diff --git a/homeassistant/components/isy994/__init__.py b/homeassistant/components/isy994/__init__.py
index e0fcab2fe2051..05e44ea4fdd50 100644
--- a/homeassistant/components/isy994/__init__.py
+++ b/homeassistant/components/isy994/__init__.py
@@ -1,31 +1,34 @@
 """Support the ISY-994 controllers."""
+import asyncio
+from functools import partial
+from typing import Optional
 from urllib.parse import urlparse
 
 from pyisy import ISY
 import voluptuous as vol
 
-from homeassistant.const import (
-    CONF_HOST,
-    CONF_PASSWORD,
-    CONF_USERNAME,
-    EVENT_HOMEASSISTANT_STOP,
-)
-from homeassistant.core import HomeAssistant
-from homeassistant.helpers import config_validation as cv, discovery
+from homeassistant import config_entries
+from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.typing import ConfigType
 
 from .const import (
     _LOGGER,
     CONF_IGNORE_STRING,
+    CONF_RESTORE_LIGHT_STATE,
     CONF_SENSOR_STRING,
     CONF_TLS_VER,
     DEFAULT_IGNORE_STRING,
+    DEFAULT_RESTORE_LIGHT_STATE,
     DEFAULT_SENSOR_STRING,
     DOMAIN,
+    ISY994_ISY,
     ISY994_NODES,
     ISY994_PROGRAMS,
     SUPPORTED_PLATFORMS,
     SUPPORTED_PROGRAM_PLATFORMS,
+    UNDO_UPDATE_LISTENER,
 )
 from .helpers import _categorize_nodes, _categorize_programs
 
@@ -43,6 +46,9 @@
                 vol.Optional(
                     CONF_SENSOR_STRING, default=DEFAULT_SENSOR_STRING
                 ): cv.string,
+                vol.Required(
+                    CONF_RESTORE_LIGHT_STATE, default=DEFAULT_RESTORE_LIGHT_STATE
+                ): bool,
             }
         )
     },
@@ -50,24 +56,71 @@
 )
 
 
-def setup(hass: HomeAssistant, config: ConfigType) -> bool:
-    """Set up the ISY 994 platform."""
-    hass.data[ISY994_NODES] = {}
+async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
+    """Set up the isy994 integration from YAML."""
+    isy_config: Optional[ConfigType] = config.get(DOMAIN)
+    hass.data.setdefault(DOMAIN, {})
+
+    if not isy_config:
+        return True
+
+    # Only import if we haven't before.
+    config_entry = _async_find_matching_config_entry(hass)
+    if not config_entry:
+        hass.async_create_task(
+            hass.config_entries.flow.async_init(
+                DOMAIN,
+                context={"source": config_entries.SOURCE_IMPORT},
+                data=dict(isy_config),
+            )
+        )
+        return True
+
+    # Update the entry based on the YAML configuration, in case it changed.
+    hass.config_entries.async_update_entry(config_entry, data=dict(isy_config))
+    return True
+
+
+@callback
+def _async_find_matching_config_entry(hass):
+    for entry in hass.config_entries.async_entries(DOMAIN):
+        if entry.source == config_entries.SOURCE_IMPORT:
+            return entry
+
+
+async def async_setup_entry(
+    hass: HomeAssistant, entry: config_entries.ConfigEntry
+) -> bool:
+    """Set up the ISY 994 integration."""
+    # As there currently is no way to import options from yaml
+    # when setting up a config entry, we fallback to adding
+    # the options to the config entry and pull them out here if
+    # they are missing from the options
+    _async_import_options_from_data_if_missing(hass, entry)
+
+    hass.data[DOMAIN][entry.entry_id] = {}
+    hass_isy_data = hass.data[DOMAIN][entry.entry_id]
+
+    hass_isy_data[ISY994_NODES] = {}
     for platform in SUPPORTED_PLATFORMS:
-        hass.data[ISY994_NODES][platform] = []
+        hass_isy_data[ISY994_NODES][platform] = []
 
-    hass.data[ISY994_PROGRAMS] = {}
+    hass_isy_data[ISY994_PROGRAMS] = {}
     for platform in SUPPORTED_PROGRAM_PLATFORMS:
-        hass.data[ISY994_PROGRAMS][platform] = []
+        hass_isy_data[ISY994_PROGRAMS][platform] = []
 
-    isy_config = config.get(DOMAIN)
+    isy_config = entry.data
+    isy_options = entry.options
 
-    user = isy_config.get(CONF_USERNAME)
-    password = isy_config.get(CONF_PASSWORD)
+    # Required
+    user = isy_config[CONF_USERNAME]
+    password = isy_config[CONF_PASSWORD]
+    host = urlparse(isy_config[CONF_HOST])
+
+    # Optional
     tls_version = isy_config.get(CONF_TLS_VER)
-    host = urlparse(isy_config.get(CONF_HOST))
-    ignore_identifier = isy_config.get(CONF_IGNORE_STRING)
-    sensor_identifier = isy_config.get(CONF_SENSOR_STRING)
+    ignore_identifier = isy_options.get(CONF_IGNORE_STRING, DEFAULT_IGNORE_STRING)
+    sensor_identifier = isy_options.get(CONF_SENSOR_STRING, DEFAULT_SENSOR_STRING)
 
     if host.scheme == "http":
         https = False
@@ -80,31 +133,103 @@ def setup(hass: HomeAssistant, config: ConfigType) -> bool:
         return False
 
     # Connect to ISY controller.
-    isy = ISY(
-        host.hostname,
-        port,
-        username=user,
-        password=password,
-        use_https=https,
-        tls_ver=tls_version,
-        log=_LOGGER,
+    isy = await hass.async_add_executor_job(
+        partial(
+            ISY,
+            host.hostname,
+            port,
+            username=user,
+            password=password,
+            use_https=https,
+            tls_ver=tls_version,
+            log=_LOGGER,
+            webroot=host.path,
+        )
     )
     if not isy.connected:
         return False
 
-    _categorize_nodes(hass, isy.nodes, ignore_identifier, sensor_identifier)
-    _categorize_programs(hass, isy.programs)
+    _categorize_nodes(hass_isy_data, isy.nodes, ignore_identifier, sensor_identifier)
+    _categorize_programs(hass_isy_data, isy.programs)
 
-    def stop(event: object) -> None:
-        """Stop ISY auto updates."""
-        isy.auto_update = False
+    # Dump ISY Clock Information. Future: Add ISY as sensor to Hass with attrs
+    _LOGGER.info(repr(isy.clock))
 
-    # Listen for HA stop to disconnect.
-    hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, stop)
+    hass_isy_data[ISY994_ISY] = isy
 
     # Load platforms for the devices in the ISY controller that we support.
     for platform in SUPPORTED_PLATFORMS:
-        discovery.load_platform(hass, platform, DOMAIN, {}, config)
+        hass.async_create_task(
+            hass.config_entries.async_forward_entry_setup(entry, platform)
+        )
+
+    def _start_auto_update() -> None:
+        """Start isy auto update."""
+        _LOGGER.debug("ISY Starting Event Stream and automatic updates.")
+        isy.auto_update = True
+
+    await hass.async_add_executor_job(_start_auto_update)
+
+    undo_listener = entry.add_update_listener(_async_update_listener)
+
+    hass_isy_data[UNDO_UPDATE_LISTENER] = undo_listener
 
