diff --git a/.coveragerc b/.coveragerc
index e6a1c752f87..161b62c1896 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -448,8 +448,11 @@ omit =
     homeassistant/components/zha/sensor.py
     homeassistant/components/zha/switch.py
     homeassistant/components/zha/api.py
-    homeassistant/components/zha/entities/*
-    homeassistant/components/zha/helpers.py
+    homeassistant/components/zha/entity.py
+    homeassistant/components/zha/device_entity.py
+    homeassistant/components/zha/core/helpers.py
+    homeassistant/components/zha/core/const.py
+    homeassistant/components/zha/core/listeners.py
     homeassistant/components/*/zha.py
 
     homeassistant/components/zigbee.py
diff --git a/homeassistant/components/zha/__init__.py b/homeassistant/components/zha/__init__.py
index 335295b2c2c..486274a4163 100644
--- a/homeassistant/components/zha/__init__.py
+++ b/homeassistant/components/zha/__init__.py
@@ -22,8 +22,8 @@ from . import config_flow  # noqa  # pylint: disable=unused-import
 from . import const as zha_const
 from .event import ZhaEvent, ZhaRelayEvent
 from . import api
-from .helpers import convert_ieee
-from .entities import ZhaDeviceEntity
+from .core.helpers import convert_ieee
+from .device_entity import ZhaDeviceEntity
 from .const import (
     COMPONENTS, CONF_BAUDRATE, CONF_DATABASE, CONF_DEVICE_CONFIG,
     CONF_RADIO_TYPE, CONF_USB_PATH, DATA_ZHA, DATA_ZHA_BRIDGE_ID,
diff --git a/homeassistant/components/zha/api.py b/homeassistant/components/zha/api.py
index 308c221bf2f..0312a40967f 100644
--- a/homeassistant/components/zha/api.py
+++ b/homeassistant/components/zha/api.py
@@ -11,7 +11,7 @@ import voluptuous as vol
 from homeassistant.components import websocket_api
 from homeassistant.const import ATTR_ENTITY_ID
 import homeassistant.helpers.config_validation as cv
-from .entities import ZhaDeviceEntity
+from .device_entity import ZhaDeviceEntity
 from .const import (
     DOMAIN, ATTR_CLUSTER_ID, ATTR_CLUSTER_TYPE, ATTR_ATTRIBUTE, ATTR_VALUE,
     ATTR_MANUFACTURER, ATTR_COMMAND, ATTR_COMMAND_TYPE, ATTR_ARGS, IN, OUT,
diff --git a/homeassistant/components/zha/binary_sensor.py b/homeassistant/components/zha/binary_sensor.py
index fce9376700e..d0f23ff3dd2 100644
--- a/homeassistant/components/zha/binary_sensor.py
+++ b/homeassistant/components/zha/binary_sensor.py
@@ -10,11 +10,11 @@ from homeassistant.components.binary_sensor import DOMAIN, BinarySensorDevice
 from homeassistant.const import STATE_ON
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.restore_state import RestoreEntity
-from . import helpers
-from .const import (
+from .core import helpers
+from .core.const import (
     DATA_ZHA, DATA_ZHA_DISPATCHERS, REPORT_CONFIG_IMMEDIATE, ZHA_DISCOVERY_NEW)
-from .entities import ZhaEntity
-from .entities.listeners import (
+from .entity import ZhaEntity
+from .core.listeners import (
     OnOffListener, LevelListener
 )
 
diff --git a/homeassistant/components/zha/config_flow.py b/homeassistant/components/zha/config_flow.py
index 1c903ec3056..d995a2179fe 100644
--- a/homeassistant/components/zha/config_flow.py
+++ b/homeassistant/components/zha/config_flow.py
@@ -6,9 +6,9 @@ import voluptuous as vol
 
 from homeassistant import config_entries
 
-from .const import (
+from .core.const import (
     CONF_RADIO_TYPE, CONF_USB_PATH, DEFAULT_DATABASE_NAME, DOMAIN, RadioType)
-from .helpers import check_zigpy_connection
+from .core.helpers import check_zigpy_connection
 
 
 @config_entries.HANDLERS.register(DOMAIN)
diff --git a/homeassistant/components/zha/const.py b/homeassistant/components/zha/const.py
index 47c3982c5d6..abcd17a0461 100644
--- a/homeassistant/components/zha/const.py
+++ b/homeassistant/components/zha/const.py
@@ -1,95 +1,8 @@
-"""All constants related to the ZHA component."""
-import enum
+"""
+Backwards compatible constants bridge.
 
