Add presence detection getting started

source/getting-started/automation.markdown

@@ -169,3 +169,4 @@ go automate!
  - Learn about the available [automation conditions](/components/automation.html#conditions)
  - Learn about [scripts](/components/script.html) to help you trigger multiple actions and delays
  - Learn about [scenes](/components/scene.html) to help you set many entities at once to your liking
+ - Setup the [notification component](/components/#notify-service) to sent yourself messages

source/getting-started/devices.markdown

@@ -19,11 +19,6 @@ and services.  Many components use the `sensor` platform.  Sensors need to be ad
 Most components that support multiple entries within the <code>configuration.yaml</code> follow the <code>component:</code>, <code>component 2:</code> format.
 </p>
 
-To get the most out of automation, it is useful to setup the following things:
-
- * [Presence Detection](/components/#presence)
- * [Notification service](/components/#notify-service)
-
 If you can't find support for your favorite device or service,
 [consider adding support](/developers/add_new_platform.html)
 
@@ -63,4 +58,4 @@ homeassistant:
 ```
 
 
-###[Next step: Setting up automation &raquo;](/getting-started/automation.html)
+###[Next step: Setting up presence detection &raquo;](/getting-started/presence-detection.html)

source/getting-started/presence-detection.markdown

@@ -0,0 +1,66 @@
+---
+layout: page
+title: "Setting up presence detection"
+description: "Instructions how to setup presence detection within Home Assistant."
+date: 2015-10-4 12:08
+sidebar: false
+comments: false
+sharing: true
+footer: true
+---
+
+<p class='note'>
+We care about privacy. Collected data is <b>only</b> stored in your instance of Home Assistant.
+</p>
+
+Presence detection detects if people are home, an important input for automation. The most important
+piece of information is to know if anyone is home. But knowing who is home or where they are will open
+a whole range of other automation options:
+
+ - Send me a notification when the kid arrives at school
+ - Turn on AC when I leave work
+
+<p class='img'>
+<img src='/images/screenshots/map.png' />
+Screenshot of Home Assistant showing a school, work and home zone and two people.
+</p>
+
+## {% linkable_title Setting it up %}
+
+The device tracker component offers presence detection for Home Assistant. It supports two different
+methods for presence detection: scan for connected devices on the local network and connect to third
+party service.
+
+Scanning for connected devices is easy to setup. See the instructions for our [supported routers][routers]
+or [scan the network using nmap][nmap]. This approach does have its limitations. It will only be able
+to detect if a device is home. It also struggles with iPhones because they disconnect from the WiFi if
+idle, marking them as not home while they are not.
+
+Home Assistant currently supports one third party service for presence detection: [OwnTracks](http://www.owntracks.org).
+OwnTracks is an app that you install on your iPhone or Android phone that allows you to push the location
+of your device to Home Assistant using an MQTT broker. An MQTT broker is an Internet of Things communication
+platform that you can [freely host yourself][mqtt-self] or get [a private instance for free in the cloud](/components/mqtt.html#run-your-own).
+
+<p class='note'>
+OwnTracks communicates directly with your MQTT broker, no data will pass through their servers.
+</p>
+
+#### {% linkable_title Zones %}
+
+<img src='/images/screenshots/badges-zone.png' style='float: right; margin-left: 8px; height: 100px;'>
+Home Assistant will know about the location for your device if you are using OwnTracks. By [setting up
+zones][zone] you will be able to add names to locations of your devices. This way you can easily
+spot on the state page where the people in your house are and use it as [triggers][trigger] and
+[conditions][condition] for automation.
+
+###[Next step: Setting up automation &raquo;](/getting-started/automation.html)
+
+[routers]: /components/#presence
+[nmap]: /components/device_tracker.nmap_scanner.html
+[ha-owntracks]: /components/device_tracker.owntracks.html
+[mqtt-self]: /components/mqtt.html#run-your-own
+[mqtt-cloud]: /components/mqtt.html#cloudmqtt
+[zone]: /components/zone.html
+[trigger]: /components/automation.html#zone-trigger
+[condition]: /components/automation.html#zone-condition
+