diff --git a/homeassistant/components/fan/xiaomi_miio.py b/homeassistant/components/fan/xiaomi_miio.py
index 942aff4ec57..6938926a19b 100644
--- a/homeassistant/components/fan/xiaomi_miio.py
+++ b/homeassistant/components/fan/xiaomi_miio.py
@@ -29,7 +29,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
     vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
 })
 
-REQUIREMENTS = ['python-miio==0.3.5']
+REQUIREMENTS = ['python-miio==0.3.6']
 
 ATTR_TEMPERATURE = 'temperature'
 ATTR_HUMIDITY = 'humidity'
diff --git a/homeassistant/components/isy994.py b/homeassistant/components/isy994.py
index d85883e472a..df93bf51250 100644
--- a/homeassistant/components/isy994.py
+++ b/homeassistant/components/isy994.py
@@ -83,9 +83,9 @@ NODE_FILTERS = {
     },
     'fan': {
         'uom': [],
-        'states': ['on', 'off', 'low', 'medium', 'high'],
+        'states': ['off', 'low', 'medium', 'high'],
         'node_def_id': ['FanLincMotor'],
-        'insteon_type': ['1.46.']
+        'insteon_type': []
     },
     'cover': {
         'uom': ['97'],
@@ -99,7 +99,7 @@ NODE_FILTERS = {
         'node_def_id': ['DimmerLampSwitch', 'DimmerLampSwitch_ADV',
                         'DimmerSwitchOnly', 'DimmerSwitchOnly_ADV',
                         'DimmerLampOnly', 'BallastRelayLampSwitch',
-                        'BallastRelayLampSwitch_ADV', 'RelayLampSwitch',
+                        'BallastRelayLampSwitch_ADV',
                         'RemoteLinc2', 'RemoteLinc2_ADV'],
         'insteon_type': ['1.']
     },
@@ -431,7 +431,10 @@ class ISYDevice(Entity):
     def unique_id(self) -> str:
         """Get the unique identifier of the device."""
         # pylint: disable=protected-access
-        return self._node._id
+        if hasattr(self._node, '_id'):
+            return self._node._id
+
+        return None
 
     @property
     def name(self) -> str:
diff --git a/homeassistant/components/light/template.py b/homeassistant/components/light/template.py
index d4f2b93e6b5..cfd050f54f2 100644
--- a/homeassistant/components/light/template.py
+++ b/homeassistant/components/light/template.py
@@ -237,7 +237,6 @@ class LightTemplate(Light):
     @asyncio.coroutine
     def async_update(self):
         """Update the state from the template."""
-        print("ASYNC UPDATE")
         if self._template is not None:
             try:
                 state = self._template.async_render().lower()
@@ -262,7 +261,7 @@ class LightTemplate(Light):
                 self._state = None
 
             if 0 <= int(brightness) <= 255:
-                self._brightness = brightness
+                self._brightness = int(brightness)
             else:
                 _LOGGER.error(
                     'Received invalid brightness : %s' +
diff --git a/homeassistant/components/light/xiaomi_miio.py b/homeassistant/components/light/xiaomi_miio.py
index a3c5fa9f62e..f2d327575b1 100644
--- a/homeassistant/components/light/xiaomi_miio.py
+++ b/homeassistant/components/light/xiaomi_miio.py
@@ -30,7 +30,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
     vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
 })
 
-REQUIREMENTS = ['python-miio==0.3.5']
+REQUIREMENTS = ['python-miio==0.3.6']
 