-    isy.auto_update = True
     return True
+
+
+async def _async_update_listener(
+    hass: HomeAssistant, entry: config_entries.ConfigEntry
+):
+    """Handle options update."""
+    await hass.config_entries.async_reload(entry.entry_id)
+
+
+@callback
+def _async_import_options_from_data_if_missing(
+    hass: HomeAssistant, entry: config_entries.ConfigEntry
+):
+    options = dict(entry.options)
+    modified = False
+    for importable_option in [
+        CONF_IGNORE_STRING,
+        CONF_SENSOR_STRING,
+        CONF_RESTORE_LIGHT_STATE,
+    ]:
+        if importable_option not in entry.options and importable_option in entry.data:
+            options[importable_option] = entry.data[importable_option]
+            modified = True
+
+    if modified:
+        hass.config_entries.async_update_entry(entry, options=options)
+
+
+async def async_unload_entry(
+    hass: HomeAssistant, entry: config_entries.ConfigEntry
+) -> bool:
+    """Unload a config entry."""
+    unload_ok = all(
+        await asyncio.gather(
+            *[
+                hass.config_entries.async_forward_entry_unload(entry, platform)
+                for platform in SUPPORTED_PLATFORMS
+            ]
+        )
+    )
+
+    hass_isy_data = hass.data[DOMAIN][entry.entry_id]
+
+    isy = hass_isy_data[ISY994_ISY]
+
+    def _stop_auto_update() -> None:
+        """Start isy auto update."""
+        _LOGGER.debug("ISY Stopping Event Stream and automatic updates.")
+        isy.auto_update = False
+
+    await hass.async_add_executor_job(_stop_auto_update)
+
+    hass_isy_data[UNDO_UPDATE_LISTENER]()
+
+    if unload_ok:
+        hass.data[DOMAIN].pop(entry.entry_id)
+
+    return unload_ok
diff --git a/homeassistant/components/isy994/binary_sensor.py b/homeassistant/components/isy994/binary_sensor.py
index 1ec54aa7b452c..62fae6cca3709 100644
--- a/homeassistant/components/isy994/binary_sensor.py
+++ b/homeassistant/components/isy994/binary_sensor.py
@@ -23,20 +23,24 @@
     DOMAIN as BINARY_SENSOR,
     BinarySensorEntity,
 )
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import STATE_OFF, STATE_ON, STATE_UNKNOWN
 from homeassistant.core import callback
 from homeassistant.helpers.event import async_track_point_in_utc_time
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import HomeAssistantType
 from homeassistant.util import dt as dt_util
 
-from . import ISY994_NODES, ISY994_PROGRAMS
 from .const import (
     _LOGGER,
     BINARY_SENSOR_DEVICE_TYPES_ISY,
     BINARY_SENSOR_DEVICE_TYPES_ZWAVE,
+    DOMAIN as ISY994_DOMAIN,
+    ISY994_NODES,
+    ISY994_PROGRAMS,
     TYPE_CATEGORY_CLIMATE,
 )
 from .entity import ISYNodeEntity, ISYProgramEntity
+from .helpers import migrate_old_unique_ids
 
 DEVICE_PARENT_REQUIRED = [
     DEVICE_CLASS_OPENING,
@@ -56,15 +60,18 @@
 TYPE_INSTEON_MOTION = ("16.1.", "16.22.")
 
 
-def setup_platform(
-    hass, config: ConfigType, add_entities: Callable[[list], None], discovery_info=None
-):
+async def async_setup_entry(
+    hass: HomeAssistantType,
+    entry: ConfigEntry,
+    async_add_entities: Callable[[list], None],
+) -> bool:
     """Set up the ISY994 binary sensor platform."""
     devices = []
     devices_by_address = {}
     child_nodes = []
 
-    for node in hass.data[ISY994_NODES][BINARY_SENSOR]:
+    hass_isy_data = hass.data[ISY994_DOMAIN][entry.entry_id]
+    for node in hass_isy_data[ISY994_NODES][BINARY_SENSOR]:
         device_class, device_type = _detect_device_type_and_class(node)
         if node.protocol == PROTO_INSTEON:
             if node.parent_node is not None:
@@ -162,10 +169,11 @@ def setup_platform(
         device = ISYBinarySensorEntity(node, device_class)
         devices.append(device)
 
-    for name, status, _ in hass.data[ISY994_PROGRAMS][BINARY_SENSOR]:
+    for name, status, _ in hass_isy_data[ISY994_PROGRAMS][BINARY_SENSOR]:
         devices.append(ISYBinarySensorProgramEntity(name, status))
 
-    add_entities(devices)
+    await migrate_old_unique_ids(hass, BINARY_SENSOR, devices)
+    async_add_entities(devices)
 
 
 def _detect_device_type_and_class(node: Union[Group, Node]) -> (str, str):
@@ -235,7 +243,7 @@ class ISYInsteonBinarySensorEntity(ISYBinarySensorEntity):
 
     Often times, a single device is represented by multiple nodes in the ISY,
     allowing for different nuances in how those devices report their on and
-    off events. This class turns those multiple nodes in to a single Home
+    off events. This class turns those multiple nodes into a single Home
     Assistant entity and handles both ways that ISY binary sensors can work.
     """
 
