I also use https://api.public-warning.app/api/v1/providers/nl-alert/alerts as the source for NL alert. This is the official NL-Alert endpoint also used by Actueel | NL Alert.
Using a REST-sensor I poll this endpoint every five minutes with this YAML configuration:
- resource: https://api.public-warning.app/api/v1/providers/nl-alert/alerts
scan_interval: 300
sensor:
- name: NL-Alert
icon: mdi:message-alert
value_template: >
{{ value_json.data[0].id }}
json_attributes_path: $.data[0]
json_attributes:
- id
- message
- start_at
- stop_at
- area
Then I run an automation every time this sensor is updated to roughly determine if the alert is applicable, and turn off or on ventilation if it is specified in the message.
alias: NL-Alert
description: ""
triggers:
- trigger: state
entity_id:
- sensor.nl_alert
conditions:
- alias: NL-Alert applicable to Home zone
condition: template
value_template: |-
{% set area_string = state_attr("sensor.nl_alert","area")[0] %}
{% set area = area_string.split(" ") %}
{% set coordinates = area[0].split(",") | map("float") | list %}
{% set min = namespace(lat=coordinates[0],lon=coordinates[1]) %}
{% set max = namespace(lat=coordinates[0],lon=coordinates[1]) %}
{% for coordinate_string in area %}
{% set coordinates = coordinate_string.split(",") | map("float") | list %}
{% set min.lat = [min.lat, coordinates[0]] | min %}
{% set max.lat = [max.lat, coordinates[0]] | max %}
{% set min.lon = [min.lon, coordinates[1]] | min %}
{% set max.lon = [max.lon, coordinates[1]] | max %}
{% endfor %}
{% set target = namespace(
lat=state_attr("zone.home","latitude"),
lon=state_attr("zone.home","longitude")
) %}
{% set inside = (
target.lat >= min.lat and target.lat <= max.lat and
target.lon >= min.lon and target.lon <= max.lon
) %}
{{ inside }}
actions:
- alias: Check for fan control
choose:
- conditions:
- condition: template
value_template: >-
{{ "ventilatie uit" in (state_attr("sensor.nl_alert","message") |
lower) }}
sequence:
- action: automation.turn_off
metadata: {}
data:
stop_actions: true
target:
entity_id: automation.fan_control
- action: fan.turn_off
metadata: {}
data: {}
target:
entity_id: fan.itho_cve_fan
alias: Ventilation off
- conditions:
- condition: template
value_template: >-
{{ "ventilatie aan" in (state_attr("sensor.nl_alert","message") |
lower) }}
sequence:
- action: automation.turn_on
metadata: {}
data: {}
target:
entity_id: automation.fan_control
- action: automation.trigger
metadata: {}
data:
skip_condition: true
target:
entity_id: automation.fan_control
alias: Ventilation on
- action: notify.notify
metadata: {}
data:
message: |-
{{ state_attr("sensor.nl_alert","message") }}
title: NL-Alert
- action: tts.speak
metadata: {}
data:
cache: true
message: |-
"NL Alert: {{ state_attr("sensor.nl_alert","message") }}
language: nl_NL
media_player_entity_id: media_player.alle_speakers
target:
entity_id: tts.piper
mode: single
This gives you a sensor that will look something like this:
And can be integrated into a dashboard with a markdown card:
