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.
  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/sbyx/1f6f434f0903b872b84c4302637d0890
variables:
  day: !input 'day'
  threshold: !input 'threshold'
  exclude: !input 'exclude'
  sensors: >-
    {% set result = namespace(sensors=[]) %}
    {% for state in states.sensor | selectattr('attributes.device_class', '==', 'battery') %}
      {% if 0 <= state.state | int(-1) < threshold | int and not state.entity_id in exclude.entity_id %}
        {% set result.sensors = result.sensors + [state.name ~ ' (' ~ state.state ~ ' %)'] %}
      {% endif %}
    {% endfor %}
    {% for state in states.binary_sensor | 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(', ')}}
trigger:
- platform: time
  at: !input 'time'
condition:
- '{{ sensors != '''' and (day | int == 0 or day | int == now().isoweekday()) }}'
action:
- choose: []
  default: !input 'actions'
mode: single

Did I do something wrong? I had to add the following code to avoid receiving notifications with an empty list:

action:
- choose:
    - conditions: "{{ result|length > 0 }}"
      sequence: !input actions

Great blueprint @sbyx !

It would be awesome if there were exclude options other than just entities. Labels would be very useful!

I am jusing RFXCom for some devices I have around the house and the only way to painlessly add devices to it is to use "Enable automatic add" but this means that I have 4792 entities(!) from the whole block added with that integration. Needless to say I do not want to receive low battery alarms for all of them :-) And excluding them one by one is not going to work.

If it would be possible to exclude certain labels it would be great. Then I could add a label to all but the entities that actually are mine and get low battery alerts only for those.

Even better would be to have the option to pick a label to include.

Maybe I'm stupid but is it possible to add the battery type from the battery notes integration to the notification and todo list, so I can immediately
can order the correct batteries.
Thanks in advance for any help

it would be great if these can be include for reference , location and label as batterij info
{{labels(state.entity_id)}}
{{area_name(state.entity_id) }},
{{floor_name(state.entity_id)}}

Hi sbyx,

thanks for this great work.
I'd like to use your script for visualizing battery status for all my devices in a battery-state-card or lovelace-auto-entities-card.
Have you ever considered doing that? Or maybe someone else has done it already.
Werner

Like @Memnom already stated: It would be nice to have at least the area name in the notification so you don't have to rename every battery entity to know where this device is.

Can we please finally - after this was raised already in October 2022 - have an INCLUDE setting?

https://community.home-assistant.io/t/low-battery-level-detection-notification-for-all-battery-sensors/258664/227