Home Assistant Blueprint: Low ink level detection & notification for all IPP printers

ink-toner-level-detection-notification-for-all-IPP-printers.yaml

blueprint:
  name: Low ink level detection & notification for all IPP printers
  description: Regularly test all sensors with 'ink' marker_type for crossing
    a certain ink level threshold and if so execute an action.
  domain: automation
  input:
    threshold:
      name: Ink warning level threshold
      description: Ink sensors below threshold are assumed to be low-ink.
      default: 20
      selector:
        number:
          min: 5.0
          max: 100.0
          unit_of_measurement: '%'
          mode: slider
          step: 5.0
    time:
      name: Time to test on
      description: Test is run at configured time
      default: '10:00:00'
      selector:
        time: {}
    day:
      name: Weekday to test on
      description: 'Test is run at configured time either everyday (0) or on a given
        weekday (1: Monday ... 7: Sunday)'
      default: 0
      selector:
        number:
          min: 0.0
          max: 7.0
          mode: slider
          step: 1.0
    actions:
      name: Actions
      description: Notifications or similar to be run. {{sensors}} is replaced with
        the names of sensors being low on ink.
      selector:
        action: {}
  source_url: https://gist.github.com/JohnNeville/eaf431719d50449d4f9c0635664d7c3c
variables:
  day: !input 'day'
  threshold: !input 'threshold'
  sensors: >-
    {% set result = namespace(sensors=[]) %}
    {% set inksensors = states.sensor | selectattr('attributes.marker_type', 'defined') | selectattr('attributes.marker_type', '==', 'ink') %} 
    {% for state in  inksensors %}
      {% if 0 <= state.state | int(-1) < threshold %}
        {% set result.sensors = result.sensors + [state.name ~ ' (' ~ state.state ~ ' %)'] %}
      {% endif %}
    {% endfor %}
    {{result.sensors|join(', ')}}
trigger:
- platform: time
  at: !input 'time'
condition:
- '{{ sensors != '''' and (day | int == 0 or day | int == now().isoweekday()) }}'
action:
- choose: []
  default: !input 'actions'
mode: single