Add initial mqtt notification page

source/_components/notify.mqtt.markdown

@@ -0,0 +1,29 @@
+---
+layout: component
+title: "MQTT notifications"
+description: "Instructions how to add MQTT notifications to Home Assistant."
+date: 2016-02-01 08:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: mqtt.png
+ha_category: Notifications
+---
+
+The MQTT notification support is different than the other [notification](/components/notify/) platforms. It is a service. This means that you don't have to create a configuration entry but you need to provide more details while calling the service.
+
+**Call Service** section from the **Developer Tools** allows you to send MQTT messages. Choose *mqtt/publish*  from the list of **Available services:** and enter something like the sample below into the **Service Data** field and hit **CALL SERVICE**.
+
+```json
+{"payload": "Test message from HA", "topic": "home/notification", "qos": 0, "retain": 0}
+```
+
+Using the [REST API](/developers/rest_api/#post-apiservicesltdomainltservice) to send a message to a given topic.
+
+```bash
+$ curl -X POST -H "x-ha-access: YOUR_PASSWORD" \
+       -d '{"payload": "Test message from HA", "topic": "home/notification"}' \
+       http://IP_ADDRESS:8123/api/services/mqtt/publish
+```
+