-DOMAIN = 'zha'
-
-BAUD_RATES = [
-    2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200, 128000, 256000
-]
-
-DATA_ZHA = 'zha'
-DATA_ZHA_CONFIG = 'config'
-DATA_ZHA_BRIDGE_ID = 'zha_bridge_id'
-DATA_ZHA_RADIO = 'zha_radio'
-DATA_ZHA_DISPATCHERS = 'zha_dispatchers'
-DATA_ZHA_CORE_COMPONENT = 'zha_core_component'
-DATA_ZHA_CORE_EVENTS = 'zha_core_events'
-ZHA_DISCOVERY_NEW = 'zha_discovery_new_{}'
-
-COMPONENTS = [
-    'binary_sensor',
-    'fan',
-    'light',
-    'sensor',
-    'switch',
-]
-
-CONF_BAUDRATE = 'baudrate'
-CONF_DATABASE = 'database_path'
-CONF_DEVICE_CONFIG = 'device_config'
-CONF_RADIO_TYPE = 'radio_type'
-CONF_USB_PATH = 'usb_path'
-DATA_DEVICE_CONFIG = 'zha_device_config'
-ENABLE_QUIRKS = 'enable_quirks'
-
-DEFAULT_RADIO_TYPE = 'ezsp'
-DEFAULT_BAUDRATE = 57600
-DEFAULT_DATABASE_NAME = 'zigbee.db'
-
-ATTR_CLUSTER_ID = 'cluster_id'
-ATTR_CLUSTER_TYPE = 'cluster_type'
-ATTR_ATTRIBUTE = 'attribute'
-ATTR_VALUE = 'value'
-ATTR_MANUFACTURER = 'manufacturer'
-ATTR_COMMAND = 'command'
-ATTR_COMMAND_TYPE = 'command_type'
-ATTR_ARGS = 'args'
-
-IN = 'in'
-OUT = 'out'
-CLIENT_COMMANDS = 'client_commands'
-SERVER_COMMANDS = 'server_commands'
-SERVER = 'server'
-
-
-class RadioType(enum.Enum):
-    """Possible options for radio type."""
-
-    ezsp = 'ezsp'
-    xbee = 'xbee'
-    deconz = 'deconz'
-
-    @classmethod
-    def list(cls):
-        """Return list of enum's values."""
-        return [e.value for e in RadioType]
-
-
-DISCOVERY_KEY = 'zha_discovery_info'
-DEVICE_CLASS = {}
-SINGLE_INPUT_CLUSTER_DEVICE_CLASS = {}
-SINGLE_OUTPUT_CLUSTER_DEVICE_CLASS = {}
-CUSTOM_CLUSTER_MAPPINGS = {}
-COMPONENT_CLUSTERS = {}
-EVENTABLE_CLUSTERS = []
-
-REPORT_CONFIG_MAX_INT = 900
-REPORT_CONFIG_MAX_INT_BATTERY_SAVE = 10800
-REPORT_CONFIG_MIN_INT = 30
-REPORT_CONFIG_MIN_INT_ASAP = 1
-REPORT_CONFIG_MIN_INT_IMMEDIATE = 0
-REPORT_CONFIG_MIN_INT_OP = 5
-REPORT_CONFIG_MIN_INT_BATTERY_SAVE = 3600
-REPORT_CONFIG_RPT_CHANGE = 1
-REPORT_CONFIG_DEFAULT = (REPORT_CONFIG_MIN_INT, REPORT_CONFIG_MAX_INT,
-                         REPORT_CONFIG_RPT_CHANGE)
-REPORT_CONFIG_ASAP = (REPORT_CONFIG_MIN_INT_ASAP, REPORT_CONFIG_MAX_INT,
-                      REPORT_CONFIG_RPT_CHANGE)
-REPORT_CONFIG_BATTERY_SAVE = (REPORT_CONFIG_MIN_INT_BATTERY_SAVE,
-                              REPORT_CONFIG_MAX_INT,
-                              REPORT_CONFIG_RPT_CHANGE)
-REPORT_CONFIG_IMMEDIATE = (REPORT_CONFIG_MIN_INT_IMMEDIATE,
-                           REPORT_CONFIG_MAX_INT,
-                           REPORT_CONFIG_RPT_CHANGE)
-REPORT_CONFIG_OP = (REPORT_CONFIG_MIN_INT_OP, REPORT_CONFIG_MAX_INT,
-                    REPORT_CONFIG_RPT_CHANGE)
+For more details on this platform, please refer to the documentation
+at https://home-assistant.io/components/fan.zha/
+"""
+# pylint: disable=W0614,W0401
+from .core.const import *  # noqa: F401,F403
diff --git a/homeassistant/components/zha/entities/__init__.py b/homeassistant/components/zha/core/__init__.py
similarity index 50%
rename from homeassistant/components/zha/entities/__init__.py
rename to homeassistant/components/zha/core/__init__.py
index c3c3ea163ed..47e6ed2b0ee 100644
--- a/homeassistant/components/zha/entities/__init__.py
+++ b/homeassistant/components/zha/core/__init__.py
@@ -1,10 +1,6 @@
 """
-Entities for Zigbee Home Automation.
+Core module for Zigbee Home Automation.
 
