Allow selection of bluetooth device to use (#5104)

Adding the device_id key to the bevice tracker component allows selecting the bluetooth device to use in case the default device does not have BLE Capabilities

homeassistant/components/device_tracker/bluetooth_le_tracker.py

@@ -19,9 +19,11 @@ REQUIREMENTS = ['gattlib==0.20150805']
 BLE_PREFIX = 'BLE_'
 MIN_SEEN_NEW = 5
 CONF_SCAN_DURATION = "scan_duration"
+CONF_BLUETOOTH_DEVICE = "device_id"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
-    vol.Optional(CONF_SCAN_DURATION, default=10): cv.positive_int
+    vol.Optional(CONF_SCAN_DURATION, default=10): cv.positive_int,
+    vol.Optional(CONF_BLUETOOTH_DEVICE, default="hci0"): cv.string
 })
 
 
@@ -55,7 +57,7 @@ def setup_scanner(hass, config, see):
         """Discover Bluetooth LE devices."""
         _LOGGER.debug("Discovering Bluetooth LE devices")
         try:
-            service = DiscoveryService()
+            service = DiscoveryService(ble_dev_id)
             devices = service.discover(duration)
             _LOGGER.debug("Bluetooth LE devices discovered = %s", devices)
         except RuntimeError as error:
@@ -65,6 +67,7 @@ def setup_scanner(hass, config, see):
 
     yaml_path = hass.config.path(YAML_DEVICES)
     duration = config.get(CONF_SCAN_DURATION)
+    ble_dev_id = config.get(CONF_BLUETOOTH_DEVICE)
     devs_to_track = []
     devs_donot_track = []