diff --git a/homeassistant/components/automation/event.py b/homeassistant/components/automation/event.py
index 90baeaded14..6f750245df9 100644
--- a/homeassistant/components/automation/event.py
+++ b/homeassistant/components/automation/event.py
@@ -31,16 +31,17 @@ def async_trigger(hass, config, action):
     event_type = config.get(CONF_EVENT_TYPE)
     event_data_schema = vol.Schema(
         config.get(CONF_EVENT_DATA),
-        extra=vol.ALLOW_EXTRA)
+        extra=vol.ALLOW_EXTRA) if config.get(CONF_EVENT_DATA) else None
 
     @callback
     def handle_event(event):
         """Listen for events and calls the action when data matches."""
-        try:
-            event_data_schema(event.data)
-        except vol.Invalid:
-            # If event data doesn't match requested schema, skip event
-            return
+        if event_data_schema:
+            try:
+                event_data_schema(event.data)
+            except vol.Invalid:
+                # If event data doesn't match requested schema, skip event
+                return
 
         hass.async_run_job(action, {
             'trigger': {
diff --git a/homeassistant/components/sensor/xiaomi_aqara.py b/homeassistant/components/sensor/xiaomi_aqara.py
index f375f1ba9ad..7b771e8c785 100644
--- a/homeassistant/components/sensor/xiaomi_aqara.py
+++ b/homeassistant/components/sensor/xiaomi_aqara.py
@@ -75,8 +75,6 @@ class XiaomiSensor(XiaomiDevice):
             return False
         elif self._data_key == 'humidity' and (value <= 0 or value > 100):
             return False
-        elif self._data_key == 'illumination' and value == 0:
-            return False
         elif self._data_key == 'pressure' and value == 0:
             return False
         self._state = round(value, 2)
diff --git a/homeassistant/components/switch/tplink.py b/homeassistant/components/switch/tplink.py
index df0050ff979..8fa6493862c 100644
--- a/homeassistant/components/switch/tplink.py
+++ b/homeassistant/components/switch/tplink.py
@@ -45,7 +45,7 @@ class SmartPlugSwitch(SwitchDevice):
     def __init__(self, smartplug, name):
         """Initialize the switch."""
         self.smartplug = smartplug
-        self._name = None
+        self._name = name
         self._state = None
         # Set up emeter cache
         self._emeter_params = {}
diff --git a/homeassistant/const.py b/homeassistant/const.py
index ca438f35102..3a2ee824dda 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -2,7 +2,7 @@
 """Constants used by Home Assistant components."""
 MAJOR_VERSION = 0
 MINOR_VERSION = 56
-PATCH_VERSION = '1'
+PATCH_VERSION = '2'
 __short_version__ = '{}.{}'.format(MAJOR_VERSION, MINOR_VERSION)
 __version__ = '{}.{}'.format(__short_version__, PATCH_VERSION)
 REQUIRED_PYTHON_VER = (3, 4, 2)