 For more details about this component, please refer to the documentation at
 https://home-assistant.io/components/zha/
 """
-
-# flake8: noqa
-from .device_entity import ZhaDeviceEntity
-from .entity import ZhaEntity
diff --git a/homeassistant/components/zha/core/const.py b/homeassistant/components/zha/core/const.py
new file mode 100644
index 00000000000..47c3982c5d6
--- /dev/null
+++ b/homeassistant/components/zha/core/const.py
@@ -0,0 +1,95 @@
+"""All constants related to the ZHA component."""
+import enum
+
+DOMAIN = 'zha'
+
+BAUD_RATES = [
+    2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200, 128000, 256000
+]
+
+DATA_ZHA = 'zha'
+DATA_ZHA_CONFIG = 'config'
+DATA_ZHA_BRIDGE_ID = 'zha_bridge_id'
+DATA_ZHA_RADIO = 'zha_radio'
+DATA_ZHA_DISPATCHERS = 'zha_dispatchers'
+DATA_ZHA_CORE_COMPONENT = 'zha_core_component'
+DATA_ZHA_CORE_EVENTS = 'zha_core_events'
+ZHA_DISCOVERY_NEW = 'zha_discovery_new_{}'
+
+COMPONENTS = [
+    'binary_sensor',
+    'fan',
+    'light',
+    'sensor',
+    'switch',
+]
+
+CONF_BAUDRATE = 'baudrate'
+CONF_DATABASE = 'database_path'
+CONF_DEVICE_CONFIG = 'device_config'
+CONF_RADIO_TYPE = 'radio_type'
+CONF_USB_PATH = 'usb_path'
+DATA_DEVICE_CONFIG = 'zha_device_config'
+ENABLE_QUIRKS = 'enable_quirks'
+
+DEFAULT_RADIO_TYPE = 'ezsp'
+DEFAULT_BAUDRATE = 57600
+DEFAULT_DATABASE_NAME = 'zigbee.db'
+
+ATTR_CLUSTER_ID = 'cluster_id'
+ATTR_CLUSTER_TYPE = 'cluster_type'
+ATTR_ATTRIBUTE = 'attribute'
+ATTR_VALUE = 'value'
+ATTR_MANUFACTURER = 'manufacturer'
+ATTR_COMMAND = 'command'
+ATTR_COMMAND_TYPE = 'command_type'
+ATTR_ARGS = 'args'
+
+IN = 'in'
+OUT = 'out'
+CLIENT_COMMANDS = 'client_commands'
+SERVER_COMMANDS = 'server_commands'
+SERVER = 'server'
+
+
+class RadioType(enum.Enum):
+    """Possible options for radio type."""
+
+    ezsp = 'ezsp'
+    xbee = 'xbee'
+    deconz = 'deconz'
+
+    @classmethod
+    def list(cls):
+        """Return list of enum's values."""
+        return [e.value for e in RadioType]
+
+
+DISCOVERY_KEY = 'zha_discovery_info'
+DEVICE_CLASS = {}
+SINGLE_INPUT_CLUSTER_DEVICE_CLASS = {}
+SINGLE_OUTPUT_CLUSTER_DEVICE_CLASS = {}
+CUSTOM_CLUSTER_MAPPINGS = {}
+COMPONENT_CLUSTERS = {}
+EVENTABLE_CLUSTERS = []
+
+REPORT_CONFIG_MAX_INT = 900
+REPORT_CONFIG_MAX_INT_BATTERY_SAVE = 10800
+REPORT_CONFIG_MIN_INT = 30
+REPORT_CONFIG_MIN_INT_ASAP = 1
+REPORT_CONFIG_MIN_INT_IMMEDIATE = 0
+REPORT_CONFIG_MIN_INT_OP = 5
+REPORT_CONFIG_MIN_INT_BATTERY_SAVE = 3600
+REPORT_CONFIG_RPT_CHANGE = 1
+REPORT_CONFIG_DEFAULT = (REPORT_CONFIG_MIN_INT, REPORT_CONFIG_MAX_INT,
+                         REPORT_CONFIG_RPT_CHANGE)
+REPORT_CONFIG_ASAP = (REPORT_CONFIG_MIN_INT_ASAP, REPORT_CONFIG_MAX_INT,
+                      REPORT_CONFIG_RPT_CHANGE)
+REPORT_CONFIG_BATTERY_SAVE = (REPORT_CONFIG_MIN_INT_BATTERY_SAVE,
