Home Assistant Blueprint: Low battery level detection & notification for all battery sensors

low-battery-level-detection-notification-for-all-battery-sensors.yaml

blueprint:
  name: Low battery level detection & notification for all battery sensors
  description: Regularly test all sensors with 'battery' device-class for crossing
    a certain battery level threshold and if so execute an action.
    Forked from version by Schm1tz1 which was forked by original by sbyx. 
    - changed results list delimiter from comma to newlines
    - added persistent notification action (but still support additional actions)
    - excludes mobile device battery sensors (adapted from blueprint by Marck)
    For any battery sensors that are not detected, use Customize to set
    device_class = battery.
  domain: automation
  input:
    threshold:
      name: Battery warning level threshold
      description: Battery sensors below threshold are assumed to be low-battery (as
        well as binary battery sensors with value 'on').
      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
    exclude:
      name: Excluded Sensors
      description: Battery sensors (e.g. smartphone) to exclude from detection. Only
        entities are supported, devices must be expanded!
      default:
        entity_id: []
      selector:
        target:
          entity:
            device_class: battery
    actions:
      name: Actions
      description: Notifications or similar to be run. {{sensors}} is replaced with
        the names of sensors being low on battery.
      selector:
        action: {}
  source_url: https://gist.github.com/NateEaton/287caef748ad6d3bd8cf173afe649bdc
variables:
  day: !input day
  threshold: !input threshold
  exclude: !input exclude
  sensors: >-
    {% set result = namespace(sensors=[]) %}
    {% for state in states.sensor 
      | rejectattr('attributes.device_class', 'undefined') 
      | selectattr('attributes.device_class', '==', 'battery') %}
      {% if 0 <= state.state | int(-1) < threshold | int 
        and not state.entity_id in exclude.entity_id 
        and state.entity_id not in integration_entities("mobile_app") %}
        {% set result.sensors = result.sensors + [state.name ~ ' ' ~ state.attributes.battery_type ~ ' (' ~ state.state ~ ' %)'] %}
      {% endif %}
    {% endfor %}
    {% for state in states.binary_sensor 
      | rejectattr('attributes.device_class', 'undefined') 
      | selectattr('attributes.device_class', '==', 'battery') 
      | selectattr('state', '==', 'on') %}
      {% if not state.entity_id in exclude.entity_id %}
        {% set result.sensors = result.sensors + [state.name] %}
      {% endif %}
    {% endfor %}
    {{result.sensors|join('\n')}}
trigger:
- platform: time
  at: !input time
condition:
- '{{ sensors != '''' and (day | int == 0 or day | int == now().isoweekday()) }}'
action:
- choose: []
  default: !input actions
- service: persistent_notification.create
  data:
    title: Low Battery Level Warning
    notification_id: LowBatteryLevelWarning
    message: |-
      **Battery level below {{threshold}}%:**
      {{sensors}}
mode: single