diff --git a/homeassistant/components/binary_sensor/mysensors.py b/homeassistant/components/binary_sensor/mysensors.py
index 767ed858ec7..4b83f0c8f2d 100644
--- a/homeassistant/components/binary_sensor/mysensors.py
+++ b/homeassistant/components/binary_sensor/mysensors.py
@@ -4,62 +4,27 @@ Support for MySensors binary sensors.
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/binary_sensor.mysensors/
 """
-import logging
-
 from homeassistant.components import mysensors
-from homeassistant.components.binary_sensor import (DEVICE_CLASSES,
+from homeassistant.components.binary_sensor import (DEVICE_CLASSES, DOMAIN,
                                                     BinarySensorDevice)
 from homeassistant.const import STATE_ON
 
-_LOGGER = logging.getLogger(__name__)
-DEPENDENCIES = []
-
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """Set up the MySensors platform for sensors."""
-    # Only act if loaded via mysensors by discovery event.
-    # Otherwise gateway is not setup.
-    if discovery_info is None:
-        return
-
-    gateways = hass.data.get(mysensors.MYSENSORS_GATEWAYS)
-    if not gateways:
-        return
-
-    for gateway in gateways:
-        # Define the S_TYPES and V_TYPES that the platform should handle as
-        # states. Map them in a dict of lists.
-        pres = gateway.const.Presentation
-        set_req = gateway.const.SetReq
-        map_sv_types = {
-            pres.S_DOOR: [set_req.V_TRIPPED],
-            pres.S_MOTION: [set_req.V_TRIPPED],
-            pres.S_SMOKE: [set_req.V_TRIPPED],
-        }
-        if float(gateway.protocol_version) >= 1.5:
-            map_sv_types.update({
-                pres.S_SPRINKLER: [set_req.V_TRIPPED],
-                pres.S_WATER_LEAK: [set_req.V_TRIPPED],
-                pres.S_SOUND: [set_req.V_TRIPPED],
-                pres.S_VIBRATION: [set_req.V_TRIPPED],
-                pres.S_MOISTURE: [set_req.V_TRIPPED],
-            })
-
-        devices = {}
-        gateway.platform_callbacks.append(mysensors.pf_callback_factory(
-            map_sv_types, devices, MySensorsBinarySensor, add_devices))
+    """Setup the mysensors platform for binary sensors."""
+    mysensors.setup_mysensors_platform(
+        hass, DOMAIN, discovery_info, MySensorsBinarySensor,
+        add_devices=add_devices)
 
 
 class MySensorsBinarySensor(
-        mysensors.MySensorsDeviceEntity, BinarySensorDevice):
+        mysensors.MySensorsEntity, BinarySensorDevice):
     """Represent the value of a MySensors Binary Sensor child node."""
 
     @property
     def is_on(self):
         """Return True if the binary sensor is on."""
-        if self.value_type in self._values:
-            return self._values[self.value_type] == STATE_ON
-        return False
+        return self._values.get(self.value_type) == STATE_ON
 
     @property
     def device_class(self):
diff --git a/homeassistant/components/climate/mysensors.py b/homeassistant/components/climate/mysensors.py
index 82ed8a94e2b..d4316c2cfba 100755
--- a/homeassistant/components/climate/mysensors.py
+++ b/homeassistant/components/climate/mysensors.py
@@ -4,15 +4,11 @@ MySensors platform that offers a Climate (MySensors-HVAC) component.
 For more details about this platform, please refer to the documentation
 https://home-assistant.io/components/climate.mysensors/
 """
-import logging
-
 from homeassistant.components import mysensors
 from homeassistant.components.climate import (
-    STATE_COOL, STATE_HEAT, STATE_OFF, STATE_AUTO, ClimateDevice,
-    ATTR_TARGET_TEMP_HIGH, ATTR_TARGET_TEMP_LOW)
-from homeassistant.const import TEMP_CELSIUS, TEMP_FAHRENHEIT, ATTR_TEMPERATURE
-
-_LOGGER = logging.getLogger(__name__)
+    ATTR_TARGET_TEMP_HIGH, ATTR_TARGET_TEMP_LOW, DOMAIN, STATE_AUTO,
+    STATE_COOL, STATE_HEAT, STATE_OFF, ClimateDevice)
+from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS, TEMP_FAHRENHEIT
 
 DICT_HA_TO_MYS = {
     STATE_AUTO: 'AutoChangeOver',
@@ -29,28 +25,12 @@ DICT_MYS_TO_HA = {
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """Set up the mysensors climate."""
-    if discovery_info is None:
-        return
-
-    gateways = hass.data.get(mysensors.MYSENSORS_GATEWAYS)
-    if not gateways:
-        return
-
-    for gateway in gateways:
-        if float(gateway.protocol_version) < 1.5:
-            continue
-        pres = gateway.const.Presentation
-        set_req = gateway.const.SetReq
-        map_sv_types = {
-            pres.S_HVAC: [set_req.V_HVAC_FLOW_STATE],
-        }
-        devices = {}
-        gateway.platform_callbacks.append(mysensors.pf_callback_factory(
-            map_sv_types, devices, MySensorsHVAC, add_devices))
+    """Setup the mysensors climate."""
+    mysensors.setup_mysensors_platform(
+        hass, DOMAIN, discovery_info, MySensorsHVAC, add_devices=add_devices)
 
 
-class MySensorsHVAC(mysensors.MySensorsDeviceEntity, ClimateDevice):
+class MySensorsHVAC(mysensors.MySensorsEntity, ClimateDevice):
     """Representation of a MySensors HVAC."""
 
     @property
@@ -84,26 +64,28 @@ class MySensorsHVAC(mysensors.MySensorsDeviceEntity, ClimateDevice):
         temp = self._values.get(set_req.V_HVAC_SETPOINT_COOL)
         if temp is None:
             temp = self._values.get(set_req.V_HVAC_SETPOINT_HEAT)
-        return float(temp)
+        return float(temp) if temp is not None else None
 
     @property
     def target_temperature_high(self):
         """Return the highbound target temperature we try to reach."""
         set_req = self.gateway.const.SetReq
         if set_req.V_HVAC_SETPOINT_HEAT in self._values:
-            return float(self._values.get(set_req.V_HVAC_SETPOINT_COOL))
+            temp = self._values.get(set_req.V_HVAC_SETPOINT_COOL)
+            return float(temp) if temp is not None else None
 
     @property
     def target_temperature_low(self):
         """Return the lowbound target temperature we try to reach."""
         set_req = self.gateway.const.SetReq
         if set_req.V_HVAC_SETPOINT_COOL in self._values:
-            return float(self._values.get(set_req.V_HVAC_SETPOINT_HEAT))
+            temp = self._values.get(set_req.V_HVAC_SETPOINT_HEAT)
+            return float(temp) if temp is not None else None
 
     @property
     def current_operation(self):
         """Return current operation ie. heat, cool, idle."""
-        return self._values.get(self.gateway.const.SetReq.V_HVAC_FLOW_STATE)
+        return self._values.get(self.value_type)
 
     @property
     def operation_list(self):
@@ -128,7 +110,7 @@ class MySensorsHVAC(mysensors.MySensorsDeviceEntity, ClimateDevice):
         high = kwargs.get(ATTR_TARGET_TEMP_HIGH)
         heat = self._values.get(set_req.V_HVAC_SETPOINT_HEAT)
         cool = self._values.get(set_req.V_HVAC_SETPOINT_COOL)
-        updates = ()
+        updates = []
         if temp is not None:
             if heat is not None:
                 # Set HEAT Target temperature
@@ -146,7 +128,7 @@ class MySensorsHVAC(mysensors.MySensorsDeviceEntity, ClimateDevice):
             self.gateway.set_child_value(
                 self.node_id, self.child_id, value_type, value)
             if self.gateway.optimistic:
-                # optimistically assume that switch has changed state
+                # optimistically assume that device has changed state
                 self._values[value_type] = value
                 self.schedule_update_ha_state()
 