 # The light does not accept cct values < 1
 CCT_MIN = 1
diff --git a/homeassistant/components/media_player/plex.py b/homeassistant/components/media_player/plex.py
index b2a89341cf0..dc38bb17dd3 100644
--- a/homeassistant/components/media_player/plex.py
+++ b/homeassistant/components/media_player/plex.py
@@ -370,7 +370,8 @@ class PlexClient(MediaPlayerDevice):
                 self._is_player_available = False
             self._media_position = self._session.viewOffset
             self._media_content_id = self._session.ratingKey
-            self._media_content_rating = self._session.contentRating
+            self._media_content_rating = getattr(
+                self._session, 'contentRating', None)
 
         self._set_player_state()
 
diff --git a/homeassistant/components/recorder/purge.py b/homeassistant/components/recorder/purge.py
index 06bd81c2309..3fffb521d5a 100644
--- a/homeassistant/components/recorder/purge.py
+++ b/homeassistant/components/recorder/purge.py
@@ -12,8 +12,7 @@ _LOGGER = logging.getLogger(__name__)
 def purge_old_data(instance, purge_days):
     """Purge events and states older than purge_days ago."""
     from .models import States, Events
-    from sqlalchemy import orm
-    from sqlalchemy.sql import exists
+    from sqlalchemy import func
 
     purge_before = dt_util.utcnow() - timedelta(days=purge_days)
 
@@ -21,18 +20,10 @@ def purge_old_data(instance, purge_days):
         # For each entity, the most recent state is protected from deletion
         # s.t. we can properly restore state even if the entity has not been
         # updated in a long time
-        states_alias = orm.aliased(States, name='StatesAlias')
-        protected_states = session.query(States.state_id, States.event_id)\
-            .filter(~exists()
-                    .where(States.entity_id ==
-                           states_alias.entity_id)
-                    .where(states_alias.last_updated >
-                           States.last_updated))\
-            .all()
+        protected_states = session.query(func.max(States.state_id)) \
+            .group_by(States.entity_id).all()
 
         protected_state_ids = tuple((state[0] for state in protected_states))
-        protected_event_ids = tuple((state[1] for state in protected_states
-                                     if state[1] is not None))
 
         deleted_rows = session.query(States) \
                               .filter((States.last_updated < purge_before)) \
@@ -45,6 +36,13 @@ def purge_old_data(instance, purge_days):
         # Otherwise, if the SQL server has "ON DELETE CASCADE" as default, it
         # will delete the protected state when deleting its associated
         # event. Also, we would be producing NULLed foreign keys otherwise.
+        protected_events = session.query(States.event_id) \
+            .filter(States.state_id.in_(protected_state_ids)) \
+            .filter(States.event_id.isnot(None)) \
+            .all()
+
+        protected_event_ids = tuple((state[0] for state in protected_events))
+
         deleted_rows = session.query(Events) \
             .filter((Events.time_fired < purge_before)) \
             .filter(~Events.event_id.in_(
diff --git a/homeassistant/components/remote/xiaomi_miio.py b/homeassistant/components/remote/xiaomi_miio.py
index 32fde57b61a..aa9f0c95a7c 100644
--- a/homeassistant/components/remote/xiaomi_miio.py
+++ b/homeassistant/components/remote/xiaomi_miio.py
@@ -21,7 +21,7 @@ from homeassistant.const import (
 import homeassistant.helpers.config_validation as cv
 from homeassistant.util.dt import utcnow
 
-REQUIREMENTS = ['python-miio==0.3.5']
+REQUIREMENTS = ['python-miio==0.3.6']
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/homeassistant/components/sensor/sql.py b/homeassistant/components/sensor/sql.py
index 99da8c3c680..395c082f9d2 100644
--- a/homeassistant/components/sensor/sql.py
+++ b/homeassistant/components/sensor/sql.py
@@ -126,6 +126,8 @@ class SQLSensor(Entity):
         except sqlalchemy.exc.SQLAlchemyError as err:
             _LOGGER.error("Error executing query %s: %s", self._query, err)
             return
+        finally:
+            sess.close()
 
         for res in result:
             _LOGGER.debug(res.items())
@@ -141,5 +143,3 @@ class SQLSensor(Entity):
                 data, None)
         else:
             self._state = data
-
-        sess.close()
diff --git a/homeassistant/components/sensor/yr.py b/homeassistant/components/sensor/yr.py
index 71a4e60e8a6..3f9579c1f13 100644
--- a/homeassistant/components/sensor/yr.py
+++ b/homeassistant/components/sensor/yr.py
@@ -7,7 +7,6 @@ https://home-assistant.io/components/sensor.yr/
 import asyncio
 import logging
 