diff --git a/homeassistant/components/isy994/config_flow.py b/homeassistant/components/isy994/config_flow.py
new file mode 100644
index 0000000000000..cf78c6ddc4782
--- /dev/null
+++ b/homeassistant/components/isy994/config_flow.py
@@ -0,0 +1,180 @@
+"""Config flow for Universal Devices ISY994 integration."""
+import logging
+from urllib.parse import urlparse
+
+from pyisy.configuration import Configuration
+from pyisy.connection import Connection
+import voluptuous as vol
+
+from homeassistant import config_entries, core, exceptions
+from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME
+from homeassistant.core import callback
+
+from .const import (
+    CONF_IGNORE_STRING,
+    CONF_RESTORE_LIGHT_STATE,
+    CONF_SENSOR_STRING,
+    CONF_TLS_VER,
+    DEFAULT_IGNORE_STRING,
+    DEFAULT_RESTORE_LIGHT_STATE,
+    DEFAULT_SENSOR_STRING,
+    DEFAULT_TLS_VERSION,
+)
+from .const import DOMAIN  # pylint:disable=unused-import
+
+_LOGGER = logging.getLogger(__name__)
+
+
+DATA_SCHEMA = vol.Schema(
+    {
+        vol.Required(CONF_HOST): str,
+        vol.Required(CONF_USERNAME): str,
+        vol.Required(CONF_PASSWORD): str,
+        vol.Optional(CONF_TLS_VER, default=DEFAULT_TLS_VERSION): vol.In([1.1, 1.2]),
+    },
+    extra=vol.ALLOW_EXTRA,
+)
+
+
+async def validate_input(hass: core.HomeAssistant, data):
+    """Validate the user input allows us to connect.
+
+    Data has the keys from DATA_SCHEMA with values provided by the user.
+    """
+    user = data[CONF_USERNAME]
+    password = data[CONF_PASSWORD]
+    host = urlparse(data[CONF_HOST])
+    tls_version = data.get(CONF_TLS_VER)
+
+    if host.scheme == "http":
+        https = False
+        port = host.port or 80
+    elif host.scheme == "https":
+        https = True
+        port = host.port or 443
+    else:
+        _LOGGER.error("isy994 host value in configuration is invalid")
+        raise InvalidHost
+
+    # Connect to ISY controller.
+    isy_conf = await hass.async_add_executor_job(
+        _fetch_isy_configuration,
+        host.hostname,
+        port,
+        user,
+        password,
+        https,
+        tls_version,
+        host.path,
+    )
+
+    # Return info that you want to store in the config entry.
+    return {"title": f"{isy_conf['name']} ({host.hostname})", "uuid": isy_conf["uuid"]}
+
+
+def _fetch_isy_configuration(
+    address, port, username, password, use_https, tls_ver, webroot
+):
+    """Validate and fetch the configuration from the ISY."""
+    try:
+        isy_conn = Connection(
+            address,
+            port,
+            username,
+            password,
+            use_https,
+            tls_ver,
+            log=_LOGGER,
+            webroot=webroot,
+        )
+    except ValueError as err:
+        raise InvalidAuth(err.args[0])
+
+    return Configuration(log=_LOGGER, xml=isy_conn.get_config())
+
+
+class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
+    """Handle a config flow for Universal Devices ISY994."""
+
+    VERSION = 1
+    CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_PUSH
+
+    @staticmethod
+    @callback
+    def async_get_options_flow(config_entry):
+        """Get the options flow for this handler."""
+        return OptionsFlowHandler(config_entry)
+
+    async def async_step_user(self, user_input=None):
+        """Handle the initial step."""
+        errors = {}
+        info = None
+        if user_input is not None:
+            try:
+                info = await validate_input(self.hass, user_input)
+            except CannotConnect:
+                errors["base"] = "cannot_connect"
+            except InvalidHost:
+                errors["base"] = "invalid_host"
+            except InvalidAuth:
+                errors["base"] = "invalid_auth"
+            except Exception:  # pylint: disable=broad-except
+                _LOGGER.exception("Unexpected exception")
+                errors["base"] = "unknown"
+
+            if "base" not in errors:
+                await self.async_set_unique_id(info["uuid"])
+                self._abort_if_unique_id_configured()
+                return self.async_create_entry(title=info["title"], data=user_input)
+
+        return self.async_show_form(
+            step_id="user", data_schema=DATA_SCHEMA, errors=errors
+        )
+
+    async def async_step_import(self, user_input):
+        """Handle import."""
+        return await self.async_step_user(user_input)
+
+
+class OptionsFlowHandler(config_entries.OptionsFlow):
+    """Handle a option flow for isy994."""
+
+    def __init__(self, config_entry: config_entries.ConfigEntry):
+        """Initialize options flow."""
+        self.config_entry = config_entry
+
+    async def async_step_init(self, user_input=None):
+        """Handle options flow."""
+        if user_input is not None:
+            return self.async_create_entry(title="", data=user_input)
+
+        options = self.config_entry.options
+        restore_light_state = options.get(
+            CONF_RESTORE_LIGHT_STATE, DEFAULT_RESTORE_LIGHT_STATE
+        )
+        ignore_string = options.get(CONF_IGNORE_STRING, DEFAULT_IGNORE_STRING)
+        sensor_string = options.get(CONF_SENSOR_STRING, DEFAULT_SENSOR_STRING)
+
+        options_schema = vol.Schema(
+            {
+                vol.Optional(CONF_IGNORE_STRING, default=ignore_string): str,
+                vol.Optional(CONF_SENSOR_STRING, default=sensor_string): str,
+                vol.Required(
+                    CONF_RESTORE_LIGHT_STATE, default=restore_light_state
+                ): bool,
+            }
+        )
+
+        return self.async_show_form(step_id="init", data_schema=options_schema)
+
+
+class InvalidHost(exceptions.HomeAssistantError):
+    """Error to indicate the host value is invalid."""
+
+
+class CannotConnect(exceptions.HomeAssistantError):
+    """Error to indicate we cannot connect."""
+
+
+class InvalidAuth(exceptions.HomeAssistantError):
+    """Error to indicate there is invalid auth."""
diff --git a/homeassistant/components/isy994/const.py b/homeassistant/components/isy994/const.py
index 3cc01d55b46e9..5474f76d41366 100644
--- a/homeassistant/components/isy994/const.py
+++ b/homeassistant/components/isy994/const.py
@@ -98,9 +98,11 @@
 CONF_IGNORE_STRING = "ignore_string"
 CONF_SENSOR_STRING = "sensor_string"
 CONF_TLS_VER = "tls"
+CONF_RESTORE_LIGHT_STATE = "restore_light_state"
 
 DEFAULT_IGNORE_STRING = "{IGNORE ME}"
 DEFAULT_SENSOR_STRING = "sensor"
+DEFAULT_RESTORE_LIGHT_STATE = False
 DEFAULT_TLS_VERSION = 1.1
 DEFAULT_PROGRAM_STRING = "HA."
 
@@ -136,12 +138,16 @@
 TYPE_CATEGORY_SENSOR_ACTUATORS = "7."
 TYPE_CATEGORY_ENERGY_MGMT = "9."
 TYPE_CATEGORY_COVER = "14."
-TYPE_CATEOGRY_LOCK = "15."
+TYPE_CATEGORY_LOCK = "15."
 TYPE_CATEGORY_SAFETY = "16."
 TYPE_CATEGORY_X10 = "113."
 
+UNDO_UPDATE_LISTENER = "undo_update_listener"
+
 # Do not use the Home Assistant consts for the states here - we're matching exact API
 # responses, not using them for Home Assistant states
+# Insteon Types: https://www.universal-devices.com/developers/wsdk/5.0.4/1_fam.xml
+# Z-Wave Categories: https://www.universal-devices.com/developers/wsdk/5.0.4/4_fam.xml
 NODE_FILTERS = {
     BINARY_SENSOR: {
         FILTER_UOM: [],
@@ -191,7 +197,7 @@
         FILTER_UOM: ["11"],
         FILTER_STATES: ["locked", "unlocked"],
         FILTER_NODE_DEF_ID: ["DoorLock"],
-        FILTER_INSTEON_TYPE: [TYPE_CATEOGRY_LOCK, "4.64."],
+        FILTER_INSTEON_TYPE: [TYPE_CATEGORY_LOCK, "4.64."],
         FILTER_ZWAVE_CAT: ["111"],
     },
     FAN: {
diff --git a/homeassistant/components/isy994/cover.py b/homeassistant/components/isy994/cover.py
index 567838c570f62..1d99bb1171f75 100644
--- a/homeassistant/components/isy994/cover.py
+++ b/homeassistant/components/isy994/cover.py
@@ -4,26 +4,37 @@
 from pyisy.constants import ISY_VALUE_UNKNOWN
 
 from homeassistant.components.cover import DOMAIN as COVER, CoverEntity
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import STATE_CLOSED, STATE_OPEN, STATE_UNKNOWN
-from homeassistant.helpers.typing import ConfigType
-
-from . import ISY994_NODES, ISY994_PROGRAMS
-from .const import _LOGGER, UOM_TO_STATES
+from homeassistant.helpers.typing import HomeAssistantType
+
+from .const import (
+    _LOGGER,
+    DOMAIN as ISY994_DOMAIN,
+    ISY994_NODES,
+    ISY994_PROGRAMS,
+    UOM_TO_STATES,
+)
 from .entity import ISYNodeEntity, ISYProgramEntity
+from .helpers import migrate_old_unique_ids
 
 
-def setup_platform(
-    hass, config: ConfigType, add_entities: Callable[[list], None], discovery_info=None
-):
+async def async_setup_entry(
+    hass: HomeAssistantType,
+    entry: ConfigEntry,
+    async_add_entities: Callable[[list], None],
+) -> bool:
     """Set up the ISY994 cover platform."""
+    hass_isy_data = hass.data[ISY994_DOMAIN][entry.entry_id]
     devices = []
-    for node in hass.data[ISY994_NODES][COVER]:
+    for node in hass_isy_data[ISY994_NODES][COVER]:
         devices.append(ISYCoverEntity(node))
 
-    for name, status, actions in hass.data[ISY994_PROGRAMS][COVER]:
+    for name, status, actions in hass_isy_data[ISY994_PROGRAMS][COVER]:
         devices.append(ISYCoverProgramEntity(name, status, actions))
 