@@ -156,54 +138,22 @@ class MySensorsHVAC(mysensors.MySensorsDeviceEntity, ClimateDevice):
         self.gateway.set_child_value(
             self.node_id, self.child_id, set_req.V_HVAC_SPEED, fan)
         if self.gateway.optimistic:
-            # optimistically assume that switch has changed state
+            # optimistically assume that device has changed state
             self._values[set_req.V_HVAC_SPEED] = fan
             self.schedule_update_ha_state()
 
     def set_operation_mode(self, operation_mode):
         """Set new target temperature."""
-        set_req = self.gateway.const.SetReq
         self.gateway.set_child_value(
-            self.node_id, self.child_id, set_req.V_HVAC_FLOW_STATE,
+            self.node_id, self.child_id, self.value_type,
             DICT_HA_TO_MYS[operation_mode])
         if self.gateway.optimistic:
-            # optimistically assume that switch has changed state
-            self._values[set_req.V_HVAC_FLOW_STATE] = operation_mode
+            # optimistically assume that device has changed state
+            self._values[self.value_type] = operation_mode
             self.schedule_update_ha_state()
 
     def update(self):
         """Update the controller with the latest value from a sensor."""
-        set_req = self.gateway.const.SetReq
-        node = self.gateway.sensors[self.node_id]
-        child = node.children[self.child_id]
-        for value_type, value in child.values.items():
-            _LOGGER.debug(
-                "%s: value_type %s, value = %s", self._name, value_type, value)
-            if value_type == set_req.V_HVAC_FLOW_STATE:
-                self._values[value_type] = DICT_MYS_TO_HA[value]
-            else:
-                self._values[value_type] = value
-
-    def set_humidity(self, humidity):
-        """Set new target humidity."""
-        _LOGGER.error("Service Not Implemented yet")
-
-    def set_swing_mode(self, swing_mode):
-        """Set new target swing operation."""
-        _LOGGER.error("Service Not Implemented yet")
-
-    def turn_away_mode_on(self):
-        """Turn away mode on."""
-        _LOGGER.error("Service Not Implemented yet")
-
-    def turn_away_mode_off(self):
-        """Turn away mode off."""
-        _LOGGER.error("Service Not Implemented yet")
-
-    def turn_aux_heat_on(self):
-        """Turn auxillary heater on."""
-        _LOGGER.error("Service Not Implemented yet")
-
-    def turn_aux_heat_off(self):
-        """Turn auxillary heater off."""
-        _LOGGER.error("Service Not Implemented yet")
+        super().update()
+        self._values[self.value_type] = DICT_MYS_TO_HA[
+            self._values[self.value_type]]
diff --git a/homeassistant/components/cover/mysensors.py b/homeassistant/components/cover/mysensors.py
index f48a2110eca..cd4ff62b3e9 100644
--- a/homeassistant/components/cover/mysensors.py
+++ b/homeassistant/components/cover/mysensors.py
@@ -4,42 +4,18 @@ Support for MySensors covers.
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/cover.mysensors/
 """
-import logging
-
 from homeassistant.components import mysensors
-from homeassistant.components.cover import CoverDevice, ATTR_POSITION
+from homeassistant.components.cover import CoverDevice, ATTR_POSITION, DOMAIN
 from homeassistant.const import STATE_ON, STATE_OFF
 
-_LOGGER = logging.getLogger(__name__)
-
-DEPENDENCIES = []
-
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """Set up the MySensors platform for covers."""
-    if discovery_info is None:
-        return
-
-    gateways = hass.data.get(mysensors.MYSENSORS_GATEWAYS)
-    if not gateways:
-        return
-
-    for gateway in gateways:
-        pres = gateway.const.Presentation
-        set_req = gateway.const.SetReq
-        map_sv_types = {
-            pres.S_COVER: [set_req.V_DIMMER, set_req.V_LIGHT],
-        }
-        if float(gateway.protocol_version) >= 1.5:
-            map_sv_types.update({
-                pres.S_COVER: [set_req.V_PERCENTAGE, set_req.V_STATUS],
-            })
-        devices = {}
-        gateway.platform_callbacks.append(mysensors.pf_callback_factory(
-            map_sv_types, devices, MySensorsCover, add_devices))
+    """Setup the mysensors platform for covers."""
+    mysensors.setup_mysensors_platform(
+        hass, DOMAIN, discovery_info, MySensorsCover, add_devices=add_devices)
 
 
-class MySensorsCover(mysensors.MySensorsDeviceEntity, CoverDevice):
+class MySensorsCover(mysensors.MySensorsEntity, CoverDevice):
     """Representation of the value of a MySensors Cover child node."""
 
     @property
diff --git a/homeassistant/components/device_tracker/mysensors.py b/homeassistant/components/device_tracker/mysensors.py
index 4503c4d1b26..f68eb361ca0 100644
--- a/homeassistant/components/device_tracker/mysensors.py
+++ b/homeassistant/components/device_tracker/mysensors.py
@@ -4,61 +4,51 @@ Support for tracking MySensors devices.
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/device_tracker.mysensors/
 """
-import logging
-
 from homeassistant.components import mysensors
+from homeassistant.components.device_tracker import DOMAIN
+from homeassistant.helpers.dispatcher import dispatcher_connect
 from homeassistant.util import slugify
 
-DEPENDENCIES = ['mysensors']
-
-_LOGGER = logging.getLogger(__name__)
-
 
 def setup_scanner(hass, config, see, discovery_info=None):
-    """Set up the MySensors tracker."""
-    def mysensors_callback(gateway, msg):
-        """Set up callback for mysensors platform."""
-        node = gateway.sensors[msg.node_id]
-        if node.sketch_name is None:
-            _LOGGER.debug("No sketch_name: node %s", msg.node_id)
-            return
+    """Set up the MySensors device scanner."""
+    new_devices = mysensors.setup_mysensors_platform(
+        hass, DOMAIN, discovery_info, MySensorsDeviceScanner,
+        device_args=(see, ))
+    if not new_devices:
+        return False
 
-        pres = gateway.const.Presentation
-        set_req = gateway.const.SetReq
-
-        child = node.children.get(msg.child_id)
-        if child is None:
-            return
-        position = child.values.get(set_req.V_POSITION)
-        if child.type != pres.S_GPS or position is None:
-            return
-        try:
-            latitude, longitude, _ = position.split(',')
-        except ValueError:
-            _LOGGER.error("Payload for V_POSITION %s is not of format "
-                          "latitude, longitude, altitude", position)
-            return
-        name = '{} {} {}'.format(
-            node.sketch_name, msg.node_id, child.id)
-        attr = {
-            mysensors.ATTR_CHILD_ID: child.id,
-            mysensors.ATTR_DESCRIPTION: child.description,
-            mysensors.ATTR_DEVICE: gateway.device,
-            mysensors.ATTR_NODE_ID: msg.node_id,
-        }
-        see(
-            dev_id=slugify(name),
-            host_name=name,
-            gps=(latitude, longitude),
-            battery=node.battery_level,
-            attributes=attr
-        )
-
-    gateways = hass.data.get(mysensors.MYSENSORS_GATEWAYS)
-
-    for gateway in gateways:
-        if float(gateway.protocol_version) < 2.0:
-            continue
-        gateway.platform_callbacks.append(mysensors_callback)
+    for device in new_devices:
+        dev_id = (
+            id(device.gateway), device.node_id, device.child_id,
+            device.value_type)
+        dispatcher_connect(
+            hass, mysensors.SIGNAL_CALLBACK.format(*dev_id),
+            device.update_callback)
 
     return True
+
+
+class MySensorsDeviceScanner(mysensors.MySensorsDevice):
+    """Represent a MySensors scanner."""
+
+    def __init__(self, see, *args):
+        """Set up instance."""
+        super().__init__(*args)
+        self.see = see
+
+    def update_callback(self):
+        """Update the device."""
+        self.update()
+        node = self.gateway.sensors[self.node_id]
+        child = node.children[self.child_id]
+        position = child.values[self.value_type]
+        latitude, longitude, _ = position.split(',')
+
+        self.see(
+            dev_id=slugify(self.name),
+            host_name=self.name,
+            gps=(latitude, longitude),
+            battery=node.battery_level,
+            attributes=self.device_state_attributes
+        )
diff --git a/homeassistant/components/light/mysensors.py b/homeassistant/components/light/mysensors.py
index 203119e5e51..c41f480c67e 100644
--- a/homeassistant/components/light/mysensors.py
+++ b/homeassistant/components/light/mysensors.py
@@ -4,64 +4,35 @@ Support for MySensors lights.
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/light.mysensors/
 """
-import logging
-
 from homeassistant.components import mysensors
 from homeassistant.components.light import (
-    ATTR_BRIGHTNESS, ATTR_RGB_COLOR, ATTR_WHITE_VALUE,
+    ATTR_BRIGHTNESS, ATTR_RGB_COLOR, ATTR_WHITE_VALUE, DOMAIN,
     SUPPORT_BRIGHTNESS, SUPPORT_RGB_COLOR, SUPPORT_WHITE_VALUE, Light)
 from homeassistant.const import STATE_OFF, STATE_ON
 from homeassistant.util.color import rgb_hex_to_rgb_list
 
-_LOGGER = logging.getLogger(__name__)
-ATTR_VALUE = 'value'
-ATTR_VALUE_TYPE = 'value_type'
-
 SUPPORT_MYSENSORS = (SUPPORT_BRIGHTNESS | SUPPORT_RGB_COLOR |
                      SUPPORT_WHITE_VALUE)
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """Set up the MySensors platform for lights."""
-    if discovery_info is None:
-        return
-
-    gateways = hass.data.get(mysensors.MYSENSORS_GATEWAYS)
-    if not gateways:
-        return
-
-    for gateway in gateways:
-        # Define the S_TYPES and V_TYPES that the platform should handle as
-        # states. Map them in a dict of lists.
-        pres = gateway.const.Presentation
-        set_req = gateway.const.SetReq
-        map_sv_types = {
-            pres.S_DIMMER: [set_req.V_DIMMER],
-        }
-        device_class_map = {
-            pres.S_DIMMER: MySensorsLightDimmer,
-        }
-        if float(gateway.protocol_version) >= 1.5:
-            map_sv_types.update({
-                pres.S_RGB_LIGHT: [set_req.V_RGB],
-                pres.S_RGBW_LIGHT: [set_req.V_RGBW],
-            })
-            map_sv_types[pres.S_DIMMER].append(set_req.V_PERCENTAGE)
-            device_class_map.update({
-                pres.S_RGB_LIGHT: MySensorsLightRGB,
-                pres.S_RGBW_LIGHT: MySensorsLightRGBW,
-            })
-        devices = {}
-        gateway.platform_callbacks.append(mysensors.pf_callback_factory(
-            map_sv_types, devices, device_class_map, add_devices))
+    """Setup the mysensors platform for lights."""
+    device_class_map = {
+        'S_DIMMER': MySensorsLightDimmer,
+        'S_RGB_LIGHT': MySensorsLightRGB,
+        'S_RGBW_LIGHT': MySensorsLightRGBW,
+    }
+    mysensors.setup_mysensors_platform(
+        hass, DOMAIN, discovery_info, device_class_map,
+        add_devices=add_devices)
 
