Home Assistant Blueprint: Low battery level detection & notification for ruuvitags

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

blueprint:
  name: Low battery level detection & notification for ruuvitags. 
  description: Regularly test all ruuvitags for crossing
    a certain battery level threshold and if so execute an action.
    Ruuvitag says that 1800mV tag should still function but it depends on temperature etc.
    1900 mV during -10C seems to be too low for my units but YMMV
  domain: automation
  input:
    threshold:
      name: Battery warning level threshold
      description: Battery sensors below threshold are assumed to be low-battery
      default: 2100
      selector:
        number:
          min: 1800.0
          max: 3000.0
          unit_of_measurement: 'mV'
          mode: slider
          step: 50.0
    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
    excluded:
      name: Excluded sensors
      description: "Remove all sensor you want to ignore (other sensors that have _Voltage ending or similar)"
      default: {entity_id: []}
      selector:
        entity:
          multiple: true
          filter: 
            - domain: sensor
              integration: ruuvitag_ble
    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/peltsippi/cb9c1b1da1c7d14432ec0ec0c222d889
variables:
  day: !input 'day'
  threshold: !input 'threshold'
  exclude: !input 'excluded'
  sensors: >-
    {% set result = namespace(sensors=[]) %}
    {% for state in  states.sensor | selectattr('entity_id', 'search', '_voltage') %}
    
      {% 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 ~ ' mV)'] %}
      {% 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

Not working yet

works but not that functional when trying to exclude any sensors

Not working, trying to get exclude device filtering working

Good enough. Selector - entity - cannot use include list from scripts and I don't know any better way than this. All other ruuvitag sensors pop out to exclude list.