-    add_entities(devices)
+    await migrate_old_unique_ids(hass, COVER, devices)
+    async_add_entities(devices)
 
 
 class ISYCoverEntity(ISYNodeEntity, CoverEntity):
diff --git a/homeassistant/components/isy994/entity.py b/homeassistant/components/isy994/entity.py
index c9dc3bbb56df6..9a1444e61d31b 100644
--- a/homeassistant/components/isy994/entity.py
+++ b/homeassistant/components/isy994/entity.py
@@ -56,6 +56,13 @@ def on_control(self, event: NodeProperty) -> None:
     @property
     def unique_id(self) -> str:
         """Get the unique identifier of the device."""
+        if hasattr(self._node, "address"):
+            return f"{self._node.isy.configuration['uuid']}_{self._node.address}"
+        return None
+
+    @property
+    def old_unique_id(self) -> str:
+        """Get the old unique identifier of the device."""
         if hasattr(self._node, "address"):
             return self._node.address
         return None
diff --git a/homeassistant/components/isy994/fan.py b/homeassistant/components/isy994/fan.py
index 013191093e4f6..a472cba3f33d6 100644
--- a/homeassistant/components/isy994/fan.py
+++ b/homeassistant/components/isy994/fan.py
@@ -10,11 +10,12 @@
     SUPPORT_SET_SPEED,
     FanEntity,
 )
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.helpers.typing import HomeAssistantType
 
-from . import ISY994_NODES, ISY994_PROGRAMS
-from .const import _LOGGER
+from .const import _LOGGER, DOMAIN as ISY994_DOMAIN, ISY994_NODES, ISY994_PROGRAMS
 from .entity import ISYNodeEntity, ISYProgramEntity
+from .helpers import migrate_old_unique_ids
 
 VALUE_TO_STATE = {
     0: SPEED_OFF,
@@ -30,19 +31,23 @@
     STATE_TO_VALUE[VALUE_TO_STATE[key]] = key
 
 
-def setup_platform(
-    hass, config: ConfigType, add_entities: Callable[[list], None], discovery_info=None
-):
+async def async_setup_entry(
+    hass: HomeAssistantType,
+    entry: ConfigEntry,
+    async_add_entities: Callable[[list], None],
+) -> bool:
     """Set up the ISY994 fan platform."""
+    hass_isy_data = hass.data[ISY994_DOMAIN][entry.entry_id]
     devices = []
 
-    for node in hass.data[ISY994_NODES][FAN]:
+    for node in hass_isy_data[ISY994_NODES][FAN]:
         devices.append(ISYFanEntity(node))
 
-    for name, status, actions in hass.data[ISY994_PROGRAMS][FAN]:
+    for name, status, actions in hass_isy_data[ISY994_PROGRAMS][FAN]:
         devices.append(ISYFanProgramEntity(name, status, actions))
 
-    add_entities(devices)
+    await migrate_old_unique_ids(hass, FAN, devices)
+    async_add_entities(devices)
 
 
 class ISYFanEntity(ISYNodeEntity, FanEntity):
diff --git a/homeassistant/components/isy994/helpers.py b/homeassistant/components/isy994/helpers.py
index 4201a038fbccc..2fde917485f42 100644
--- a/homeassistant/components/isy994/helpers.py
+++ b/homeassistant/components/isy994/helpers.py
@@ -1,5 +1,5 @@
 """Sorting helpers for ISY994 device classifications."""
-from typing import Union
+from typing import Any, List, Optional, Union
 
 from pyisy.constants import (
     PROTO_GROUP,
@@ -16,11 +16,13 @@
 from homeassistant.components.light import DOMAIN as LIGHT
 from homeassistant.components.sensor import DOMAIN as SENSOR
 from homeassistant.components.switch import DOMAIN as SWITCH
+from homeassistant.helpers.entity_registry import async_get_registry
 from homeassistant.helpers.typing import HomeAssistantType
 
 from .const import (
     _LOGGER,
     DEFAULT_PROGRAM_STRING,
+    DOMAIN,
     FILTER_INSTEON_TYPE,
     FILTER_NODE_DEF_ID,
     FILTER_STATES,
@@ -48,7 +50,7 @@
 
 
 def _check_for_node_def(
-    hass: HomeAssistantType, node: Union[Group, Node], single_platform: str = None
+    hass_isy_data: dict, node: Union[Group, Node], single_platform: str = None
 ) -> bool:
     """Check if the node matches the node_def_id for any platforms.
 
@@ -64,14 +66,14 @@ def _check_for_node_def(
     platforms = SUPPORTED_PLATFORMS if not single_platform else [single_platform]
     for platform in platforms:
         if node_def_id in NODE_FILTERS[platform][FILTER_NODE_DEF_ID]:
-            hass.data[ISY994_NODES][platform].append(node)
+            hass_isy_data[ISY994_NODES][platform].append(node)
             return True
 
     return False
 
 
 def _check_for_insteon_type(
-    hass: HomeAssistantType, node: Union[Group, Node], single_platform: str = None
+    hass_isy_data: dict, node: Union[Group, Node], single_platform: str = None
 ) -> bool:
     """Check if the node matches the Insteon type for any platforms.
 
@@ -102,7 +104,7 @@ def _check_for_insteon_type(
 
             # FanLinc, which has a light module as one of its nodes.
             if platform == FAN and subnode_id == SUBNODE_FANLINC_LIGHT:
-                hass.data[ISY994_NODES][LIGHT].append(node)
+                hass_isy_data[ISY994_NODES][LIGHT].append(node)
                 return True
 
             # IOLincs which have a sensor and relay on 2 different nodes
@@ -111,7 +113,7 @@ def _check_for_insteon_type(
                 and device_type.startswith(TYPE_CATEGORY_SENSOR_ACTUATORS)
                 and subnode_id == SUBNODE_IOLINC_RELAY
             ):
-                hass.data[ISY994_NODES][SWITCH].append(node)
+                hass_isy_data[ISY994_NODES][SWITCH].append(node)
                 return True
 
             # Smartenit EZIO2X4
@@ -120,17 +122,17 @@ def _check_for_insteon_type(
                 and device_type.startswith(TYPE_EZIO2X4)
                 and subnode_id in SUBNODE_EZIO2X4_SENSORS
             ):
-                hass.data[ISY994_NODES][BINARY_SENSOR].append(node)
+                hass_isy_data[ISY994_NODES][BINARY_SENSOR].append(node)
                 return True
 
-            hass.data[ISY994_NODES][platform].append(node)
+            hass_isy_data[ISY994_NODES][platform].append(node)
             return True
 
     return False
 
 
 def _check_for_zwave_cat(
-    hass: HomeAssistantType, node: Union[Group, Node], single_platform: str = None
+    hass_isy_data: dict, node: Union[Group, Node], single_platform: str = None
 ) -> bool:
     """Check if the node matches the ISY Z-Wave Category for any platforms.
 