 
-class MySensorsLight(mysensors.MySensorsDeviceEntity, Light):
+class MySensorsLight(mysensors.MySensorsEntity, Light):
     """Representation of a MySensors Light child node."""
 
     def __init__(self, *args):
         """Initialize a MySensors Light."""
-        mysensors.MySensorsDeviceEntity.__init__(self, *args)
+        super().__init__(*args)
         self._state = None
         self._brightness = None
         self._rgb = None
@@ -101,7 +72,7 @@ class MySensorsLight(mysensors.MySensorsDeviceEntity, Light):
         """Turn on light child device."""
         set_req = self.gateway.const.SetReq
 
-        if self._state or set_req.V_LIGHT not in self._values:
+        if self._state:
             return
         self.gateway.set_child_value(
             self.node_id, self.child_id, set_req.V_LIGHT, 1)
@@ -110,7 +81,6 @@ class MySensorsLight(mysensors.MySensorsDeviceEntity, Light):
             # optimistically assume that light has changed state
             self._state = True
             self._values[set_req.V_LIGHT] = STATE_ON
-            self.schedule_update_ha_state()
 
     def _turn_on_dimmer(self, **kwargs):
         """Turn on dimmer child device."""
@@ -130,7 +100,6 @@ class MySensorsLight(mysensors.MySensorsDeviceEntity, Light):
             # optimistically assume that light has changed state
             self._brightness = brightness
             self._values[set_req.V_DIMMER] = percent
-            self.schedule_update_ha_state()
 
     def _turn_on_rgb_and_w(self, hex_template, **kwargs):
         """Turn on RGB or RGBW child device."""
@@ -144,16 +113,11 @@ class MySensorsLight(mysensors.MySensorsDeviceEntity, Light):
             return
         if new_rgb is not None:
             rgb = list(new_rgb)
-        if rgb is None:
-            return
         if hex_template == '%02x%02x%02x%02x':
             if new_white is not None:
                 rgb.append(new_white)
-            elif white is not None:
-                rgb.append(white)
             else:
-                _LOGGER.error("White value is not updated for RGBW light")
-                return
+                rgb.append(white)
         hex_color = hex_template % tuple(rgb)
         if len(rgb) > 3:
             white = rgb.pop()
@@ -164,104 +128,40 @@ class MySensorsLight(mysensors.MySensorsDeviceEntity, Light):
             # optimistically assume that light has changed state
             self._rgb = rgb
             self._white = white
-            if hex_color:
-                self._values[self.value_type] = hex_color
-            self.schedule_update_ha_state()
+            self._values[self.value_type] = hex_color
 
-    def _turn_off_light(self, value_type=None, value=None):
-        """Turn off light child device."""
-        set_req = self.gateway.const.SetReq
-        value_type = (
-            set_req.V_LIGHT
-            if set_req.V_LIGHT in self._values else value_type)
-        value = 0 if set_req.V_LIGHT in self._values else value
-        return {ATTR_VALUE_TYPE: value_type, ATTR_VALUE: value}
-
-    def _turn_off_dimmer(self, value_type=None, value=None):
-        """Turn off dimmer child device."""
-        set_req = self.gateway.const.SetReq
-        value_type = (
-            set_req.V_DIMMER
-            if set_req.V_DIMMER in self._values else value_type)
-        value = 0 if set_req.V_DIMMER in self._values else value
-        return {ATTR_VALUE_TYPE: value_type, ATTR_VALUE: value}
-
-    def _turn_off_rgb_or_w(self, value_type=None, value=None):
-        """Turn off RGB or RGBW child device."""
-        if float(self.gateway.protocol_version) >= 1.5:
-            set_req = self.gateway.const.SetReq
-            if self.value_type == set_req.V_RGB:
-                value = '000000'
-            elif self.value_type == set_req.V_RGBW:
-                value = '00000000'
-        return {ATTR_VALUE_TYPE: self.value_type, ATTR_VALUE: value}
-
-    def _turn_off_main(self, value_type=None, value=None):
+    def turn_off(self):
         """Turn the device off."""
-        set_req = self.gateway.const.SetReq
-        if value_type is None or value is None:
-            _LOGGER.warning(
-                "%s: value_type %s, value = %s, None is not valid argument "
-                "when setting child value", self._name, value_type, value)
-            return
+        value_type = self.gateway.const.SetReq.V_LIGHT
         self.gateway.set_child_value(
-            self.node_id, self.child_id, value_type, value)
+            self.node_id, self.child_id, value_type, 0)
         if self.gateway.optimistic:
             # optimistically assume that light has changed state
             self._state = False
-            self._values[value_type] = (
-                STATE_OFF if set_req.V_LIGHT in self._values else value)
+            self._values[value_type] = STATE_OFF
             self.schedule_update_ha_state()
 
     def _update_light(self):
         """Update the controller with values from light child."""
         value_type = self.gateway.const.SetReq.V_LIGHT
-        if value_type in self._values:
-            self._values[value_type] = (
-                STATE_ON if int(self._values[value_type]) == 1 else STATE_OFF)
-            self._state = self._values[value_type] == STATE_ON
+        self._state = self._values[value_type] == STATE_ON
 
     def _update_dimmer(self):
         """Update the controller with values from dimmer child."""
-        set_req = self.gateway.const.SetReq
-        value_type = set_req.V_DIMMER
+        value_type = self.gateway.const.SetReq.V_DIMMER
         if value_type in self._values:
             self._brightness = round(255 * int(self._values[value_type]) / 100)
             if self._brightness == 0:
                 self._state = False
-            if set_req.V_LIGHT not in self._values:
-                self._state = self._brightness > 0
 
     def _update_rgb_or_w(self):
         """Update the controller with values from RGB or RGBW child."""
-        set_req = self.gateway.const.SetReq
         value = self._values[self.value_type]
-        if len(value) != 6 and len(value) != 8:
-            _LOGGER.error(
-                "Wrong value %s for %s", value, set_req(self.value_type).name)
-            return
         color_list = rgb_hex_to_rgb_list(value)
-        if set_req.V_LIGHT not in self._values and \
-                set_req.V_DIMMER not in self._values:
-            self._state = max(color_list) > 0
         if len(color_list) > 3:
-            if set_req.V_RGBW != self.value_type:
-                _LOGGER.error(
-                    "Wrong value %s for %s",
-                    value, set_req(self.value_type).name)
-                return
             self._white = color_list.pop()
         self._rgb = color_list
 
-    def _update_main(self):
-        """Update the controller with the latest value from a sensor."""
-        node = self.gateway.sensors[self.node_id]
-        child = node.children[self.child_id]
-        for value_type, value in child.values.items():
-            _LOGGER.debug(
-                "%s: value_type %s, value = %s", self._name, value_type, value)
-            self._values[value_type] = value
-
 
 class MySensorsLightDimmer(MySensorsLight):
     """Dimmer child class to MySensorsLight."""
@@ -270,18 +170,12 @@ class MySensorsLightDimmer(MySensorsLight):
         """Turn the device on."""
         self._turn_on_light()
         self._turn_on_dimmer(**kwargs)
-
-    def turn_off(self, **kwargs):
-        """Turn the device off."""
-        ret = self._turn_off_dimmer()
-        ret = self._turn_off_light(
-            value_type=ret[ATTR_VALUE_TYPE], value=ret[ATTR_VALUE])
-        self._turn_off_main(
-            value_type=ret[ATTR_VALUE_TYPE], value=ret[ATTR_VALUE])
+        if self.gateway.optimistic:
+            self.schedule_update_ha_state()
 
     def update(self):
         """Update the controller with the latest value from a sensor."""
-        self._update_main()
+        super().update()
         self._update_light()
         self._update_dimmer()
 
@@ -294,20 +188,12 @@ class MySensorsLightRGB(MySensorsLight):
         self._turn_on_light()
         self._turn_on_dimmer(**kwargs)
         self._turn_on_rgb_and_w('%02x%02x%02x', **kwargs)
-
-    def turn_off(self, **kwargs):
-        """Turn the device off."""
-        ret = self._turn_off_rgb_or_w()
-        ret = self._turn_off_dimmer(
-            value_type=ret[ATTR_VALUE_TYPE], value=ret[ATTR_VALUE])
-        ret = self._turn_off_light(
-            value_type=ret[ATTR_VALUE_TYPE], value=ret[ATTR_VALUE])
-        self._turn_off_main(
-            value_type=ret[ATTR_VALUE_TYPE], value=ret[ATTR_VALUE])
+        if self.gateway.optimistic:
+            self.schedule_update_ha_state()
 
     def update(self):
         """Update the controller with the latest value from a sensor."""
-        self._update_main()
+        super().update()
         self._update_light()
         self._update_dimmer()
         self._update_rgb_or_w()
@@ -316,8 +202,12 @@ class MySensorsLightRGB(MySensorsLight):
 class MySensorsLightRGBW(MySensorsLightRGB):
     """RGBW child class to MySensorsLightRGB."""
 
