diff --git a/homeassistant/components/isy994.py b/homeassistant/components/isy994.py
new file mode 100644
index 00000000000..7a556d565e3
--- /dev/null
+++ b/homeassistant/components/isy994.py
@@ -0,0 +1,73 @@
+"""
+Connects to an ISY-994 controller and loads relevant components to control its devices.
+"""
+# system imports
+import logging
+from urllib.parse import urlparse
+
+# addon library imports
+import PyISY
+
+# homeassistant imports
+from homeassistant import bootstrap
+from homeassistant.loader import get_component
+from homeassistant.helpers import validate_config
+from homeassistant.helpers.entity import ToggleEntity
+from homeassistant.const import (
+        CONF_HOST, CONF_USERNAME, CONF_PASSWORD,
+    EVENT_PLATFORM_DISCOVERED,
+    ATTR_SERVICE, ATTR_DISCOVERED, ATTR_FRIENDLY_NAME)
+
+# homeassistant constants
+DOMAIN = "isy994"
+DEPENDENCIES = []
+#DISCOVER_LIGHTS = "isy994.lights"
+#DISCOVER_SWITCHES = "isy994.switches"
+DISCOVER_SENSORS = "isy994.sensors"
+ISY = None
+
+def setup(hass, config):
+    """ Sets up the ISY994 component. """
+    logger = logging.getLogger(__name__)
+    logger.setLevel(logging.DEBUG)
+
+    # pull values from configuration file
+    if not validate_config(config, 
+            {DOMAIN: [CONF_HOST, CONF_USERNAME, CONF_PASSWORD]}, logger):
+        return False
+    else:
+        user = config[DOMAIN][CONF_USERNAME]
+        password = config[DOMAIN][CONF_PASSWORD]
+        host = urlparse(config[DOMAIN][CONF_HOST])
+        addr = host.geturl()
+        if host.scheme == 'http':
+            addr = addr.replace('http://', '')
+            https = False
+        elif host.scheme == 'https':
+            addr = addr.replace('https://', '')
+            https = True
+        else:
+            logger.error('isy994 host value in configuration ' + 
+                    'file is invalid.')
+            return False
+        port = host.port
+        addr = addr.replace(':{}'.format(port), '')
+
+    # connect to ISY controller
+    global ISY
+    ISY = PyISY.ISY(addr, port, user, password, use_https=https, log=logger)
+    if not ISY.connected:
+        return False
+
+    # Load components for the devices in the ISY controller that we support
+    for comp_name, discovery in ((('sensor', DISCOVER_SENSORS),)):
+        component = get_component(comp_name)
+        bootstrap.setup_component(hass, component.DOMAIN, config)
+        hass.bus.fire(EVENT_PLATFORM_DISCOVERED, 
+                {
+                    ATTR_SERVICE: discovery,
+                    ATTR_DISCOVERED: {}
+                })
+
+    ISY.auto_update = True
+    return True
diff --git a/homeassistant/components/sensor/__init__.py b/homeassistant/components/sensor/__init__.py
index 8248651710a..5cbd07d0e59 100644
--- a/homeassistant/components/sensor/__init__.py
+++ b/homeassistant/components/sensor/__init__.py
@@ -6,7 +6,7 @@ Component to interface with various sensors that can be monitored.
 import logging
 
 from homeassistant.helpers.entity_component import EntityComponent
-from homeassistant.components import wink, zwave
+from homeassistant.components import wink, zwave, isy994
 
 DOMAIN = 'sensor'
 DEPENDENCIES = []
@@ -18,6 +18,7 @@ ENTITY_ID_FORMAT = DOMAIN + '.{}'
 DISCOVERY_PLATFORMS = {
     wink.DISCOVER_SENSORS: 'wink',
     zwave.DISCOVER_SENSORS: 'zwave',
+    isy994.DISCOVER_SENSORS: 'isy994'
 }
 
 
diff --git a/homeassistant/components/sensor/isy994.py b/homeassistant/components/sensor/isy994.py
new file mode 100644
index 00000000000..66f5eb84fab
--- /dev/null
+++ b/homeassistant/components/sensor/isy994.py
@@ -0,0 +1,100 @@
+""" Support for ISY994 sensors. """
+# system imports
+import logging
+
+# homeassistant imports
+from ..isy994 import ISY
+from homeassistant.helpers.entity import Entity
+from homeassistant.const import STATE_OPEN, STATE_CLOSED
+
+
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """ Sets up the isy994 platform. """
+    logger = logging.getLogger(__name__)
+    devs = []
+    # verify connection
+    if ISY is None or not ISY.connected:
+        logger.error('A connection has not been made to the ISY controller.')
+        return False
+
+    # import weather
+    if ISY.climate is not None:
+        for prop in ISY.climate._id2name:
+            if prop is not None:
+                devs.append(ISYSensorDevice('ISY.weather.' + prop, prop,
+                    getattr(ISY.climate, prop), 
+                    getattr(ISY.climate, prop + '_units')))
+
+
+    add_devices(devs)
+
+
+class ISYSensorDevice(Entity):
+    """ represents a isy sensor within home assistant. """
+
+    domain = 'sensor'
+
+    def __init__(self, device_id, name, source, units=None):
+        # setup properties
+        self._id = device_id
+        self._name = name
+        self.entity_id = self.domain + '.' + self.name.replace(' ', '_')
+        self._source = source
+        self._units = units
+
+        # track changes
+        self._changeHandler = self._source.subscribe('changed', self.onUpdate)
+
+    def __del__(self):
+        self._changeHandler.unsubscribe()
+
+    @property
+    def should_poll(self):
+        return False
+
+    @property
+    def dtype(self):
+        return 'binary' if self._units is None else 'analog'
+
+    @property
+    def state(self):
+        """ Returns the state. """
+        if self.dtype is 'binary':
+            return STATE_OPEN if self.is_open >= 255 else STATE_CLOSED
+        else:
+            return self.value
+
+    @property
+    def state_attributes(self):
+        return {}
+
+    @property
+    def unit_of_measurement(self):
+        return self._units
+
+    @property
+    def unique_id(self):
+        """ Returns the id of this isy sensor """
+        return self._id
+
+    @property
+    def name(self):
+        """ Returns the name of the sensor if any. """
+        return self._name
+
+    def update(self):
+        """ Update state of the sensor. """
+        # ISY objects are automatically updated by the ISY's event stream
+        pass
+
+    @property
+    def is_open(self):
+        """ True if door is open. """
+        return self.value >= 255
+
+    @property
+    def value(self):
+        return self._source._val
+
+    def onUpdate(self, e):
+        self.update_ha_state()