@@ -154,14 +156,14 @@ def _check_for_zwave_cat(
             ]
         ):
 
-            hass.data[ISY994_NODES][platform].append(node)
+            hass_isy_data[ISY994_NODES][platform].append(node)
             return True
 
     return False
 
 
 def _check_for_uom_id(
-    hass: HomeAssistantType,
+    hass_isy_data: dict,
     node: Union[Group, Node],
     single_platform: str = None,
     uom_list: list = None,
@@ -182,21 +184,21 @@ def _check_for_uom_id(
 
     if uom_list:
         if node_uom in uom_list:
-            hass.data[ISY994_NODES][single_platform].append(node)
+            hass_isy_data[ISY994_NODES][single_platform].append(node)
             return True
         return False
 
     platforms = SUPPORTED_PLATFORMS if not single_platform else [single_platform]
     for platform in platforms:
         if node_uom in NODE_FILTERS[platform][FILTER_UOM]:
-            hass.data[ISY994_NODES][platform].append(node)
+            hass_isy_data[ISY994_NODES][platform].append(node)
             return True
 
     return False
 
 
 def _check_for_states_in_uom(
-    hass: HomeAssistantType,
+    hass_isy_data: dict,
     node: Union[Group, Node],
     single_platform: str = None,
     states_list: list = None,
@@ -219,26 +221,24 @@ def _check_for_states_in_uom(
 
     if states_list:
         if node_uom == set(states_list):
-            hass.data[ISY994_NODES][single_platform].append(node)
+            hass_isy_data[ISY994_NODES][single_platform].append(node)
             return True
         return False
 
     platforms = SUPPORTED_PLATFORMS if not single_platform else [single_platform]
     for platform in platforms:
         if node_uom == set(NODE_FILTERS[platform][FILTER_STATES]):
-            hass.data[ISY994_NODES][platform].append(node)
+            hass_isy_data[ISY994_NODES][platform].append(node)
             return True
 
     return False
 
 
-def _is_sensor_a_binary_sensor(
-    hass: HomeAssistantType, node: Union[Group, Node]
-) -> bool:
+def _is_sensor_a_binary_sensor(hass_isy_data: dict, node: Union[Group, Node]) -> bool:
     """Determine if the given sensor node should be a binary_sensor."""
-    if _check_for_node_def(hass, node, single_platform=BINARY_SENSOR):
+    if _check_for_node_def(hass_isy_data, node, single_platform=BINARY_SENSOR):
         return True
-    if _check_for_insteon_type(hass, node, single_platform=BINARY_SENSOR):
+    if _check_for_insteon_type(hass_isy_data, node, single_platform=BINARY_SENSOR):
         return True
 
     # For the next two checks, we're providing our own set of uoms that
@@ -246,11 +246,14 @@ def _is_sensor_a_binary_sensor(
     # checks in the context of already knowing that this is definitely a
     # sensor device.
     if _check_for_uom_id(
-        hass, node, single_platform=BINARY_SENSOR, uom_list=BINARY_SENSOR_UOMS
+        hass_isy_data, node, single_platform=BINARY_SENSOR, uom_list=BINARY_SENSOR_UOMS
     ):
         return True
     if _check_for_states_in_uom(
-        hass, node, single_platform=BINARY_SENSOR, states_list=BINARY_SENSOR_ISY_STATES
+        hass_isy_data,
+        node,
+        single_platform=BINARY_SENSOR,
+        states_list=BINARY_SENSOR_ISY_STATES,
     ):
         return True
 
@@ -258,10 +261,7 @@ def _is_sensor_a_binary_sensor(
 
 
 def _categorize_nodes(
-    hass: HomeAssistantType,
-    nodes: Nodes,
-    ignore_identifier: str,
-    sensor_identifier: str,
+    hass_isy_data: dict, nodes: Nodes, ignore_identifier: str, sensor_identifier: str
 ) -> None:
     """Sort the nodes to their proper platforms."""
     for (path, node) in nodes:
@@ -271,37 +271,36 @@ def _categorize_nodes(
             continue
 
         if hasattr(node, "protocol") and node.protocol == PROTO_GROUP:
-            hass.data[ISY994_NODES][ISY_GROUP_PLATFORM].append(node)
+            hass_isy_data[ISY994_NODES][ISY_GROUP_PLATFORM].append(node)
             continue
 
         if sensor_identifier in path or sensor_identifier in node.name:
             # User has specified to treat this as a sensor. First we need to
             # determine if it should be a binary_sensor.
-            if _is_sensor_a_binary_sensor(hass, node):
+            if _is_sensor_a_binary_sensor(hass_isy_data, node):
                 continue
-
-            hass.data[ISY994_NODES][SENSOR].append(node)
+            hass_isy_data[ISY994_NODES][SENSOR].append(node)
             continue
 
         # We have a bunch of different methods for determining the device type,
         # each of which works with different ISY firmware versions or device
         # family. The order here is important, from most reliable to least.
-        if _check_for_node_def(hass, node):
+        if _check_for_node_def(hass_isy_data, node):
             continue
-        if _check_for_insteon_type(hass, node):
+        if _check_for_insteon_type(hass_isy_data, node):
             continue
-        if _check_for_zwave_cat(hass, node):
+        if _check_for_zwave_cat(hass_isy_data, node):
             continue
-        if _check_for_uom_id(hass, node):
+        if _check_for_uom_id(hass_isy_data, node):
             continue
-        if _check_for_states_in_uom(hass, node):
+        if _check_for_states_in_uom(hass_isy_data, node):
             continue
 
         # Fallback as as sensor, e.g. for un-sortable items like NodeServer nodes.
-        hass.data[ISY994_NODES][SENSOR].append(node)
+        hass_isy_data[ISY994_NODES][SENSOR].append(node)
 
 
-def _categorize_programs(hass: HomeAssistantType, programs: Programs) -> None:
+def _categorize_programs(hass_isy_data: dict, programs: Programs) -> None:
     """Categorize the ISY994 programs."""
     for platform in SUPPORTED_PROGRAM_PLATFORMS:
         folder = programs.get_by_name(f"{DEFAULT_PROGRAM_STRING}{platform}")
@@ -334,4 +333,36 @@ def _categorize_programs(hass: HomeAssistantType, programs: Programs) -> None:
                     continue
 
             entity = (entity_folder.name, status, actions)
-            hass.data[ISY994_PROGRAMS][platform].append(entity)
+            hass_isy_data[ISY994_PROGRAMS][platform].append(entity)
+
+
+async def migrate_old_unique_ids(
+    hass: HomeAssistantType, platform: str, devices: Optional[List[Any]]
+) -> None:
+    """Migrate to new controller-specific unique ids."""
+    registry = await async_get_registry(hass)
+
+    for device in devices:
+        old_entity_id = registry.async_get_entity_id(
+            platform, DOMAIN, device.old_unique_id
+        )
+        if old_entity_id is not None:
+            _LOGGER.debug(
+                "Migrating unique_id from [%s] to [%s]",
+                device.old_unique_id,
+                device.unique_id,
+            )
+            registry.async_update_entity(old_entity_id, new_unique_id=device.unique_id)
+
+        old_entity_id_2 = registry.async_get_entity_id(
+            platform, DOMAIN, device.unique_id.replace(":", "")
+        )
+        if old_entity_id_2 is not None:
+            _LOGGER.debug(
+                "Migrating unique_id from [%s] to [%s]",
+                device.unique_id.replace(":", ""),
+                device.unique_id,
+            )
+            registry.async_update_entity(
+                old_entity_id_2, new_unique_id=device.unique_id
+            )
diff --git a/homeassistant/components/isy994/light.py b/homeassistant/components/isy994/light.py
index 257ecd853f866..1721a2a27f216 100644
--- a/homeassistant/components/isy994/light.py
+++ b/homeassistant/components/isy994/light.py
@@ -8,35 +8,49 @@
     SUPPORT_BRIGHTNESS,
     LightEntity,
 )
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import STATE_UNKNOWN
 from homeassistant.helpers.restore_state import RestoreEntity
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import HomeAssistantType
 
-from . import ISY994_NODES
-from .const import _LOGGER
+from .const import (
+    _LOGGER,
+    CONF_RESTORE_LIGHT_STATE,
+    DOMAIN as ISY994_DOMAIN,
+    ISY994_NODES,
+)
 from .entity import ISYNodeEntity
+from .helpers import migrate_old_unique_ids
 