-from datetime import timedelta
 from random import randrange
 from xml.parsers.expat import ExpatError
 
@@ -22,16 +21,17 @@ from homeassistant.const import (
     ATTR_ATTRIBUTION, CONF_NAME)
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.helpers.entity import Entity
-from homeassistant.helpers.event import (
-    async_track_point_in_utc_time, async_track_utc_time_change)
+from homeassistant.helpers.event import (async_track_utc_time_change,
+                                         async_call_later)
 from homeassistant.util import dt as dt_util
 
 REQUIREMENTS = ['xmltodict==0.11.0']
 
 _LOGGER = logging.getLogger(__name__)
 
-CONF_ATTRIBUTION = "Weather forecast from yr.no, delivered by the Norwegian " \
-                   "Meteorological Institute and the NRK."
+CONF_ATTRIBUTION = "Weather forecast from met.no, delivered " \
+                   "by the Norwegian Meteorological Institute."
+# https://api.met.no/license_data.html
 
 SENSOR_TYPES = {
     'symbol': ['Symbol', None],
@@ -91,11 +91,8 @@ def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
     async_add_devices(dev)
 
     weather = YrData(hass, coordinates, forecast, dev)
-    # Update weather on the hour, spread seconds
-    async_track_utc_time_change(
-        hass, weather.async_update, minute=randrange(1, 10),
-        second=randrange(0, 59))
-    yield from weather.async_update()
+    async_track_utc_time_change(hass, weather.updating_devices, minute=31)
+    yield from weather.fetching_data()
 
 
 class YrSensor(Entity):
@@ -153,50 +150,49 @@ class YrData(object):
         self._url = 'https://aa015h6buqvih86i1.api.met.no/'\
                     'weatherapi/locationforecast/1.9/'
         self._urlparams = coordinates
-        self._nextrun = None
         self._forecast = forecast
         self.devices = devices
         self.data = {}
         self.hass = hass
 
     @asyncio.coroutine
-    def async_update(self, *_):
+    def fetching_data(self, *_):
         """Get the latest data from yr.no."""
         import xmltodict
 
         def try_again(err: str):
-            """Retry in 15 minutes."""
-            _LOGGER.warning("Retrying in 15 minutes: %s", err)
-            self._nextrun = None
-            nxt = dt_util.utcnow() + timedelta(minutes=15)
-            if nxt.minute >= 15:
-                async_track_point_in_utc_time(self.hass, self.async_update,
-                                              nxt)
-
-        if self._nextrun is None or dt_util.utcnow() >= self._nextrun:
-            try:
-                websession = async_get_clientsession(self.hass)
-                with async_timeout.timeout(10, loop=self.hass.loop):
-                    resp = yield from websession.get(
-                        self._url, params=self._urlparams)
-                if resp.status != 200:
-                    try_again('{} returned {}'.format(resp.url, resp.status))
-                    return
-                text = yield from resp.text()
-
-            except (asyncio.TimeoutError, aiohttp.ClientError) as err:
-                try_again(err)
+            """Retry in 15 to 20 minutes."""
+            minutes = 15 + randrange(6)
+            _LOGGER.error("Retrying in %i minutes: %s", minutes, err)
+            async_call_later(self.hass, minutes*60, self.fetching_data)
+        try:
+            websession = async_get_clientsession(self.hass)
+            with async_timeout.timeout(10, loop=self.hass.loop):
+                resp = yield from websession.get(
+                    self._url, params=self._urlparams)
+            if resp.status != 200:
+                try_again('{} returned {}'.format(resp.url, resp.status))
                 return
+            text = yield from resp.text()
 