+    # pylint: disable=too-many-ancestors
+
     def turn_on(self, **kwargs):
         """Turn the device on."""
         self._turn_on_light()
         self._turn_on_dimmer(**kwargs)
         self._turn_on_rgb_and_w('%02x%02x%02x%02x', **kwargs)
+        if self.gateway.optimistic:
+            self.schedule_update_ha_state()
diff --git a/homeassistant/components/mysensors.py b/homeassistant/components/mysensors.py
index ef863bfb34f..63bd1f6faac 100644
--- a/homeassistant/components/mysensors.py
+++ b/homeassistant/components/mysensors.py
@@ -4,30 +4,37 @@ Connect to a MySensors gateway via pymysensors API.
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/sensor.mysensors/
 """
+import asyncio
+from collections import defaultdict
 import logging
 import os
 import socket
 import sys
+from timeit import default_timer as timer
 
 import voluptuous as vol
 
-import homeassistant.helpers.config_validation as cv
-from homeassistant.setup import setup_component
 from homeassistant.components.mqtt import (
     valid_publish_topic, valid_subscribe_topic)
 from homeassistant.const import (
     ATTR_BATTERY_LEVEL, CONF_NAME, CONF_OPTIMISTIC, EVENT_HOMEASSISTANT_START,
     EVENT_HOMEASSISTANT_STOP, STATE_OFF, STATE_ON)
 from homeassistant.helpers import discovery
+import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.dispatcher import (
+    async_dispatcher_connect, dispatcher_send)
+from homeassistant.helpers.entity import Entity
 from homeassistant.loader import get_component
+from homeassistant.setup import setup_component
 
-REQUIREMENTS = ['pymysensors==0.10.0']
+REQUIREMENTS = ['pymysensors==0.11.0']
 
 _LOGGER = logging.getLogger(__name__)
 
 ATTR_CHILD_ID = 'child_id'
 ATTR_DESCRIPTION = 'description'
 ATTR_DEVICE = 'device'
+ATTR_DEVICES = 'devices'
 ATTR_NODE_ID = 'node_id'
 
 CONF_BAUD_RATE = 'baud_rate'
@@ -44,11 +51,16 @@ CONF_VERSION = 'version'
 
 DEFAULT_BAUD_RATE = 115200
 DEFAULT_TCP_PORT = 5003
-DEFAULT_VERSION = 1.4
+DEFAULT_VERSION = '1.4'
 DOMAIN = 'mysensors'
 
 MQTT_COMPONENT = 'mqtt'
 MYSENSORS_GATEWAYS = 'mysensors_gateways'
+MYSENSORS_PLATFORM_DEVICES = 'mysensors_devices_{}'
+PLATFORM = 'platform'
+SCHEMA = 'schema'
+SIGNAL_CALLBACK = 'mysensors_callback_{}_{}_{}_{}'
+TYPE = 'type'
 
 
 def is_socket_address(value):
@@ -144,11 +156,127 @@ CONFIG_SCHEMA = vol.Schema({
         vol.Optional(CONF_OPTIMISTIC, default=False): cv.boolean,
         vol.Optional(CONF_PERSISTENCE, default=True): cv.boolean,
         vol.Optional(CONF_RETAIN, default=True): cv.boolean,
-        vol.Optional(CONF_VERSION, default=DEFAULT_VERSION): vol.Coerce(float),
+        vol.Optional(CONF_VERSION, default=DEFAULT_VERSION): cv.string,
     }))
 }, extra=vol.ALLOW_EXTRA)
 
