Clarify that hass.io only supports bluetooth on RPi3 (home-assistant#3336)

Leon99 · fabaff · commit d071d6a9ead7 · 2017-09-10T22:31:19.000+02:00
* Clarify that hass.io only supports bluetooth on RPi3

* Minor changes
diff --git a/source/_components/device_tracker.bluetooth_tracker.markdown b/source/_components/device_tracker.bluetooth_tracker.markdown
@@ -13,10 +13,10 @@ ha_iot_class: "Local Polling"
 ha_release: 0.18
 ---
 
-This tracker discovers new devices on boot and tracks bluetooth devices periodically based on interval_seconds value. It is not required to pair the devices with each other! Devices discovered are stored with 'bt_' as the prefix for device mac addresses in `known_devices.yaml`.
+This tracker discovers new devices on boot and tracks Bluetooth devices periodically based on `interval_seconds` value. It is not required to pair the devices with each other! Devices discovered are stored with 'bt_' as the prefix for device MAC addresses in `known_devices.yaml`.
 
 <p class='note'>
-If you are using [Hass.io](/hassio/) you will need to enable the Bluetooth BCM43xx (/addons/bluetooth_bcm43xx/) addon.
+[Hass.io](/hassio/) only supports bluetooth on Raspberry Pi 3 via the Bluetooth BCM43xx (/addons/bluetooth_bcm43xx/) addon. [Hass.io](/hassio/) doesn't support external Bluetooth dongles.
 </p>
 
 To use the Bluetooth tracker in your installation, add the following to your `configuration.yaml` file:
@@ -27,6 +27,6 @@ device_tracker:
   - platform: bluetooth_tracker
 ```
 
-In some cases it can be that your device is not discovered. In that case let your phone scan for BT devices while you restart Home Assistant. Just hit `Scan` on your phone all the time until Home Assistant is fully restarted and the device should appear in `known_devices.yaml`.
+In some cases it can be that your device is not discovered. In that case let your phone scan for Bluetooth devices while you restart Home Assistant. Just hit `Scan` on your phone all the time until Home Assistant is fully restarted and the device should appear in `known_devices.yaml`.
 
 For additional configuration variables check the [Device tracker page](/components/device_tracker/).