-            try:
-                self.data = xmltodict.parse(text)['weatherdata']
-                model = self.data['meta']['model']
-                if '@nextrun' not in model:
-                    model = model[0]
-                self._nextrun = dt_util.parse_datetime(model['@nextrun'])
-            except (ExpatError, IndexError) as err:
-                try_again(err)
-                return
+        except (asyncio.TimeoutError, aiohttp.ClientError) as err:
+            try_again(err)
+            return
+
+        try:
+            self.data = xmltodict.parse(text)['weatherdata']
+        except (ExpatError, IndexError) as err:
+            try_again(err)
+            return
+
+        yield from self.updating_devices()
+        async_call_later(self.hass, 60*60, self.fetching_data)
+
+    @asyncio.coroutine
+    def updating_devices(self, *_):
+        """Find the current data from self.data."""
+        if not self.data:
+            return
 
         now = dt_util.utcnow()
         forecast_time = now + dt_util.dt.timedelta(hours=self._forecast)
diff --git a/homeassistant/components/switch/xiaomi_miio.py b/homeassistant/components/switch/xiaomi_miio.py
index 87871079a9c..ad71b3944cf 100644
--- a/homeassistant/components/switch/xiaomi_miio.py
+++ b/homeassistant/components/switch/xiaomi_miio.py
@@ -25,7 +25,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
     vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
 })
 
-REQUIREMENTS = ['python-miio==0.3.5']
+REQUIREMENTS = ['python-miio==0.3.6']
 
 ATTR_POWER = 'power'
 ATTR_TEMPERATURE = 'temperature'
diff --git a/homeassistant/components/vacuum/xiaomi_miio.py b/homeassistant/components/vacuum/xiaomi_miio.py
index d64f7a754ee..bcfb3b6738e 100644
--- a/homeassistant/components/vacuum/xiaomi_miio.py
+++ b/homeassistant/components/vacuum/xiaomi_miio.py
@@ -19,7 +19,7 @@ from homeassistant.const import (
     ATTR_ENTITY_ID, CONF_HOST, CONF_NAME, CONF_TOKEN, STATE_OFF, STATE_ON)
 import homeassistant.helpers.config_validation as cv
 
-REQUIREMENTS = ['python-miio==0.3.5']
+REQUIREMENTS = ['python-miio==0.3.6']
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 917292648c9..eb90a19c778 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -2,7 +2,7 @@
 """Constants used by Home Assistant components."""
 MAJOR_VERSION = 0
 MINOR_VERSION = 63
-PATCH_VERSION = '2'
+PATCH_VERSION = '3'
 __short_version__ = '{}.{}'.format(MAJOR_VERSION, MINOR_VERSION)
 __version__ = '{}.{}'.format(__short_version__, PATCH_VERSION)
 REQUIRED_PYTHON_VER = (3, 4, 2)
diff --git a/requirements_all.txt b/requirements_all.txt
index 6c1282ce8a7..19e6f5cb6e6 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -922,7 +922,7 @@ python-juicenet==0.0.5
 # homeassistant.components.remote.xiaomi_miio
 # homeassistant.components.switch.xiaomi_miio
 # homeassistant.components.vacuum.xiaomi_miio
-python-miio==0.3.5
+python-miio==0.3.6
 
 # homeassistant.components.media_player.mpd
 python-mpd2==0.5.5
diff --git a/tests/components/light/test_template.py b/tests/components/light/test_template.py
index aaac0617590..2d45ad1bf94 100644
--- a/tests/components/light/test_template.py
+++ b/tests/components/light/test_template.py
@@ -586,7 +586,7 @@ class TestTemplateLight:
         state = self.hass.states.get('light.test_template_light')
         assert state is not None
 
-        assert state.attributes.get('brightness') == '42'
+        assert state.attributes.get('brightness') == 42
 
     def test_friendly_name(self):
         """Test the accessibility of the friendly_name attribute."""