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

report_zigbee_zwave_devices_gone_offline2.yaml

blueprint:
  name: Report offline zigbee/zwave/battery/smart plug devices with device exclusion
  description: Works with Smart Plugs, ZWave, Zigbee etc (Works with ZHA & Z2M). Now supports excluding entire devices.
  #By Tahutipai 2024-02-21, updated to include device exclusion
  #Originally Based on the work of Sybx @ https://community.home-assistant.io/t/low-battery-level-detection-notification-for-all-battery-sensors/258664
  #Note: This has been upgraded to report only the Device that is offline, not multiple individual sensors within one Device
  domain: automation
  input:
    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_entities:
      name: Excluded Entities
      description: Entities to exclude from detection. Specify entity IDs.
      default: []
      selector:
        entity: {}
    exclude_devices:
      name: Excluded Devices
      description: Devices to exclude from detection. Specify device IDs.
      default: []
      selector:
        device: {}
    actions:
      name: Actions
      description: Call your notification here. {{offline_devices}} will replaced with the name of any offline devices
      selector:
        action: {}        
  source_url: https://gist.github.com/Tahutipai/971bf0e07e50ce6190e0dacd73262e2e
variables:
  day: !input 'day'
  exclude_entities: !input 'exclude_entities'
  exclude_devices: !input 'exclude_devices'
  offline_devices: >-
    {% set result = namespace(offline_devices=[]) %}
    {% for entity in states %}
      {% if entity.state == 'unavailable' %}
        {% set dev_id = state_attr(entity.entity_id, 'device_id') %}
        {% if dev_id and dev_id not in exclude_devices and entity.entity_id not in exclude_entities %}
          {% set device_name = device_attr(dev_id, 'name') %}
          {% if device_name and device_name not in result.offline_devices %}
            {% set result.offline_devices = result.offline_devices + [device_name] %}
          {% endif %}
        {% endif %}
      {% endif %}
    {% endfor %}
    {{ result.offline_devices | join(', ') }}
trigger:
  - platform: time
    at: !input 'time'
condition:
  - condition: template
    value_template: "{{ offline_devices != '' and (day | int == 0 or day | int == now().isoweekday()) }}"
action:
- choose: []
  default: !input 'actions'
mode: single