 
+# mysensors const schemas
+BINARY_SENSOR_SCHEMA = {PLATFORM: 'binary_sensor', TYPE: 'V_TRIPPED'}
+CLIMATE_SCHEMA = {PLATFORM: 'climate', TYPE: 'V_HVAC_FLOW_STATE'}
+LIGHT_DIMMER_SCHEMA = {
+    PLATFORM: 'light', TYPE: 'V_DIMMER',
+    SCHEMA: {'V_DIMMER': cv.string, 'V_LIGHT': cv.string}}
+LIGHT_PERCENTAGE_SCHEMA = {
+    PLATFORM: 'light', TYPE: 'V_PERCENTAGE',
+    SCHEMA: {'V_PERCENTAGE': cv.string, 'V_STATUS': cv.string}}
+LIGHT_RGB_SCHEMA = {
+    PLATFORM: 'light', TYPE: 'V_RGB', SCHEMA: {
+        'V_RGB': cv.string, 'V_STATUS': cv.string}}
+LIGHT_RGBW_SCHEMA = {
+    PLATFORM: 'light', TYPE: 'V_RGBW', SCHEMA: {
+        'V_RGBW': cv.string, 'V_STATUS': cv.string}}
+NOTIFY_SCHEMA = {PLATFORM: 'notify', TYPE: 'V_TEXT'}
+DEVICE_TRACKER_SCHEMA = {PLATFORM: 'device_tracker', TYPE: 'V_POSITION'}
+DUST_SCHEMA = [
+    {PLATFORM: 'sensor', TYPE: 'V_DUST_LEVEL'},
+    {PLATFORM: 'sensor', TYPE: 'V_LEVEL'}]
+SWITCH_LIGHT_SCHEMA = {PLATFORM: 'switch', TYPE: 'V_LIGHT'}
+SWITCH_STATUS_SCHEMA = {PLATFORM: 'switch', TYPE: 'V_STATUS'}
+MYSENSORS_CONST_SCHEMA = {
+    'S_DOOR': [BINARY_SENSOR_SCHEMA, {PLATFORM: 'switch', TYPE: 'V_ARMED'}],
+    'S_MOTION': [BINARY_SENSOR_SCHEMA, {PLATFORM: 'switch', TYPE: 'V_ARMED'}],
+    'S_SMOKE': [BINARY_SENSOR_SCHEMA, {PLATFORM: 'switch', TYPE: 'V_ARMED'}],
+    'S_SPRINKLER': [
+        BINARY_SENSOR_SCHEMA, {PLATFORM: 'switch', TYPE: 'V_STATUS'}],
+    'S_WATER_LEAK': [
+        BINARY_SENSOR_SCHEMA, {PLATFORM: 'switch', TYPE: 'V_ARMED'}],
+    'S_SOUND': [
+        BINARY_SENSOR_SCHEMA, {PLATFORM: 'sensor', TYPE: 'V_LEVEL'},
+        {PLATFORM: 'switch', TYPE: 'V_ARMED'}],
+    'S_VIBRATION': [
+        BINARY_SENSOR_SCHEMA, {PLATFORM: 'sensor', TYPE: 'V_LEVEL'},
+        {PLATFORM: 'switch', TYPE: 'V_ARMED'}],
+    'S_MOISTURE': [
+        BINARY_SENSOR_SCHEMA, {PLATFORM: 'sensor', TYPE: 'V_LEVEL'},
+        {PLATFORM: 'switch', TYPE: 'V_ARMED'}],
+    'S_HVAC': [CLIMATE_SCHEMA],
+    'S_COVER': [
+        {PLATFORM: 'cover', TYPE: 'V_DIMMER'},
+        {PLATFORM: 'cover', TYPE: 'V_PERCENTAGE'},
+        {PLATFORM: 'cover', TYPE: 'V_LIGHT'},
+        {PLATFORM: 'cover', TYPE: 'V_STATUS'}],
+    'S_DIMMER': [LIGHT_DIMMER_SCHEMA, LIGHT_PERCENTAGE_SCHEMA],
+    'S_RGB_LIGHT': [LIGHT_RGB_SCHEMA],
+    'S_RGBW_LIGHT': [LIGHT_RGBW_SCHEMA],
+    'S_INFO': [NOTIFY_SCHEMA, {PLATFORM: 'sensor', TYPE: 'V_TEXT'}],
+    'S_GPS': [
+        DEVICE_TRACKER_SCHEMA, {PLATFORM: 'sensor', TYPE: 'V_POSITION'}],
+    'S_TEMP': [{PLATFORM: 'sensor', TYPE: 'V_TEMP'}],
+    'S_HUM': [{PLATFORM: 'sensor', TYPE: 'V_HUM'}],
+    'S_BARO': [
+        {PLATFORM: 'sensor', TYPE: 'V_PRESSURE'},
+        {PLATFORM: 'sensor', TYPE: 'V_FORECAST'}],
+    'S_WIND': [
+        {PLATFORM: 'sensor', TYPE: 'V_WIND'},
+        {PLATFORM: 'sensor', TYPE: 'V_GUST'},
+        {PLATFORM: 'sensor', TYPE: 'V_DIRECTION'}],
+    'S_RAIN': [
+        {PLATFORM: 'sensor', TYPE: 'V_RAIN'},
+        {PLATFORM: 'sensor', TYPE: 'V_RAINRATE'}],
+    'S_UV': [{PLATFORM: 'sensor', TYPE: 'V_UV'}],
+    'S_WEIGHT': [
+        {PLATFORM: 'sensor', TYPE: 'V_WEIGHT'},
+        {PLATFORM: 'sensor', TYPE: 'V_IMPEDANCE'}],
+    'S_POWER': [
+        {PLATFORM: 'sensor', TYPE: 'V_WATT'},
+        {PLATFORM: 'sensor', TYPE: 'V_KWH'},
+        {PLATFORM: 'sensor', TYPE: 'V_VAR'},
+        {PLATFORM: 'sensor', TYPE: 'V_VA'},
+        {PLATFORM: 'sensor', TYPE: 'V_POWER_FACTOR'}],
+    'S_DISTANCE': [{PLATFORM: 'sensor', TYPE: 'V_DISTANCE'}],
+    'S_LIGHT_LEVEL': [
+        {PLATFORM: 'sensor', TYPE: 'V_LIGHT_LEVEL'},
+        {PLATFORM: 'sensor', TYPE: 'V_LEVEL'}],
+    'S_IR': [
+        {PLATFORM: 'sensor', TYPE: 'V_IR_RECEIVE'},
+        {PLATFORM: 'switch', TYPE: 'V_IR_SEND',
+         SCHEMA: {'V_IR_SEND': cv.string, 'V_LIGHT': cv.string}}],
+    'S_WATER': [
+        {PLATFORM: 'sensor', TYPE: 'V_FLOW'},
+        {PLATFORM: 'sensor', TYPE: 'V_VOLUME'}],
+    'S_CUSTOM': [
+        {PLATFORM: 'sensor', TYPE: 'V_VAR1'},
+        {PLATFORM: 'sensor', TYPE: 'V_VAR2'},
+        {PLATFORM: 'sensor', TYPE: 'V_VAR3'},
+        {PLATFORM: 'sensor', TYPE: 'V_VAR4'},
+        {PLATFORM: 'sensor', TYPE: 'V_VAR5'},
+        {PLATFORM: 'sensor', TYPE: 'V_CUSTOM'}],
+    'S_SCENE_CONTROLLER': [
+        {PLATFORM: 'sensor', TYPE: 'V_SCENE_ON'},
+        {PLATFORM: 'sensor', TYPE: 'V_SCENE_OFF'}],
+    'S_COLOR_SENSOR': [{PLATFORM: 'sensor', TYPE: 'V_RGB'}],
+    'S_MULTIMETER': [
+        {PLATFORM: 'sensor', TYPE: 'V_VOLTAGE'},
+        {PLATFORM: 'sensor', TYPE: 'V_CURRENT'},
+        {PLATFORM: 'sensor', TYPE: 'V_IMPEDANCE'}],
+    'S_GAS': [
+        {PLATFORM: 'sensor', TYPE: 'V_FLOW'},
+        {PLATFORM: 'sensor', TYPE: 'V_VOLUME'}],
+    'S_WATER_QUALITY': [
+        {PLATFORM: 'sensor', TYPE: 'V_TEMP'},
+        {PLATFORM: 'sensor', TYPE: 'V_PH'},
+        {PLATFORM: 'sensor', TYPE: 'V_ORP'},
+        {PLATFORM: 'sensor', TYPE: 'V_EC'},
+        {PLATFORM: 'switch', TYPE: 'V_STATUS'}],
+    'S_AIR_QUALITY': DUST_SCHEMA,
+    'S_DUST': DUST_SCHEMA,
+    'S_LIGHT': [SWITCH_LIGHT_SCHEMA],
+    'S_BINARY': [SWITCH_STATUS_SCHEMA],
+    'S_LOCK': [{PLATFORM: 'switch', TYPE: 'V_LOCK_STATUS'}],
+}
+
+
 def setup(hass, config):
     """Set up the MySensors component."""
     import mysensors.mysensors as mysensors
@@ -197,20 +325,14 @@ def setup(hass, config):
                     # invalid ip address
                     return
         gateway.metric = hass.config.units.is_metric
-        optimistic = config[DOMAIN].get(CONF_OPTIMISTIC)
-        gateway = GatewayWrapper(gateway, optimistic, device)
-        # pylint: disable=attribute-defined-outside-init
-        gateway.event_callback = gateway.callback_factory()
+        gateway.optimistic = config[DOMAIN].get(CONF_OPTIMISTIC)
+        gateway.device = device
+        gateway.event_callback = gw_callback_factory(hass)
 
         def gw_start(event):
             """Trigger to start of the gateway and any persistence."""
             if persistence:
-                for node_id in gateway.sensors:
-                    node = gateway.sensors[node_id]
-                    for child_id in node.children:
-                        msg = mysensors.Message().modify(
-                            node_id=node_id, child_id=child_id)
-                        gateway.event_callback(msg)
+                discover_persistent_devices(hass, gateway)
             gateway.start()
             hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP,
                                  lambda event: gateway.stop())
@@ -219,15 +341,8 @@ def setup(hass, config):
 
         return gateway
 
-    gateways = hass.data.get(MYSENSORS_GATEWAYS)
-    if gateways is not None:
-        _LOGGER.error(
-            "%s already exists in %s, will not setup %s component",
-            MYSENSORS_GATEWAYS, hass.data, DOMAIN)
-        return False
-
     # Setup all devices from config
-    gateways = []
+    gateways = {}
     conf_gateways = config[DOMAIN][CONF_GATEWAYS]
 
     for index, gway in enumerate(conf_gateways):
@@ -243,7 +358,7 @@ def setup(hass, config):
             device, persistence_file, baud_rate, tcp_port, in_prefix,
             out_prefix)
         if ready_gateway is not None:
-            gateways.append(ready_gateway)
+            gateways[id(ready_gateway)] = ready_gateway
 
     if not gateways:
         _LOGGER.error(
@@ -252,115 +367,187 @@ def setup(hass, config):
 
     hass.data[MYSENSORS_GATEWAYS] = gateways
 
-    for component in ['sensor', 'switch', 'light', 'binary_sensor', 'climate',
-                      'cover']:
-        discovery.load_platform(hass, component, DOMAIN, {}, config)
-
-    discovery.load_platform(
-        hass, 'device_tracker', DOMAIN, {}, config)
-
-    discovery.load_platform(
-        hass, 'notify', DOMAIN, {CONF_NAME: DOMAIN}, config)
-
     return True
 
