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

report_zigbee_zwave_devices_gone_offline.yaml

blueprint:
  name: Report offline zigbee/zwave/battery/smart plug devices
  description: Works with Smart Plugs, ZWave, Zigbee etc (Works with ZHA & Z2M)
  #By Tahutipai 2024-02-21
  #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:
      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
              - switch
    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: !input 'exclude'
  offline_devices: >-
    {% set result = namespace(offline_devices=[]) %}
    {% for sensor in states.sensor | selectattr('attributes.device_class', 'defined') | selectattr('attributes.device_class', '==', 'battery') %}
      {% if "unavailable" in sensor | string  and not sensor.entity_id in exclude.entity_id %}
        {% set result.offline_devices = result.offline_devices + [device_attr(device_id(sensor.entity_id), "name")] %}
      {% endif %}
    {% endfor %}
    {% for binary_sensor in states.binary_sensor | selectattr('attributes.device_class', 'defined') | selectattr('attributes.device_class', '==', 'battery') %}
      {% if "unavailable" in binary_sensor | string and not binary_sensor.entity_id in exclude.entity_id %}
        {% set result.offline_devices = result.offline_devices + [device_attr(device_id(binary_sensor.entity_id), "name")] %}
      {% endif %}
    {% endfor %}
    {% for switch in states.switch | selectattr('state','eq','unavailable') %}
      {% if switch.entity_id not in exclude.entity_id %}
        {% set result.offline_devices = result.offline_devices + [device_attr(device_id(switch.entity_id), "name")] %}
      {% endif %}
    {% endfor %}
    {{result.offline_devices|sort|unique|join('\n')}}
trigger:
- platform: time
  at: !input 'time'
condition:
- '{{ offline_devices != '''' and (day | int == 0 or day | int == now().isoweekday()) }}'
action:
- choose: []
  default: !input 'actions'
mode: single

Great thanks @psitem, have implemented your suggestions.

Ya if I look at the yaml in vscode/fileeditor/vim/cat, that block is all screwed up (appearence wise), and quite a few additional charatachers (escape'd double quotes etc). Looks like HA is running it through some type of parser.

I cleaned up the original file just now, there was some blank space at the end of a few lines, and a found a couple of tabs instead of spaces in places, then re-imported it: no change, same messy result.

If you even come across the answer to that one, do let me know. cheers!