Home assistant blueprint for detecting sensors of type "problem" with an error state, such as firealarm sensors, overheat sensors on sockets etc

problem-sensor-reporting-problems.yaml

blueprint:
  name: System wide problem detector for Iot sensors of device class "problem"
  description: Regularly test all sensors with device-class 'problem' to detect if anyone indicates an error.
  domain: automation
  input:
    repetition:
      name: How often to run
      description: Test is run at this intervall, in minutes. You MUST use the slash notation; 0-59 minutes.
      default: '/45'
      selector:
        text:
          multiline: false
    exclude:
      name: Excluded Sensors
      description: >
        There are some weird sensors out there, we might want to ignore. 
        Only entities are supported, devices must be expanded
      default: {entity_id: []}
      selector:
        target:
          entity:
            device_class: problem
    debug_mode:
      name: Debug Mode
      description: Make blueprint list entities that are "off", instead of "on".
      default: false
      selector:
        boolean: 
    entity_only:
      name: Entities only
      description: >
        The 'sensors' list will only contain entity_id's instead of a combined string of name and id.
      default: false
      selector:
        boolean: 
    actions:
      name: Actions
      description: 'Notifications or similar to be run. {{sensors}} is replaced with the names[] of devices indicating a problem.'
      selector:
        action: {}
variables:
  exclude: !input 'exclude'
  debug: !input 'debug_mode'
  entity_id_only: !input 'entity_only'
  sensors: >-
    {%- set result_on = namespace(sensors=[]) -%}
    {%- set result_off = namespace(sensors=[]) -%}
    {%- for state in states.binary_sensor | selectattr('attributes.device_class', '==', 'problem') %}
      {%- if state.state == true and not state.entity_id in exclude.entity_id -%}
        {%- if not entity_id_only -%} 
          {% set result_on.sensors = result_on.sensors + [state.name ~ ' (id: ' ~ state.entity_id ~ ' )'] %}
        {%- else -%} 
          {% set result_on.sensors = result_on.sensors + [state.entity_id] %}
        {%- endif -%} 
      {%- elif not state.entity_id in exclude.entity_id -%}
        {%- if not entity_id_only -%} 
          {% set result_off.sensors = result_off.sensors + [state.name ~ ' (id: ' ~ state.entity_id ~ ' )'] %}
        {%- else -%} 
          {% set result_off.sensors = result_off.sensors + [state.entity_id] %}
        {%- endif -%} 
      {%- endif -%}
    {%- endfor -%}
    {%- if not debug -%}
      {{result_on.sensors}}
    {%- else -%}
      {{result_off.sensors}}
    {%- endif -%}
trigger:
- platform: time_pattern
  minutes: !input 'repetition'
condition:
- '{{ sensors|length != 0 }}'
action:
- choose: []
  default: !input 'actions'
mode: single

Based on the very useful https://gist.github.com/sbyx/1f6f434f0903b872b84c4302637d0890