 
-def pf_callback_factory(map_sv_types, devices, entity_class, add_devices=None):
-    """Return a new callback for the platform."""
-    def mysensors_callback(gateway, msg):
-        """Run when a message from the gateway arrives."""
-        if gateway.sensors[msg.node_id].sketch_name is None:
-            _LOGGER.debug("No sketch_name: node %s", msg.node_id)
-            return
-        child = gateway.sensors[msg.node_id].children.get(msg.child_id)
+def validate_child(gateway, node_id, child):
+    """Validate that a child has the correct values according to schema.
+
+    Return a dict of platform with a list of device ids for validated devices.
+    """
+    validated = defaultdict(list)
+
+    if not child.values:
+        _LOGGER.debug(
+            "No child values for node %s child %s", node_id, child.id)
+        return validated
+    if gateway.sensors[node_id].sketch_name is None:
+        _LOGGER.debug("Node %s is missing sketch name", node_id)
+        return validated
+    pres = gateway.const.Presentation
+    set_req = gateway.const.SetReq
+    s_name = next(
+        (member.name for member in pres if member.value == child.type), None)
+    if s_name not in MYSENSORS_CONST_SCHEMA:
+        _LOGGER.warning("Child type %s is not supported", s_name)
+        return validated
+    child_schemas = MYSENSORS_CONST_SCHEMA[s_name]
+
+    def msg(name):
+        """Return a message for an invalid schema."""
+        return "{} requires value_type {}".format(
+            pres(child.type).name, set_req[name].name)
+
+    for schema in child_schemas:
+        platform = schema[PLATFORM]
+        v_name = schema[TYPE]
+        value_type = next(
+            (member.value for member in set_req if member.name == v_name),
+            None)
+        if value_type is None:
+            continue
+        _child_schema = child.get_schema(gateway.protocol_version)
+        vol_schema = _child_schema.extend(
+            {vol.Required(set_req[key].value, msg=msg(key)):
+             _child_schema.schema.get(set_req[key].value, val)
+             for key, val in schema.get(SCHEMA, {v_name: cv.string}).items()},
+            extra=vol.ALLOW_EXTRA)
+        try:
+            vol_schema(child.values)
+        except vol.Invalid as exc:
+            level = (logging.WARNING if value_type in child.values
+                     else logging.DEBUG)
+            _LOGGER.log(
+                level,
+                "Invalid values: %s: %s platform: node %s child %s: %s",
+                child.values, platform, node_id, child.id, exc)
+            continue
+        dev_id = id(gateway), node_id, child.id, value_type
+        validated[platform].append(dev_id)
+    return validated
+
+
+def discover_mysensors_platform(hass, platform, new_devices):
+    """Discover a mysensors platform."""
+    discovery.load_platform(
+        hass, platform, DOMAIN, {ATTR_DEVICES: new_devices, CONF_NAME: DOMAIN})
+
+
+def discover_persistent_devices(hass, gateway):
+    """Discover platforms for devices loaded via persistence file."""
+    new_devices = defaultdict(list)
+    for node_id in gateway.sensors:
+        node = gateway.sensors[node_id]
+        for child in node.children.values():
+            validated = validate_child(gateway, node_id, child)
+            for platform, dev_ids in validated.items():
+                new_devices[platform].extend(dev_ids)
+    for platform, dev_ids in new_devices.items():
+        discover_mysensors_platform(hass, platform, dev_ids)
+
+
+def get_mysensors_devices(hass, domain):
+    """Return mysensors devices for a platform."""
+    if MYSENSORS_PLATFORM_DEVICES.format(domain) not in hass.data:
+        hass.data[MYSENSORS_PLATFORM_DEVICES.format(domain)] = {}
+    return hass.data[MYSENSORS_PLATFORM_DEVICES.format(domain)]
+
+
+def gw_callback_factory(hass):
+    """Return a new callback for the gateway."""
+    def mysensors_callback(msg):
+        """Default callback for a mysensors gateway."""
+        start = timer()
+        _LOGGER.debug(
+            "Node update: node %s child %s", msg.node_id, msg.child_id)
+
+        child = msg.gateway.sensors[msg.node_id].children.get(msg.child_id)
         if child is None:
+            _LOGGER.debug(
+                "Not a child update for node %s", msg.node_id)
             return
-        for value_type in child.values:
-            key = msg.node_id, child.id, value_type
-            if child.type not in map_sv_types or \
-                    value_type not in map_sv_types[child.type]:
-                continue
-            if key in devices:
-                if add_devices:
-                    devices[key].schedule_update_ha_state(True)
-                else:
-                    devices[key].update()
-                continue
-            name = '{} {} {}'.format(
-                gateway.sensors[msg.node_id].sketch_name, msg.node_id,
-                child.id)
-            if isinstance(entity_class, dict):
-                device_class = entity_class[child.type]
-            else:
-                device_class = entity_class
-            devices[key] = device_class(
-                gateway, msg.node_id, child.id, name, value_type)
-            if add_devices:
-                _LOGGER.info("Adding new devices: %s", [devices[key]])
-                add_devices([devices[key]], True)
-            else:
-                devices[key].update()
+
+        signals = []
+
+        # Update all platforms for the device via dispatcher.
+        # Add/update entity if schema validates to true.
+        validated = validate_child(msg.gateway, msg.node_id, child)
+        for platform, dev_ids in validated.items():
+            devices = get_mysensors_devices(hass, platform)
+            for idx, dev_id in enumerate(list(dev_ids)):
+                if dev_id in devices:
+                    dev_ids.pop(idx)
+                    signals.append(SIGNAL_CALLBACK.format(*dev_id))
+            if dev_ids:
+                discover_mysensors_platform(hass, platform, dev_ids)
+        for signal in set(signals):
+            # Only one signal per device is needed.
+            # A device can have multiple platforms, ie multiple schemas.
+            # FOR LATER: Add timer to not signal if another update comes in.
+            dispatcher_send(hass, signal)
+        end = timer()
+        if end - start > 0.1:
+            _LOGGER.debug(
+                "Callback for node %s child %s took %.3f seconds",
+                msg.node_id, msg.child_id, end - start)
     return mysensors_callback
 
 
-class GatewayWrapper(object):
-    """Gateway wrapper class."""
-
-    def __init__(self, gateway, optimistic, device):
-        """Set up the class attributes on instantiation.
-
-        Args:
-        gateway (mysensors.SerialGateway): Gateway to wrap.
-        optimistic (bool): Send values to actuators without feedback state.
-        device (str): Path to serial port, ip adress or mqtt.
-
-        Attributes:
-        _wrapped_gateway (mysensors.SerialGateway): Wrapped gateway.
-        platform_callbacks (list): Callback functions, one per platform.
-        optimistic (bool): Send values to actuators without feedback state.
-        device (str): Device configured as gateway.
-        __initialised (bool): True if GatewayWrapper is initialised.
-
-        """
-        self._wrapped_gateway = gateway
-        self.platform_callbacks = []
-        self.optimistic = optimistic
-        self.device = device
-        self.__initialised = True
-
-    def __getattr__(self, name):
-        """See if this object has attribute name."""
-        # Do not use hasattr, it goes into infinite recurrsion
-        if name in self.__dict__:
-            # This object has the attribute.
-            return getattr(self, name)
-        # The wrapped object has the attribute.
-        return getattr(self._wrapped_gateway, name)
-
-    def __setattr__(self, name, value):
-        """See if this object has attribute name then set to value."""
-        if '_GatewayWrapper__initialised' not in self.__dict__:
-            return object.__setattr__(self, name, value)
-        elif name in self.__dict__:
-            object.__setattr__(self, name, value)
-        else:
-            object.__setattr__(self._wrapped_gateway, name, value)
-
-    def callback_factory(self):
-        """Return a new callback function."""
-        def node_update(msg):
-            """Handle node updates from the MySensors gateway."""
-            _LOGGER.debug(
-                "Update: node %s, child %s sub_type %s",
-                msg.node_id, msg.child_id, msg.sub_type)
-            for callback in self.platform_callbacks:
-                callback(self, msg)
-
-        return node_update
+def get_mysensors_name(gateway, node_id, child_id):
+    """Return a name for a node child."""
+    return '{} {} {}'.format(
+        gateway.sensors[node_id].sketch_name, node_id, child_id)
 
 
-class MySensorsDeviceEntity(object):
-    """Representation of a MySensors entity."""
+def get_mysensors_gateway(hass, gateway_id):
+    """Return gateway."""
+    if MYSENSORS_GATEWAYS not in hass.data:
+        hass.data[MYSENSORS_GATEWAYS] = {}
+    gateways = hass.data.get(MYSENSORS_GATEWAYS)
+    return gateways.get(gateway_id)
+
+
+def setup_mysensors_platform(
+        hass, domain, discovery_info, device_class, device_args=None,
+        add_devices=None):
+    """Set up a mysensors platform."""
+    # Only act if called via mysensors by discovery event.
+    # Otherwise gateway is not setup.
+    if not discovery_info:
+        return
+    if device_args is None:
+        device_args = ()
+    new_devices = []
+    new_dev_ids = discovery_info[ATTR_DEVICES]
+    for dev_id in new_dev_ids:
+        devices = get_mysensors_devices(hass, domain)
+        if dev_id in devices:
+            continue
+        gateway_id, node_id, child_id, value_type = dev_id
+        gateway = get_mysensors_gateway(hass, gateway_id)
+        if not gateway:
+            continue
+        device_class_copy = device_class
+        if isinstance(device_class, dict):
+            child = gateway.sensors[node_id].children[child_id]
+            s_type = gateway.const.Presentation(child.type).name
+            device_class_copy = device_class[s_type]
+        name = get_mysensors_name(gateway, node_id, child_id)
+
+        # python 3.4 cannot unpack inside tuple, but combining tuples works
+        args_copy = device_args + (
+            gateway, node_id, child_id, name, value_type)
+        devices[dev_id] = device_class_copy(*args_copy)
+        new_devices.append(devices[dev_id])
+    if new_devices:
+        _LOGGER.info("Adding new devices: %s", new_devices)
+        if add_devices is not None:
+            add_devices(new_devices, True)
+    return new_devices
+
+
+class MySensorsDevice(object):
+    """Representation of a MySensors device."""
 
     def __init__(self, gateway, node_id, child_id, name, value_type):
         """Set up the MySensors device."""
@@ -373,11 +560,6 @@ class MySensorsDeviceEntity(object):
         self.child_type = child.type
         self._values = {}
 
-    @property
-    def should_poll(self):
-        """Mysensor gateway pushes its state to HA."""
-        return False
-
     @property
     def name(self):
         """Return the name of this entity."""
@@ -399,18 +581,9 @@ class MySensorsDeviceEntity(object):
         set_req = self.gateway.const.SetReq
 
         for value_type, value in self._values.items():
-            try:
-                attr[set_req(value_type).name] = value
-            except ValueError:
-                _LOGGER.error("Value_type %s is not valid for mysensors "
-                              "version %s", value_type,
-                              self.gateway.protocol_version)
-        return attr
+            attr[set_req(value_type).name] = value
 
