Hi there,
these are my first steps to make a blueprint, so thank you for being lenient with me… 
Tried to modifiy this blueprint to use in another scenario: I want to check periodically if any windows or doors are open and then to be notified of.
Sadly my condition seems to be wrong as the blueprint cannot be loaded.
Any help would be really appreciated -
thank you!
blueprint:
name: Open Window detection & notification for all contact sensors
description: Regularly test all sensors with 'door' or 'window' device-class
for being open and if so execute an action.
domain: automation
input:
time_period:
name: Time period to test on
description: Test is run at configured time period
default: '5'
selector:
number:
min: 1
max: 30
unit_of_measurement: 'min'
mode: slider
step: 1
exclude:
name: Excluded Sensors
description: Contact sensors (e.g. internal doors) to exclude from detection. Only
entities are supported, devices must be expanded!
default:
entity_id: []
selector:
target:
entity:
- device_class: door
- device_class: window
actions:
name: Actions
description: Notifications or similar to be run. {{sensors}} is replaced with
the names of sensors being open.
selector:
action: {}
variables:
time_period: !input time_period
exclude: !input exclude
sensors: >-
{% set result = namespace(sensors=[]) %}
{% for state in states.sensor | selectattr('attributes.device_class', '==', 'binary_sensor') %}\n
{% if 'on' <= state.state | int and not state.entity_id in exclude.entity_id %}
{% set result.sensors = result.sensors + [state.name ~ ' (' ~ state.state ~ ' %)'] %}
{% endif %}
{% endfor %}
{% for state in states.binary_sensor | selectattr('attributes.device_class', '==', 'binary_sensor') | selectattr('state', '==', 'on') %}
{% if not state.entity_id in exclude.entity_id %}
{% set result.sensors = result.sensors + [state.name] %}
{% endif %}
{% endfor %}
{{result.sensors|join(', ')}}
trigger:
- platform: time_pattern
minutes: /!input time_period
condition:
- '{{ is_state (sensors != '''', 'on') }}'
action:
- choose: []
default: !input actions
mode: single
