Added information for the MeteoAlarm Sensor (#9375)

* Added information for the MeteoAlarm Sensor

* Update source/_components/meteoalarm.markdown

Co-Authored-By: rolfberkenbosch <30292281+rolfberkenbosch@users.noreply.github.com>

* Update source/_components/meteoalarm.markdown

Co-Authored-By: rolfberkenbosch <30292281+rolfberkenbosch@users.noreply.github.com>

* Update source/_components/meteoalarm.markdown

Co-Authored-By: rolfberkenbosch <30292281+rolfberkenbosch@users.noreply.github.com>

* Update source/_components/meteoalarm.markdown

Co-Authored-By: rolfberkenbosch <30292281+rolfberkenbosch@users.noreply.github.com>

* Update source/_components/meteoalarm.markdown

Co-Authored-By: rolfberkenbosch <30292281+rolfberkenbosch@users.noreply.github.com>

* Update source/_components/meteoalarm.markdown

Co-Authored-By: rolfberkenbosch <30292281+rolfberkenbosch@users.noreply.github.com>

* Update meteoalarm.markdown

* ✏️ Tweak

* Change the sensor to a binary_sensor

* Fix some typos.

source/_components/meteoalarm.markdown

@@ -0,0 +1,107 @@
+---
+layout: page
+title: MeteoAlarm Sensor
+description: "Instructions on how to set up MeteoAlarm binary sensors within Home Assistant."
+date: 2019-05-03 16:50
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: meteoalarm.png
+ha_category: Binary Sensor
+ha_release: 0.93
+ha_iot_class: Local Polling
+---
+
+The `MeteoAlarm` platform allows one to watch for weather alerts in europe from [MeteoAlarm](https://www.meteoalarm.eu) (EUMETNET). To use this binary sensor, you need the two digits of your country and the province name from  [MeteoAlarm](https://www.meteoalarm.eu). Please note that you need to write the exact details from the website with capitals.
+
+The binary sensor state shows if applicable the warning message. The details are available as attribute.
+
+## {% linkable_title Configuration %}
+
+To enable this binary sensor, add the following lines to your `configuration.yaml`:
+
+```yaml
+binary_sensor:
+  - platform: meteoalarm
+    country: 'NL'
+    province: 'Groningen'
+```
+
+{% configuration %}
+name:
+  description: Binary sensor name
+  required: false
+  default: meteoalarm
+  type: string
+country:
+  description: The 2 digits of your country
+  required: true
+  type: string
+province:
+  description: The province
+  required: true
+  type: string
+language:
+  description: "The 4 digits our your language, please be aware that this is only possible in the current country. So 'ne' is only possible in Netherlands. Possible options is: bu, bs, ce, da, de, ee, en, es, ga, ca, su, fr, gr, he, hr, ma, is, it, li, la, sr, mk, ma, ne, no, po, ro, cp, sv, sl, eu."
+  required: false
+  type: string
+  default: 'en'
+{% endconfiguration %}
+
+
+{% linkable_title Example output %}
+
+You will find an example below when the state is "on".
+
+{% raw %}
+attribution: Information provided by MeteoAlarm
+language: en-GB
+category: Met
+event: Severe forest-fire warning
+responseType: Monitor
+urgency: Immediate
+severity: Severe
+certainty: Likely
+effective: 2019-05-02T22:00:00+00:00
+onset: 2019-05-02T22:00:00+00:00
+expires: 2019-05-03T21:59:00+00:00
+senderName: Stig Carlsson
+headline: Orange forest-fire for Hedmark, Oppland
+description: High grass and heather fire hazard in areas without snow until significant amount of precipitation.
+Consequences: Vegetation is very easily ignited and very large areas may be affected.
+instruction: Be very careful with open fire. Follow the instructions from the local authorities. Emergency services should assess a necessary level of alertness.
+awareness_level: 3; orange; Severe
+awareness_type: 8; forest-fire
+unit_of_measurement:
+friendly_name: meteoalarm
+icon: mdi:alert
+{% endraw %}
+
+There are a few awareness levels:
+
+* 2; yellow; Moderate
+* 3; orange; Severe
+* 4; red; High
+
+{% linkable_title Example automation %}
+
+Below you find an example of an automation.
+
+{% raw %}
+automation:
+  - alias: Alert me about weather warnings
+    trigger:
+      platform: state
+      entity_id: binary_sensor.meteoalarm
+      from: ‘off’
+    action:
+      - service: notify.notify
+        data_template:
+          title: '{{state_attr('binary_sensor.meteoalarm', 'headline')}}'
+          message: "{{state_attr('binary_sensor.meteoalarm', 'description')}} is effective on {{state_attr('binary_sensor.meteoalarm', 'effective')}}"
+{% endraw %}
+
+<p class='note warning'>
+This component is not affiliated with MeteoAlarm and retrieves data from the website by using the XML feeds. Use it at your own risk.
+</p>