-    @property
-    def available(self):
-        """Return true if entity is available."""
-        return self.value_type in self._values
+        return attr
 
     def update(self):
         """Update the controller with the latest value from a sensor."""
@@ -419,7 +592,8 @@ class MySensorsDeviceEntity(object):
         set_req = self.gateway.const.SetReq
         for value_type, value in child.values.items():
             _LOGGER.debug(
-                "%s: value_type %s, value = %s", self._name, value_type, value)
+                "Entity update: %s: value_type %s, value = %s",
+                self._name, value_type, value)
             if value_type in (set_req.V_ARMED, set_req.V_LIGHT,
                               set_req.V_LOCK_STATUS, set_req.V_TRIPPED):
                 self._values[value_type] = (
@@ -428,3 +602,29 @@ class MySensorsDeviceEntity(object):
                 self._values[value_type] = int(value)
             else:
                 self._values[value_type] = value
+
+
+class MySensorsEntity(MySensorsDevice, Entity):
+    """Representation of a MySensors entity."""
+
+    @property
+    def should_poll(self):
+        """Mysensor gateway pushes its state to HA."""
+        return False
+
+    @property
+    def available(self):
+        """Return true if entity is available."""
+        return self.value_type in self._values
+
+    def _async_update_callback(self):
+        """Update the entity."""
+        self.hass.async_add_job(self.async_update_ha_state(True))
+
+    @asyncio.coroutine
+    def async_added_to_hass(self):
+        """Register update callback."""
+        dev_id = id(self.gateway), self.node_id, self.child_id, self.value_type
+        async_dispatcher_connect(
+            self.hass, SIGNAL_CALLBACK.format(*dev_id),
+            self._async_update_callback)
diff --git a/homeassistant/components/notify/mysensors.py b/homeassistant/components/notify/mysensors.py
index d9576767f25..8ae697048f5 100644
--- a/homeassistant/components/notify/mysensors.py
+++ b/homeassistant/components/notify/mysensors.py
@@ -6,35 +6,19 @@ https://home-assistant.io/components/notify.mysensors/
 """
 from homeassistant.components import mysensors
 from homeassistant.components.notify import (
-    ATTR_TARGET, BaseNotificationService)
+    ATTR_TARGET, DOMAIN, BaseNotificationService)
 
 
 def get_service(hass, config, discovery_info=None):
     """Get the MySensors notification service."""
-    if discovery_info is None:
+    new_devices = mysensors.setup_mysensors_platform(
+        hass, DOMAIN, discovery_info, MySensorsNotificationDevice)
+    if not new_devices:
         return
-    platform_devices = []
-    gateways = hass.data.get(mysensors.MYSENSORS_GATEWAYS)
-    if not gateways:
-        return
-
-    for gateway in gateways:
-        if float(gateway.protocol_version) < 2.0:
-            continue
-        pres = gateway.const.Presentation
-        set_req = gateway.const.SetReq
-        map_sv_types = {
-            pres.S_INFO: [set_req.V_TEXT],
-        }
-        devices = {}
-        gateway.platform_callbacks.append(mysensors.pf_callback_factory(
-            map_sv_types, devices, MySensorsNotificationDevice))
-        platform_devices.append(devices)
-
-    return MySensorsNotificationService(platform_devices)
+    return MySensorsNotificationService(hass)
 
 
-class MySensorsNotificationDevice(mysensors.MySensorsDeviceEntity):
+class MySensorsNotificationDevice(mysensors.MySensorsDevice):
     """Represent a MySensors Notification device."""
 
     def send_msg(self, msg):
@@ -44,24 +28,25 @@ class MySensorsNotificationDevice(mysensors.MySensorsDeviceEntity):
             self.gateway.set_child_value(
                 self.node_id, self.child_id, self.value_type, sub_msg)
 
+    def __repr__(self):
+        """Return the representation."""
+        return "<MySensorsNotificationDevice {}>".format(self.name)
+
 
 class MySensorsNotificationService(BaseNotificationService):
-    """Implement MySensors notification service."""
+    """Implement a MySensors notification service."""
 
     # pylint: disable=too-few-public-methods
 
-    def __init__(self, platform_devices):
+    def __init__(self, hass):
         """Initialize the service."""
-        self.platform_devices = platform_devices
+        self.devices = mysensors.get_mysensors_devices(hass, DOMAIN)
 
     def send_message(self, message="", **kwargs):
         """Send a message to a user."""
         target_devices = kwargs.get(ATTR_TARGET)
-        devices = []
-        for gw_devs in self.platform_devices:
-            for device in gw_devs.values():
-                if target_devices is None or device.name in target_devices:
-                    devices.append(device)
+        devices = [device for device in self.devices.values()
+                   if target_devices is None or device.name in target_devices]
 
         for device in devices:
             device.send_msg(message)
diff --git a/homeassistant/components/sensor/mysensors.py b/homeassistant/components/sensor/mysensors.py
index d46680c7b66..a8daf212e57 100644
--- a/homeassistant/components/sensor/mysensors.py
+++ b/homeassistant/components/sensor/mysensors.py
@@ -4,89 +4,18 @@ Support for MySensors sensors.
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/sensor.mysensors/
 """
-import logging
-
 from homeassistant.components import mysensors
+from homeassistant.components.sensor import DOMAIN
 from homeassistant.const import TEMP_CELSIUS, TEMP_FAHRENHEIT
-from homeassistant.helpers.entity import Entity
-
-_LOGGER = logging.getLogger(__name__)
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
     """Set up the MySensors platform for sensors."""
-    # Only act if loaded via mysensors by discovery event.
-    # Otherwise gateway is not setup.
-    if discovery_info is None:
-        return
-
-    gateways = hass.data.get(mysensors.MYSENSORS_GATEWAYS)
-    if not gateways:
-        return
-
-    for gateway in gateways:
-        # Define the S_TYPES and V_TYPES that the platform should handle as
-        # states. Map them in a dict of lists.
-        pres = gateway.const.Presentation
-        set_req = gateway.const.SetReq
-        map_sv_types = {
-            pres.S_TEMP: [set_req.V_TEMP],
-            pres.S_HUM: [set_req.V_HUM],
-            pres.S_BARO: [set_req.V_PRESSURE, set_req.V_FORECAST],
-            pres.S_WIND: [set_req.V_WIND, set_req.V_GUST, set_req.V_DIRECTION],
-            pres.S_RAIN: [set_req.V_RAIN, set_req.V_RAINRATE],
-            pres.S_UV: [set_req.V_UV],
-            pres.S_WEIGHT: [set_req.V_WEIGHT, set_req.V_IMPEDANCE],
-            pres.S_POWER: [set_req.V_WATT, set_req.V_KWH],
-            pres.S_DISTANCE: [set_req.V_DISTANCE],
-            pres.S_LIGHT_LEVEL: [set_req.V_LIGHT_LEVEL],
-            pres.S_IR: [set_req.V_IR_RECEIVE],
-            pres.S_WATER: [set_req.V_FLOW, set_req.V_VOLUME],
-            pres.S_CUSTOM: [set_req.V_VAR1,
-                            set_req.V_VAR2,
-                            set_req.V_VAR3,
-                            set_req.V_VAR4,
-                            set_req.V_VAR5],
-            pres.S_SCENE_CONTROLLER: [set_req.V_SCENE_ON,
-                                      set_req.V_SCENE_OFF],
-        }
-        if float(gateway.protocol_version) < 1.5:
-            map_sv_types.update({
-                pres.S_AIR_QUALITY: [set_req.V_DUST_LEVEL],
-                pres.S_DUST: [set_req.V_DUST_LEVEL],
-            })
-        if float(gateway.protocol_version) >= 1.5:
-            map_sv_types.update({
-                pres.S_COLOR_SENSOR: [set_req.V_RGB],
-                pres.S_MULTIMETER: [set_req.V_VOLTAGE,
-                                    set_req.V_CURRENT,
-                                    set_req.V_IMPEDANCE],
-                pres.S_SOUND: [set_req.V_LEVEL],
-                pres.S_VIBRATION: [set_req.V_LEVEL],
-                pres.S_MOISTURE: [set_req.V_LEVEL],
-                pres.S_AIR_QUALITY: [set_req.V_LEVEL],
-                pres.S_DUST: [set_req.V_LEVEL],
-            })
-            map_sv_types[pres.S_LIGHT_LEVEL].append(set_req.V_LEVEL)
-
-        if float(gateway.protocol_version) >= 2.0:
-            map_sv_types.update({
-                pres.S_INFO: [set_req.V_TEXT],
-                pres.S_GAS: [set_req.V_FLOW, set_req.V_VOLUME],
-                pres.S_GPS: [set_req.V_POSITION],
-                pres.S_WATER_QUALITY: [set_req.V_TEMP, set_req.V_PH,
-                                       set_req.V_ORP, set_req.V_EC]
-            })
-            map_sv_types[pres.S_CUSTOM].append(set_req.V_CUSTOM)
-            map_sv_types[pres.S_POWER].extend(
-                [set_req.V_VAR, set_req.V_VA, set_req.V_POWER_FACTOR])
-
-        devices = {}
-        gateway.platform_callbacks.append(mysensors.pf_callback_factory(
-            map_sv_types, devices, MySensorsSensor, add_devices))
+    mysensors.setup_mysensors_platform(
+        hass, DOMAIN, discovery_info, MySensorsSensor, add_devices=add_devices)
 
 
-class MySensorsSensor(mysensors.MySensorsDeviceEntity, Entity):
+class MySensorsSensor(mysensors.MySensorsEntity):
     """Representation of a MySensors Sensor child node."""
 
