brightness in the morning, else set minimum brightness"
  choose:
    conditions:
    - condition: time
      after:  !input 'wake_time_start'
      before: !input 'wake_time_end'
    sequence:
    - repeat:
        while:
        - "{{ is_state(light_entity, 'on') and state_attr(light_entity, 'brightness') < float(max_brightness) }}"
        sequence:
        - service: light.turn_on
          entity_id: !input 'light_entity'
          data_template:
            #brightness: "{{ (state_attr(light_entity, 'brightness')+float(step)) | min(float(max_brightness)) }}"
            brightness: "{{ start_brightness + (as_timestamp(now())-start_time) * wake_gradient }}"
        - delay: "{{ wake_tick }}"
  default:
  - service: light.turn_on
    entity_id: !input 'light_entity'
    data:
      brightness: !input 'sleep_brightness'