Ble tracker (#2810)

* Added Bluetooth Low Energy device tracker

* Added new file(s)

* Fixed pylint errors

* Remove traling zeros from device names

* recreated deleted file

* Added requirements

* Renamed to bluetooth_le tracker
Removed gattlib from tests
Minor code cleanup

* - fixed .coveragerc bug
- changed discovery algorithm, new devices will only be added if seen 5 times to make sure
  HA doesn't blow the database with devices just passing by

.coveragerc

@@ -113,6 +113,7 @@ omit =
     homeassistant/components/device_tracker/aruba.py
     homeassistant/components/device_tracker/asuswrt.py
     homeassistant/components/device_tracker/bluetooth_tracker.py
+    homeassistant/components/device_tracker/bluetooth_le_tracker.py
     homeassistant/components/device_tracker/bt_home_hub_5.py
     homeassistant/components/device_tracker/ddwrt.py
     homeassistant/components/device_tracker/fritz.py

homeassistant/components/device_tracker/bluetooth_le_tracker.py

@@ -0,0 +1,108 @@
+"""Tracking for bluetooth devices."""
+import logging
+from datetime import timedelta
+
+from homeassistant.helpers.event import track_point_in_utc_time
+from homeassistant.components.device_tracker import (
+    YAML_DEVICES,
+    CONF_TRACK_NEW,
+    CONF_SCAN_INTERVAL,
+    DEFAULT_SCAN_INTERVAL,
+    load_config,
+)
+import homeassistant.util as util
+import homeassistant.util.dt as dt_util
+
+_LOGGER = logging.getLogger(__name__)
+
+REQUIREMENTS = ['gattlib==0.20150805']
+
+BLE_PREFIX = 'BLE_'
+MIN_SEEN_NEW = 5
+
+
+def setup_scanner(hass, config, see):
+    """Setup the Bluetooth LE Scanner."""
+    # pylint: disable=import-error
+    from gattlib import DiscoveryService
+
+    new_devices = {}
+
+    def see_device(address, name, new_device=False):
+        """Mark a device as seen."""
+        if new_device:
+            if address in new_devices:
+                _LOGGER.debug("Seen %s %s times", address,
+                              new_devices[address])
+                new_devices[address] += 1
+                if new_devices[address] >= MIN_SEEN_NEW:
+                    _LOGGER.debug("Adding %s to tracked devices", address)
+                    devs_to_track.append(address)
+                else:
+                    return
+            else:
+                _LOGGER.debug("Seen %s for the first time", address)
+                new_devices[address] = 1
+                return
+
+        see(mac=BLE_PREFIX + address, host_name=name.strip("\x00"))
+
+    def discover_ble_devices():
+        """Discover Bluetooth LE devices."""
+        _LOGGER.debug("Discovering Bluetooth LE devices")
+        service = DiscoveryService()
+        devices = service.discover(10)
+        _LOGGER.debug("Bluetooth LE devices discovered = %s", devices)
+
+        return devices
+
+    yaml_path = hass.config.path(YAML_DEVICES)
+    devs_to_track = []
+    devs_donot_track = []
+
+    # Load all known devices.
+    # We just need the devices so set consider_home and home range
+    # to 0
+    for device in load_config(yaml_path, hass, 0, 0):
+        # check if device is a valid bluetooth device
+        if device.mac and device.mac[:3].upper() == BLE_PREFIX:
+            if device.track:
+                devs_to_track.append(device.mac[3:])
+            else:
+                devs_donot_track.append(device.mac[3:])
+
+    # if track new devices is true discover new devices
+    # on every scan.
+    track_new = util.convert(config.get(CONF_TRACK_NEW), bool,
+                             len(devs_to_track) == 0)
+    if not devs_to_track and not track_new:
+        _LOGGER.warning("No Bluetooth LE devices to track!")
+        return False
+
+    interval = util.convert(config.get(CONF_SCAN_INTERVAL), int,
+                            DEFAULT_SCAN_INTERVAL)
+
+    def update_ble(now):
+        """Lookup Bluetooth LE devices and update status."""
+        devs = discover_ble_devices()
+        for mac in devs_to_track:
+            _LOGGER.debug("Checking " + mac)
+            result = mac in devs
+            if not result:
+                # Could not lookup device name
+                continue
+            see_device(mac, devs[mac])
+
+        if track_new:
+            for address in devs:
+                if address not in devs_to_track and \
+                  address not in devs_donot_track:
+                    _LOGGER.info("Discovered Bluetooth LE device %s", address)
+                    see_device(address, devs[address], new_device=True)
+
+        track_point_in_utc_time(hass, update_ble,
+                                now + timedelta(seconds=interval))
+
+    update_ble(dt_util.utcnow())
+
+    return True

requirements_all.txt

@@ -85,6 +85,9 @@ freesms==0.1.0
 # homeassistant.components.conversation
 fuzzywuzzy==0.11.1
 
+# homeassistant.components.device_tracker.bluetooth_le_tracker
+# gattlib==0.20150805
+
 # homeassistant.components.notify.gntp
 gntp==1.0.3
 

script/gen_requirements_all.py

@@ -14,6 +14,7 @@ COMMENT_REQUIREMENTS = (
     'pybluez',
     'bluepy',
     'python-lirc',
+    'gattlib'
 )
 
 IGNORE_PACKAGES = (