     @property
diff --git a/homeassistant/components/switch/mysensors.py b/homeassistant/components/switch/mysensors.py
index 38f67ee3ee9..131ec58ae67 100644
--- a/homeassistant/components/switch/mysensors.py
+++ b/homeassistant/components/switch/mysensors.py
@@ -4,7 +4,6 @@ Support for MySensors switches.
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/switch.mysensors/
 """
-import logging
 import os
 
 import voluptuous as vol
@@ -15,9 +14,6 @@ from homeassistant.components.switch import DOMAIN, SwitchDevice
 from homeassistant.config import load_yaml_config_file
 from homeassistant.const import ATTR_ENTITY_ID, STATE_OFF, STATE_ON
 
-_LOGGER = logging.getLogger(__name__)
-DEPENDENCIES = []
-
 ATTR_IR_CODE = 'V_IR_SEND'
 SERVICE_SEND_IR_CODE = 'mysensors_send_ir_code'
 
@@ -29,82 +25,37 @@ SEND_IR_CODE_SERVICE_SCHEMA = vol.Schema({
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
     """Set up the mysensors platform for switches."""
-    # Only act if loaded via mysensors by discovery event.
-    # Otherwise gateway is not setup.
-    if discovery_info is None:
-        return
-
-    gateways = hass.data.get(mysensors.MYSENSORS_GATEWAYS)
-    if not gateways:
-        return
-
-    platform_devices = []
-
-    for gateway in gateways:
-        # Define the S_TYPES and V_TYPES that the platform should handle as
-        # states. Map them in a dict of lists.
-        pres = gateway.const.Presentation
-        set_req = gateway.const.SetReq
-        map_sv_types = {
-            pres.S_DOOR: [set_req.V_ARMED],
-            pres.S_MOTION: [set_req.V_ARMED],
-            pres.S_SMOKE: [set_req.V_ARMED],
-            pres.S_LIGHT: [set_req.V_LIGHT],
-            pres.S_LOCK: [set_req.V_LOCK_STATUS],
-            pres.S_IR: [set_req.V_IR_SEND],
-        }
-        device_class_map = {
-            pres.S_DOOR: MySensorsSwitch,
-            pres.S_MOTION: MySensorsSwitch,
-            pres.S_SMOKE: MySensorsSwitch,
-            pres.S_LIGHT: MySensorsSwitch,
-            pres.S_LOCK: MySensorsSwitch,
-            pres.S_IR: MySensorsIRSwitch,
-        }
-        if float(gateway.protocol_version) >= 1.5:
-            map_sv_types.update({
-                pres.S_BINARY: [set_req.V_STATUS, set_req.V_LIGHT],
-                pres.S_SPRINKLER: [set_req.V_STATUS],
-                pres.S_WATER_LEAK: [set_req.V_ARMED],
-                pres.S_SOUND: [set_req.V_ARMED],
-                pres.S_VIBRATION: [set_req.V_ARMED],
-                pres.S_MOISTURE: [set_req.V_ARMED],
-            })
-            map_sv_types[pres.S_LIGHT].append(set_req.V_STATUS)
-            device_class_map.update({
-                pres.S_BINARY: MySensorsSwitch,
-                pres.S_SPRINKLER: MySensorsSwitch,
-                pres.S_WATER_LEAK: MySensorsSwitch,
-                pres.S_SOUND: MySensorsSwitch,
-                pres.S_VIBRATION: MySensorsSwitch,
-                pres.S_MOISTURE: MySensorsSwitch,
-            })
-        if float(gateway.protocol_version) >= 2.0:
-            map_sv_types.update({
-                pres.S_WATER_QUALITY: [set_req.V_STATUS],
-            })
-            device_class_map.update({
-                pres.S_WATER_QUALITY: MySensorsSwitch,
-            })
-
-        devices = {}
-        gateway.platform_callbacks.append(mysensors.pf_callback_factory(
-            map_sv_types, devices, device_class_map, add_devices))
-        platform_devices.append(devices)
+    device_class_map = {
+        'S_DOOR': MySensorsSwitch,
+        'S_MOTION': MySensorsSwitch,
+        'S_SMOKE': MySensorsSwitch,
+        'S_LIGHT': MySensorsSwitch,
+        'S_LOCK': MySensorsSwitch,
+        'S_IR': MySensorsIRSwitch,
+        'S_BINARY': MySensorsSwitch,
+        'S_SPRINKLER': MySensorsSwitch,
+        'S_WATER_LEAK': MySensorsSwitch,
+        'S_SOUND': MySensorsSwitch,
+        'S_VIBRATION': MySensorsSwitch,
+        'S_MOISTURE': MySensorsSwitch,
+        'S_WATER_QUALITY': MySensorsSwitch,
+    }
+    mysensors.setup_mysensors_platform(
+        hass, DOMAIN, discovery_info, device_class_map,
+        add_devices=add_devices)
 
     def send_ir_code_service(service):
         """Set IR code as device state attribute."""
         entity_ids = service.data.get(ATTR_ENTITY_ID)
         ir_code = service.data.get(ATTR_IR_CODE)
+        devices = mysensors.get_mysensors_devices(hass, DOMAIN)
 
         if entity_ids:
-            _devices = [device for gw_devs in platform_devices
-                        for device in gw_devs.values()
+            _devices = [device for device in devices.values()
                         if isinstance(device, MySensorsIRSwitch) and
                         device.entity_id in entity_ids]
         else:
-            _devices = [device for gw_devs in platform_devices
-                        for device in gw_devs.values()
+            _devices = [device for device in devices.values()
                         if isinstance(device, MySensorsIRSwitch)]
 
         kwargs = {ATTR_IR_CODE: ir_code}
@@ -120,7 +71,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
                            schema=SEND_IR_CODE_SERVICE_SCHEMA)
 
 
-class MySensorsSwitch(mysensors.MySensorsDeviceEntity, SwitchDevice):
+class MySensorsSwitch(mysensors.MySensorsEntity, SwitchDevice):
     """Representation of the value of a MySensors Switch child node."""
 
     @property
@@ -131,9 +82,7 @@ class MySensorsSwitch(mysensors.MySensorsDeviceEntity, SwitchDevice):
     @property
     def is_on(self):
         """Return True if switch is on."""
-        if self.value_type in self._values:
-            return self._values[self.value_type] == STATE_ON
-        return False
+        return self._values.get(self.value_type) == STATE_ON
 
     def turn_on(self, **kwargs):
         """Turn the switch on."""
@@ -159,24 +108,18 @@ class MySensorsIRSwitch(MySensorsSwitch):
 
     def __init__(self, *args):
         """Set up instance attributes."""
-        MySensorsSwitch.__init__(self, *args)
+        super().__init__(*args)
         self._ir_code = None
 
     @property
     def is_on(self):
         """Return True if switch is on."""
         set_req = self.gateway.const.SetReq
-        if set_req.V_LIGHT in self._values:
-            return self._values[set_req.V_LIGHT] == STATE_ON
-        return False
+        return self._values.get(set_req.V_LIGHT) == STATE_ON
 
     def turn_on(self, **kwargs):
         """Turn the IR switch on."""
         set_req = self.gateway.const.SetReq
-        if set_req.V_LIGHT not in self._values:
-            _LOGGER.error('missing value_type: %s at node: %s, child: %s',
-                          set_req.V_LIGHT.name, self.node_id, self.child_id)
-            return
         if ATTR_IR_CODE in kwargs:
             self._ir_code = kwargs[ATTR_IR_CODE]
         self.gateway.set_child_value(
@@ -194,10 +137,6 @@ class MySensorsIRSwitch(MySensorsSwitch):
     def turn_off(self, **kwargs):
         """Turn the IR switch off."""
         set_req = self.gateway.const.SetReq
-        if set_req.V_LIGHT not in self._values:
-            _LOGGER.error('missing value_type: %s at node: %s, child: %s',
-                          set_req.V_LIGHT.name, self.node_id, self.child_id)
-            return
         self.gateway.set_child_value(
             self.node_id, self.child_id, set_req.V_LIGHT, 0)
         if self.gateway.optimistic:
@@ -207,6 +146,5 @@ class MySensorsIRSwitch(MySensorsSwitch):
 
     def update(self):
         """Update the controller with the latest value from a sensor."""
-        MySensorsSwitch.update(self)
-        if self.value_type in self._values:
-            self._ir_code = self._values[self.value_type]
+        super().update()
+        self._ir_code = self._values.get(self.value_type)
diff --git a/requirements_all.txt b/requirements_all.txt
index cf6325e6572..f1fc40a2187 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -655,7 +655,7 @@ pymodbus==1.3.1
 pymyq==0.0.8
 
 # homeassistant.components.mysensors
-pymysensors==0.10.0
+pymysensors==0.11.0
 
 # homeassistant.components.lock.nello
 pynello==1.5