+                              REPORT_CONFIG_MAX_INT,
+                              REPORT_CONFIG_RPT_CHANGE)
+REPORT_CONFIG_IMMEDIATE = (REPORT_CONFIG_MIN_INT_IMMEDIATE,
+                           REPORT_CONFIG_MAX_INT,
+                           REPORT_CONFIG_RPT_CHANGE)
+REPORT_CONFIG_OP = (REPORT_CONFIG_MIN_INT_OP, REPORT_CONFIG_MAX_INT,
+                    REPORT_CONFIG_RPT_CHANGE)
diff --git a/homeassistant/components/zha/helpers.py b/homeassistant/components/zha/core/helpers.py
similarity index 100%
rename from homeassistant/components/zha/helpers.py
rename to homeassistant/components/zha/core/helpers.py
diff --git a/homeassistant/components/zha/entities/listeners.py b/homeassistant/components/zha/core/listeners.py
similarity index 100%
rename from homeassistant/components/zha/entities/listeners.py
rename to homeassistant/components/zha/core/listeners.py
diff --git a/homeassistant/components/zha/entities/device_entity.py b/homeassistant/components/zha/device_entity.py
similarity index 100%
rename from homeassistant/components/zha/entities/device_entity.py
rename to homeassistant/components/zha/device_entity.py
diff --git a/homeassistant/components/zha/entities/entity.py b/homeassistant/components/zha/entity.py
similarity index 99%
rename from homeassistant/components/zha/entities/entity.py
rename to homeassistant/components/zha/entity.py
index 8f8c8e58e05..e112e32d592 100644
--- a/homeassistant/components/zha/entities/entity.py
+++ b/homeassistant/components/zha/entity.py
@@ -13,11 +13,11 @@ from homeassistant.core import callback
 from homeassistant.helpers import entity
 from homeassistant.helpers.device_registry import CONNECTION_ZIGBEE
 from homeassistant.util import slugify
-from ..const import (
+from .core.const import (
     DATA_ZHA, DATA_ZHA_BRIDGE_ID, DOMAIN, ATTR_CLUSTER_ID, ATTR_ATTRIBUTE,
     ATTR_VALUE, ATTR_MANUFACTURER, ATTR_COMMAND, SERVER, ATTR_COMMAND_TYPE,
     ATTR_ARGS, IN, OUT, CLIENT_COMMANDS, SERVER_COMMANDS)
-from ..helpers import bind_configure_reporting
+from .core.helpers import bind_configure_reporting
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/homeassistant/components/zha/fan.py b/homeassistant/components/zha/fan.py
index 630ab3f7bb9..f6dbef50923 100644
--- a/homeassistant/components/zha/fan.py
+++ b/homeassistant/components/zha/fan.py
@@ -10,10 +10,10 @@ from homeassistant.components.fan import (
     DOMAIN, SPEED_HIGH, SPEED_LOW, SPEED_MEDIUM, SPEED_OFF, SUPPORT_SET_SPEED,
     FanEntity)
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
-from . import helpers
-from .const import (
+from .core import helpers
+from .core.const import (
     DATA_ZHA, DATA_ZHA_DISPATCHERS, REPORT_CONFIG_OP, ZHA_DISCOVERY_NEW)
-from .entities import ZhaEntity
+from .entity import ZhaEntity
 
