I edited @AndySymons sensor to output unavailable device count rather than entities.
It also inverts the order of the sensor details so that the list of unavailable devices is at the top and the entity IDs are at the bottom.
##----------------------------------------------------------------------------------------------------------------------
##
## Unavailable Devices Sensor
##
## 05-Feb-2024 | Andy Symons | created
## 16-May-2024 | mr_roboto | updated to track unavailable device count rather than entities
##
## Credit: based loosely on https://github.com/jazzyisj/unavailable-entities-sensor/blob/main/README.md
##
## The sensor provides lists related to real devices, not internal entities, helpers, automations etc.,
## Entities with state 'unknown' are not counted, because it is possible for a device to have a sub-entity that is
## unknown while the device itself is available.
##
## The STATE simply gives the count of unavailable entities.
## The long results have to be attributes because the state cannot contain more than 255 characters:
## ATTRIBUTE 'entity_id_list' contains a list of unavailable entities using their entity ids, which may or may not have been set by the user.
## ATTRIBUTE 'entity_name_list' contains a list of unavailable entities using their friendly names as assigned by the user.
## ATTRIBUTE 'device_name_list contains a list of the devices that are unavailable, which is to say having one or more entities that are unavailable,
## using their friendly names as assigned by the user.
##
##----------------------------------------------------------------------------------------------------------------------
template:
- sensor:
name: "Unavailable Devices"
unique_id: unavailable_devices
icon: "{{ iif(states(this.entity_id)|int(-1) > 0,'mdi:alert-circle','mdi:check-circle') }}"
state_class: measurement
unit_of_measurement: devices
# The entity state is the count of unavailable devices.
state: >
{{ states
| selectattr('domain','in',['binary_sensor', 'climate', 'light', 'sensor', 'switch'])
| selectattr('state', 'in', ['unavailable'])
| map(attribute='entity_id')
| map('device_attr', 'name_by_user')
| reject('match', 'None')
| unique
| list
| count
}}
# The long results have to be attributes because the state cannot contain more than 255 characters.
attributes:
## A list of the devices that are unavailable, using their friendly names as assigned by the user.
device_name_list: >-
{{ states
| selectattr('domain','in',['binary_sensor', 'climate', 'light', 'sensor', 'switch'])
| selectattr('state', 'in', ['unavailable'])
| map(attribute='entity_id')
| map('device_attr', 'name_by_user')
| reject('match', 'None')
| unique
| list
| sort
| join('\n')
}}
## A list of unavailable entities using their friendly names as assigned by the user.
entity_name_list: >-
{{ states
| selectattr('domain','in',['binary_sensor', 'climate', 'light', 'sensor', 'switch'])
| selectattr('state', 'in', ['unavailable'])
| map(attribute='entity_id')
| map('state_attr', 'friendly_name')
| reject('match', 'None')
| list
| sort
| join('\n')
}}
## A list of unavailable entities using their entity ids (which may or may not have been set by the user).
entity_id_list: >-
{{ states
| selectattr('domain','in',['binary_sensor', 'climate', 'light', 'sensor', 'switch'])
| selectattr('state', 'in', ['unavailable'])
| map(attribute='entity_id')
| reject('match', 'None')
| list
| sort
| join('\n')
}}
# HOW THE ATTRIBUTE TEMPLATES WORK
# -- Taking device_name_list as an example...
#
# {{ states -- all the states (entities) in the system
# | selectattr('domain','in',['binary_sensor', 'climate', etc. -- filter only the entities for real devices
# | selectattr('state', 'in', ['unavailable']) -- filter only entities that are unavailable
# | map(attribute='entity_id') -- get the entity id from the record
# | map('device_attr', 'name_by_user') -- map the entity id onto the device name
# | reject('match', 'None') -- take out names 'None' (meaning there is no name, so not a device)
# | unique -- take out duplicates (devices usually have several entities)
# | list -- make into a list (in the template sense)
# | sort -- put them in alphabetical order
# | join('\n') -- take out extraneous punctuation for a tidy output
# }}
I learned a lot.
.
