Documentation for ee_brightbox device tracker (#7962)

* Documentation for ee_brightbox device tracker

* updated release to 0.86

* ⬆️ ha_release 0.87

source/_components/device_tracker.ee_brightbox.markdown

@@ -0,0 +1,51 @@
+---
+layout: page
+title: "EE Bright Box"
+description: "Instructions on how to integrate EE Bright Box router into Home Assistant."
+date: 2018-12-27 16:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: ee.png
+ha_category: Presence Detection
+ha_release: 0.87
+ha_iot_class: "Local Polling"
+---
+
+This platform offers presence detection by looking at connected devices to a [EE Bright Box 2](https://ee.co.uk/help/phones-and-device/home-broadband/bright-box-2-wireless-router/bright-box-2-wireless-router) router.
+
+## {% linkable_title Configuration %}
+
+To use a EE Bright Box router in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+device_tracker:
+  - platform: ee_brightbox
+    password: router-admin-password
+```
+
+{% configuration %}
+host:
+  description: The IP address of your router
+  default: 192.168.1.1
+  required: false
+  type: string
+username:
+  description: Found at the back of the router in 'Router login details' section
+  default: admin
+  required: false
+  type: string
+password:
+  description: Found at the back of the router in 'Router login details' section
+  required: true
+  type: string  
+version:
+  description: Currently only version 2 of the router is supported
+  default: 2
+  required: false
+  type: string
+{% endconfiguration %}
+
+See the [device tracker component page](/components/device_tracker/) for instructions on how to configure the people to be tracked.