 ATTR_LAST_BRIGHTNESS = "last_brightness"
 
 
-def setup_platform(
-    hass, config: ConfigType, add_entities: Callable[[list], None], discovery_info=None
-):
+async def async_setup_entry(
+    hass: HomeAssistantType,
+    entry: ConfigEntry,
+    async_add_entities: Callable[[list], None],
+) -> bool:
     """Set up the ISY994 light platform."""
+    hass_isy_data = hass.data[ISY994_DOMAIN][entry.entry_id]
+    isy_options = entry.options
+    restore_light_state = isy_options.get(CONF_RESTORE_LIGHT_STATE, False)
+
     devices = []
-    for node in hass.data[ISY994_NODES][LIGHT]:
-        devices.append(ISYLightEntity(node))
+    for node in hass_isy_data[ISY994_NODES][LIGHT]:
+        devices.append(ISYLightEntity(node, restore_light_state))
 
-    add_entities(devices)
+    await migrate_old_unique_ids(hass, LIGHT, devices)
+    async_add_entities(devices)
 
 
 class ISYLightEntity(ISYNodeEntity, LightEntity, RestoreEntity):
     """Representation of an ISY994 light device."""
 
-    def __init__(self, node) -> None:
+    def __init__(self, node, restore_light_state) -> None:
         """Initialize the ISY994 light device."""
         super().__init__(node)
         self._last_brightness = None
+        self._restore_light_state = restore_light_state
 
     @property
     def is_on(self) -> bool:
@@ -65,16 +79,11 @@ def on_update(self, event: object) -> None:
     # pylint: disable=arguments-differ
     def turn_on(self, brightness=None, **kwargs) -> None:
         """Send the turn on command to the ISY994 light device."""
-        if brightness is None and self._last_brightness:
+        if self._restore_light_state and brightness is None and self._last_brightness:
             brightness = self._last_brightness
         if not self._node.turn_on(val=brightness):
             _LOGGER.debug("Unable to turn on light")
 
-    @property
-    def supported_features(self):
-        """Flag supported features."""
-        return SUPPORT_BRIGHTNESS
-
     @property
     def device_state_attributes(self) -> Dict:
         """Return the light attributes."""
@@ -82,6 +91,11 @@ def device_state_attributes(self) -> Dict:
         attribs[ATTR_LAST_BRIGHTNESS] = self._last_brightness
         return attribs
 
+    @property
+    def supported_features(self):
+        """Flag supported features."""
+        return SUPPORT_BRIGHTNESS
+
     async def async_added_to_hass(self) -> None:
         """Restore last_brightness on restart."""
         await super().async_added_to_hass()
diff --git a/homeassistant/components/isy994/lock.py b/homeassistant/components/isy994/lock.py
index 22cd5e08e4415..29cb3705de959 100644
--- a/homeassistant/components/isy994/lock.py
+++ b/homeassistant/components/isy994/lock.py
@@ -4,28 +4,33 @@
 from pyisy.constants import ISY_VALUE_UNKNOWN
 
 from homeassistant.components.lock import DOMAIN as LOCK, LockEntity
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import STATE_LOCKED, STATE_UNKNOWN, STATE_UNLOCKED
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import HomeAssistantType
 
-from . import ISY994_NODES, ISY994_PROGRAMS
-from .const import _LOGGER
+from .const import _LOGGER, DOMAIN as ISY994_DOMAIN, ISY994_NODES, ISY994_PROGRAMS
 from .entity import ISYNodeEntity, ISYProgramEntity
+from .helpers import migrate_old_unique_ids
 
 VALUE_TO_STATE = {0: STATE_UNLOCKED, 100: STATE_LOCKED}
 
 
-def setup_platform(
-    hass, config: ConfigType, add_entities: Callable[[list], None], discovery_info=None
-):
+async def async_setup_entry(
+    hass: HomeAssistantType,
+    entry: ConfigEntry,
+    async_add_entities: Callable[[list], None],
+) -> bool:
     """Set up the ISY994 lock platform."""
+    hass_isy_data = hass.data[ISY994_DOMAIN][entry.entry_id]
     devices = []
-    for node in hass.data[ISY994_NODES][LOCK]:
+    for node in hass_isy_data[ISY994_NODES][LOCK]:
         devices.append(ISYLockEntity(node))
 
-    for name, status, actions in hass.data[ISY994_PROGRAMS][LOCK]:
+    for name, status, actions in hass_isy_data[ISY994_PROGRAMS][LOCK]:
         devices.append(ISYLockProgramEntity(name, status, actions))
 
-    add_entities(devices)
+    await migrate_old_unique_ids(hass, LOCK, devices)
+    async_add_entities(devices)
 
 
 class ISYLockEntity(ISYNodeEntity, LockEntity):
diff --git a/homeassistant/components/isy994/manifest.json b/homeassistant/components/isy994/manifest.json
index e132b7043e661..b05aae8e1c65c 100644
--- a/homeassistant/components/isy994/manifest.json
+++ b/homeassistant/components/isy994/manifest.json
@@ -3,5 +3,6 @@
   "name": "Universal Devices ISY994",
   "documentation": "https://www.home-assistant.io/integrations/isy994",
   "requirements": ["pyisy==2.0.2"],
-  "codeowners": ["@bdraco", "@shbatm"]
+  "codeowners": ["@bdraco", "@shbatm"],
+  "config_flow": true
 }
diff --git a/homeassistant/components/isy994/sensor.py b/homeassistant/components/isy994/sensor.py
index b9144c8bcd1fd..838020026dbd1 100644
--- a/homeassistant/components/isy994/sensor.py
+++ b/homeassistant/components/isy994/sensor.py
@@ -4,25 +4,36 @@
 from pyisy.constants import ISY_VALUE_UNKNOWN
 
 from homeassistant.components.sensor import DOMAIN as SENSOR
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import STATE_UNKNOWN, TEMP_CELSIUS, TEMP_FAHRENHEIT
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import HomeAssistantType
 
-from . import ISY994_NODES
-from .const import _LOGGER, UOM_FRIENDLY_NAME, UOM_TO_STATES
+from .const import (
+    _LOGGER,
+    DOMAIN as ISY994_DOMAIN,
+    ISY994_NODES,
+    UOM_FRIENDLY_NAME,
+    UOM_TO_STATES,
+)
 from .entity import ISYNodeEntity
+from .helpers import migrate_old_unique_ids
 
 
-def setup_platform(
-    hass, config: ConfigType, add_entities: Callable[[list], None], discovery_info=None
-):
+async def async_setup_entry(
+    hass: HomeAssistantType,
+    entry: ConfigEntry,
+    async_add_entities: Callable[[list], None],
+) -> bool:
     """Set up the ISY994 sensor platform."""
+    hass_isy_data = hass.data[ISY994_DOMAIN][entry.entry_id]
     devices = []
 
-    for node in hass.data[ISY994_NODES][SENSOR]:
+    for node in hass_isy_data[ISY994_NODES][SENSOR]:
         _LOGGER.debug("Loading %s", node.name)
         devices.append(ISYSensorEntity(node))
 