 DEPENDENCIES = ['zha']
 
diff --git a/homeassistant/components/zha/light.py b/homeassistant/components/zha/light.py
index 766608b35b1..49a09112b31 100644
--- a/homeassistant/components/zha/light.py
+++ b/homeassistant/components/zha/light.py
@@ -9,12 +9,12 @@ import logging
 from homeassistant.components import light
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 import homeassistant.util.color as color_util
-from . import helpers
-from .const import (
+from .core import helpers
+from .core.const import (
     DATA_ZHA, DATA_ZHA_DISPATCHERS, REPORT_CONFIG_ASAP, REPORT_CONFIG_DEFAULT,
     REPORT_CONFIG_IMMEDIATE, ZHA_DISCOVERY_NEW)
-from .entities import ZhaEntity
-from .entities.listeners import (
+from .entity import ZhaEntity
+from .core.listeners import (
     OnOffListener, LevelListener
 )
 
diff --git a/homeassistant/components/zha/sensor.py b/homeassistant/components/zha/sensor.py
index dabbcb79815..ae45fad0826 100644
--- a/homeassistant/components/zha/sensor.py
+++ b/homeassistant/components/zha/sensor.py
@@ -10,11 +10,11 @@ from homeassistant.components.sensor import DOMAIN
 from homeassistant.const import TEMP_CELSIUS
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.util.temperature import convert as convert_temperature
-from . import helpers
-from .const import (
+from .core import helpers
+from .core.const import (
     DATA_ZHA, DATA_ZHA_DISPATCHERS, REPORT_CONFIG_MAX_INT,
     REPORT_CONFIG_MIN_INT, REPORT_CONFIG_RPT_CHANGE, ZHA_DISCOVERY_NEW)
-from .entities import ZhaEntity
+from .entity import ZhaEntity
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/homeassistant/components/zha/switch.py b/homeassistant/components/zha/switch.py
index 793da4e1e3a..09c20acd088 100644
--- a/homeassistant/components/zha/switch.py
+++ b/homeassistant/components/zha/switch.py
@@ -8,10 +8,10 @@ import logging
 
 from homeassistant.components.switch import DOMAIN, SwitchDevice
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
-from . import helpers
-from .const import (
+from .core import helpers
+from .core.const import (
     DATA_ZHA, DATA_ZHA_DISPATCHERS, REPORT_CONFIG_IMMEDIATE, ZHA_DISCOVERY_NEW)
-from .entities import ZhaEntity
+from .entity import ZhaEntity
 
 _LOGGER = logging.getLogger(__name__)