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

low-battery-and-unavailable-check.yaml

blueprint:
  name: Low Battery and Device Unavailable Check
  description: Regularly test all sensors with 'battery' device-class for crossing
    a certain battery level threshold as well as if it is unavailable.
  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: Removed Battery only selection to select any entity like switches. Only entities are supported, devices must be expanded!
      default: {entity_id: []}
      selector:
        target:
    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.sensor | selectattr('attributes.device_class', 'defined') | selectattr('attributes.device_class', '==', 'battery') %}
      {% if "unavailable" in state | string  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 %}
    {% for state in states.binary_sensor | selectattr('attributes.device_class', 'defined') | selectattr('attributes.device_class', '==', 'battery') %}
      {% if "unavailable" in state | string and not state.entity_id in exclude.entity_id %}
        {% set result.sensors = result.sensors + [ state.name ~ ' (' ~ state.state ~ ')'] %}
      {% endif %}
    {% endfor %}
    {% for state in states.switch | selectattr('state','eq','unavailable') %}    
      {% if state.entity_id not in exclude.entity_id %}
        {% 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

I have 7 Aqara Roller Shade motors, but these have a battery level issue, where once they get below 55% they fail to operate correctly and Aqara refuses to fix the issue. So in my case it was easier to "include" just these sensors and have a automation to warning me once they reach 60%, rather than "exclude" all the other battery sensors (over 50 of them). So now i have 2 automation one with only these included and 60%, and another with these excluded with 20%.

Hope that make sense.

Ah that makes sense, thanks for that clarification :) I'll try out your modifications soon

added an option to list unavailable or not. here my gist https://gist.github.com/andyblac/35b4164355dbef4f998f358353278236 based on your code, hope you don't mind

added an option to list unavailable or not. here my gist https://gist.github.com/andyblac/35b4164355dbef4f998f358353278236 based on your code, hope you don't mind

Logger: homeassistant.helpers.template
Source: helpers/template.py:2209
First occurred: 18:20:15 (4 occurrences)
Last logged: 18:22:47

Template variable warning: 'sensors' is undefined when rendering '{{sensors}}'

you got any idea how I screw this up?

hi, sure thats np, here is my latest version, it now adds send message as default you only have to add the device(s)

Hi,

just fixed this issue in my gist here, it stops the error in logs.

Thanks for this - it works great and saved me a ton of time!