-    add_entities(devices)
+    await migrate_old_unique_ids(hass, SENSOR, devices)
+    async_add_entities(devices)
 
 
 class ISYSensorEntity(ISYNodeEntity):
diff --git a/homeassistant/components/isy994/strings.json b/homeassistant/components/isy994/strings.json
new file mode 100644
index 0000000000000..11f1dcfb2b0db
--- /dev/null
+++ b/homeassistant/components/isy994/strings.json
@@ -0,0 +1,39 @@
+{
+  "title": "Universal Devices ISY994",
+  "config": {
+    "step": {
+      "user": {
+        "data": {
+          "username": "[%key:common::config_flow::data::username%]",
+          "host": "URL",
+          "password": "[%key:common::config_flow::data::password%]",
+          "tls": "The TLS version of the ISY controller."
+        },
+        "description": "The host entry must be in full URL format, e.g., http://192.168.10.100:80",
+        "title": "Connect to your ISY994"
+      }
+    },
+    "error": {
+      "unknown": "[%key:common::config_flow::error::unknown%",
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
+      "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
+      "invalid_host": "The host entry was not in full URL format, e.g., http://192.168.10.100:80"
+    },
+    "abort": {
+      "already_configured": "[%key:common::config_flow::abort::already_configured_device%"
+    }
+  },
+  "options": {
+    "step": {
+      "init": {
+        "title": "ISY994 Options",
+        "description": "Set the options for the ISY Integration: \n • Node Sensor String: Any device or folder that contains 'Node Sensor String' in the name will be treated as a sensor or binary sensor. \n • Ignore String: Any device with 'Ignore String' in the name will be ignored.  \n • Restore Light Brightness: If enabled, the previous brightness will be restored when turning on a light instead of the device's built-in On-Level.",
+        "data": {
+          "sensor_string": "Node Sensor String",
+          "ignore_string": "Ignore String",
+          "restore_light_state": "Restore Light Brightness"
+        }
+      }
+    }
+  }
+}
diff --git a/homeassistant/components/isy994/switch.py b/homeassistant/components/isy994/switch.py
index 64f7c840054e5..fadc493505fd1 100644
--- a/homeassistant/components/isy994/switch.py
+++ b/homeassistant/components/isy994/switch.py
@@ -4,26 +4,31 @@
 from pyisy.constants import ISY_VALUE_UNKNOWN, PROTO_GROUP
 
 from homeassistant.components.switch import DOMAIN as SWITCH, SwitchEntity
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import STATE_UNKNOWN
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import HomeAssistantType
 
-from . import ISY994_NODES, ISY994_PROGRAMS
-from .const import _LOGGER
+from .const import _LOGGER, DOMAIN as ISY994_DOMAIN, ISY994_NODES, ISY994_PROGRAMS
 from .entity import ISYNodeEntity, ISYProgramEntity
+from .helpers import migrate_old_unique_ids
 
 
-def setup_platform(
-    hass, config: ConfigType, add_entities: Callable[[list], None], discovery_info=None
-):
+async def async_setup_entry(
+    hass: HomeAssistantType,
+    entry: ConfigEntry,
+    async_add_entities: Callable[[list], None],
+) -> bool:
     """Set up the ISY994 switch platform."""
+    hass_isy_data = hass.data[ISY994_DOMAIN][entry.entry_id]
     devices = []
-    for node in hass.data[ISY994_NODES][SWITCH]:
+    for node in hass_isy_data[ISY994_NODES][SWITCH]:
         devices.append(ISYSwitchEntity(node))
 
-    for name, status, actions in hass.data[ISY994_PROGRAMS][SWITCH]:
+    for name, status, actions in hass_isy_data[ISY994_PROGRAMS][SWITCH]:
         devices.append(ISYSwitchProgramEntity(name, status, actions))
 
-    add_entities(devices)
+    await migrate_old_unique_ids(hass, SWITCH, devices)
+    async_add_entities(devices)
 
 
 class ISYSwitchEntity(ISYNodeEntity, SwitchEntity):
diff --git a/homeassistant/components/isy994/translations/en.json b/homeassistant/components/isy994/translations/en.json
new file mode 100644
index 0000000000000..4ad14d99c6319
--- /dev/null
+++ b/homeassistant/components/isy994/translations/en.json
@@ -0,0 +1,39 @@
+{
+  "title": "Universal Devices ISY994",
+  "config": {
+    "step": {
+      "user": {
+        "data": {
+          "username": "Username",
+          "host": "URL",
+          "password": "Password",
+          "tls": "The TLS version of the ISY controller."
+        },
+        "description": "The host entry must be in full URL format, e.g., http://192.168.10.100:80",
+        "title": "Connect to your ISY994"
+      }
+    },
+    "error": {
+      "unknown": "Unexpected error",
+      "cannot_connect": "Failed to connect, please try again",
+      "invalid_auth": "Invalid authentication",
+      "invalid_host": "The host entry was not in full URL format, e.g., http://192.168.10.100:80"
+    },
+    "abort": {
+      "already_configured": "Device is already configured"
+    }
+  },
+  "options": {
+    "step": {
+      "init": {
+        "title": "ISY994 Options",
+        "description": "Set the options for the ISY Integration: \n • Node Sensor String: Any device or folder that contains 'Node Sensor String' in the name will be treated as a sensor or binary sensor. \n • Ignore String: Any device with 'Ignore String' in the name will be ignored.  \n • Restore Light Brightness: If enabled, the previous brightness will be restored when turning on a light instead of the device's built-in On-Level.",
+        "data": {
+          "sensor_string": "Node Sensor String",
+          "ignore_string": "Ignore String",
+          "restore_light_state": "Restore Light Brightness"
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/homeassistant/generated/config_flows.py b/homeassistant/generated/config_flows.py
index bfc5d8baef4af..528092a6c604e 100644
--- a/homeassistant/generated/config_flows.py
+++ b/homeassistant/generated/config_flows.py
@@ -68,6 +68,7 @@
     "ipp",
     "iqvia",
     "islamic_prayer_times",
+    "isy994",
     "izone",
     "juicenet",
     "konnected",
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 75441d77e1733..1cc2af2cb1b27 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -572,6 +572,9 @@ pyipp==0.10.1
 # homeassistant.components.iqvia
 pyiqvia==0.2.1
 
+# homeassistant.components.isy994
+pyisy==2.0.2
+
 # homeassistant.components.kira
 pykira==0.1.1
 
diff --git a/tests/components/isy994/__init__.py b/tests/components/isy994/__init__.py
new file mode 100644
index 0000000000000..9aee1e159051f
--- /dev/null
+++ b/tests/components/isy994/__init__.py
@@ -0,0 +1 @@
+"""Tests for the Universal Devices ISY994 integration."""
diff --git a/tests/components/isy994/test_config_flow.py b/tests/components/isy994/test_config_flow.py
new file mode 100644
index 0000000000000..c9c914b5a7992
--- /dev/null
+++ b/tests/components/isy994/test_config_flow.py
@@ -0,0 +1,206 @@
+"""Test the Universal Devices ISY994 config flow."""
+
+from homeassistant import config_entries, data_entry_flow, setup
+from homeassistant.components.isy994.config_flow import CannotConnect
+from homeassistant.components.isy994.const import (
+    CONF_IGNORE_STRING,
+    CONF_RESTORE_LIGHT_STATE,
+    CONF_SENSOR_STRING,
+    CONF_TLS_VER,
+    DOMAIN,
+)
+from homeassistant.config_entries import SOURCE_IMPORT
+from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME
+from homeassistant.helpers.typing import HomeAssistantType
+
+from tests.async_mock import patch
+from tests.common import MockConfigEntry
+
+MOCK_HOSTNAME = "1.1.1.1"
+MOCK_USERNAME = "test-username"
+MOCK_PASSWORD = "test-password"
+
+# Don't use the integration defaults here to make sure they're being set correctly.
+MOCK_TLS_VERSION = 1.2
+MOCK_IGNORE_STRING = "{IGNOREME}"
+MOCK_RESTORE_LIGHT_STATE = True
+MOCK_SENSOR_STRING = "IMASENSOR"
+
+MOCK_USER_INPUT = {
+    "host": f"http://{MOCK_HOSTNAME}",
+    "username": MOCK_USERNAME,
+    "password": MOCK_PASSWORD,
+    "tls": MOCK_TLS_VERSION,
+}
+MOCK_IMPORT_BASIC_CONFIG = {
+    CONF_HOST: f"http://{MOCK_HOSTNAME}",
+    CONF_USERNAME: MOCK_USERNAME,
+    CONF_PASSWORD: MOCK_PASSWORD,
+}
+MOCK_IMPORT_FULL_CONFIG = {
+    CONF_HOST: f"http://{MOCK_HOSTNAME}",
+    CONF_USERNAME: MOCK_USERNAME,
+    CONF_PASSWORD: MOCK_PASSWORD,
+    CONF_IGNORE_STRING: MOCK_IGNORE_STRING,
+    CONF_RESTORE_LIGHT_STATE: MOCK_RESTORE_LIGHT_STATE,
+    CONF_SENSOR_STRING: MOCK_SENSOR_STRING,
+    CONF_TLS_VER: MOCK_TLS_VERSION,
+}
+
+MOCK_DEVICE_NAME = "Name of the device"
+MOCK_UUID = "CE:FB:72:31:B7:B9"
+MOCK_VALIDATED_RESPONSE = {"name": MOCK_DEVICE_NAME, "uuid": MOCK_UUID}
+
+PATCH_CONFIGURATION = "homeassistant.components.isy994.config_flow.Configuration"
+PATCH_CONNECTION = "homeassistant.components.isy994.config_flow.Connection"
+PATCH_ASYNC_SETUP = "homeassistant.components.isy994.async_setup"
+PATCH_ASYNC_SETUP_ENTRY = "homeassistant.components.isy994.async_setup_entry"
+
+
+async def test_form(hass: HomeAssistantType):
+    """Test we get the form."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result["errors"] == {}
+
+    with patch(PATCH_CONFIGURATION) as mock_config_class, patch(
+        PATCH_CONNECTION
+    ) as mock_connection_class, patch(
+        PATCH_ASYNC_SETUP, return_value=True
+    ) as mock_setup, patch(
+        PATCH_ASYNC_SETUP_ENTRY, return_value=True,
+    ) as mock_setup_entry:
+        isy_conn = mock_connection_class.return_value
+        isy_conn.get_config.return_value = "<xml></xml>"
+        mock_config_class.return_value = MOCK_VALIDATED_RESPONSE
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"], MOCK_USER_INPUT,
+        )
+    assert result2["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
+    assert result2["title"] == f"{MOCK_DEVICE_NAME} ({MOCK_HOSTNAME})"
+    assert result2["result"].unique_id == MOCK_UUID
+    assert result2["data"] == MOCK_USER_INPUT
+    await hass.async_block_till_done()
+    assert len(mock_setup.mock_calls) == 1
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
+async def test_form_invalid_host(hass: HomeAssistantType):
+    """Test we handle invalid host."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+
+    result2 = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {
+            "host": MOCK_HOSTNAME,  # Test with missing protocol (http://)
+            "username": MOCK_USERNAME,
+            "password": MOCK_PASSWORD,
+            "tls": MOCK_TLS_VERSION,
+        },
+    )
+
+    assert result2["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result2["errors"] == {"base": "invalid_host"}
+
+
+async def test_form_invalid_auth(hass: HomeAssistantType):
+    """Test we handle invalid auth."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    with patch(PATCH_CONFIGURATION), patch(
+        PATCH_CONNECTION, side_effect=ValueError("PyISY could not connect to the ISY."),
+    ):
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"], MOCK_USER_INPUT,
+        )
+
+    assert result2["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result2["errors"] == {"base": "invalid_auth"}
+
+
+async def test_form_cannot_connect(hass: HomeAssistantType):
+    """Test we handle cannot connect error."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    with patch(PATCH_CONFIGURATION), patch(
+        PATCH_CONNECTION, side_effect=CannotConnect,
+    ):
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"], MOCK_USER_INPUT,
+        )
+
+    assert result2["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result2["errors"] == {"base": "cannot_connect"}
+
+
+async def test_form_existing_config_entry(hass: HomeAssistantType):
+    """Test if config entry already exists."""
+    MockConfigEntry(domain=DOMAIN, unique_id=MOCK_UUID).add_to_hass(hass)
+    await setup.async_setup_component(hass, "persistent_notification", {})
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result["errors"] == {}
+
+    with patch(PATCH_CONFIGURATION) as mock_config_class, patch(
+        PATCH_CONNECTION
+    ) as mock_connection_class:
+        isy_conn = mock_connection_class.return_value
+        isy_conn.get_config.return_value = "<xml></xml>"
+        mock_config_class.return_value = MOCK_VALIDATED_RESPONSE
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"], MOCK_USER_INPUT,
+        )
+    assert result2["type"] == data_entry_flow.RESULT_TYPE_ABORT
+
+
+async def test_import_flow_some_fields(hass: HomeAssistantType) -> None:
+    """Test import config flow with just the basic fields."""
+    with patch(PATCH_CONFIGURATION) as mock_config_class, patch(
+        PATCH_CONNECTION
+    ) as mock_connection_class, patch(PATCH_ASYNC_SETUP, return_value=True), patch(
+        PATCH_ASYNC_SETUP_ENTRY, return_value=True,
+    ):
+        isy_conn = mock_connection_class.return_value
+        isy_conn.get_config.return_value = "<xml></xml>"
+        mock_config_class.return_value = MOCK_VALIDATED_RESPONSE
+        result = await hass.config_entries.flow.async_init(
+            DOMAIN, context={"source": SOURCE_IMPORT}, data=MOCK_IMPORT_BASIC_CONFIG,
+        )
+
+    assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
+    assert result["data"][CONF_HOST] == f"http://{MOCK_HOSTNAME}"
+    assert result["data"][CONF_USERNAME] == MOCK_USERNAME
+    assert result["data"][CONF_PASSWORD] == MOCK_PASSWORD
+
+
+async def test_import_flow_all_fields(hass: HomeAssistantType) -> None:
+    """Test import config flow with all fields."""
+    with patch(PATCH_CONFIGURATION) as mock_config_class, patch(
+        PATCH_CONNECTION
+    ) as mock_connection_class, patch(PATCH_ASYNC_SETUP, return_value=True), patch(
+        PATCH_ASYNC_SETUP_ENTRY, return_value=True,
+    ):
+        isy_conn = mock_connection_class.return_value
+        isy_conn.get_config.return_value = "<xml></xml>"
+        mock_config_class.return_value = MOCK_VALIDATED_RESPONSE
+        result = await hass.config_entries.flow.async_init(
+            DOMAIN, context={"source": SOURCE_IMPORT}, data=MOCK_IMPORT_FULL_CONFIG,
+        )
+
+    assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
+    assert result["data"][CONF_HOST] == f"http://{MOCK_HOSTNAME}"
+    assert result["data"][CONF_USERNAME] == MOCK_USERNAME
+    assert result["data"][CONF_PASSWORD] == MOCK_PASSWORD
+    assert result["data"][CONF_IGNORE_STRING] == MOCK_IGNORE_STRING
+    assert result["data"][CONF_RESTORE_LIGHT_STATE] == MOCK_RESTORE_LIGHT_STATE
+    assert result["data"][CONF_SENSOR_STRING] == MOCK_SENSOR_STRING
+    assert result["data"][CONF_TLS_VER] == MOCK_TLS_VERSION