diff --git a/.coveragerc b/.coveragerc
index a8932f54a54..d42d7cbb3b3 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -675,7 +675,11 @@ omit =
     homeassistant/components/tradfri/cover.py
     homeassistant/components/trafikverket_train/sensor.py
     homeassistant/components/trafikverket_weatherstation/sensor.py
-    homeassistant/components/transmission/*
+    homeassistant/components/transmission/__init__.py
+    homeassistant/components/transmission/sensor.py
+    homeassistant/components/transmission/switch.py
+    homeassistant/components/transmission/const.py
+    homeassistant/components/transmission/errors.py
     homeassistant/components/travisci/sensor.py
     homeassistant/components/tuya/*
     homeassistant/components/twentemilieu/const.py
diff --git a/CODEOWNERS b/CODEOWNERS
index 6abb7535574..11b99b42a44 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -288,6 +288,7 @@ homeassistant/components/tplink/* @rytilahti
 homeassistant/components/traccar/* @ludeeus
 homeassistant/components/tradfri/* @ggravlingen
 homeassistant/components/trafikverket_train/* @endor-force
+homeassistant/components/transmission/* @engrbm87
 homeassistant/components/tts/* @robbiet480
 homeassistant/components/twentemilieu/* @frenck
 homeassistant/components/twilio_call/* @robbiet480
diff --git a/homeassistant/components/transmission/.translations/en.json b/homeassistant/components/transmission/.translations/en.json
new file mode 100644
index 00000000000..7160cd109c4
--- /dev/null
+++ b/homeassistant/components/transmission/.translations/en.json
@@ -0,0 +1,40 @@
+{
+    "config": {
+        "title": "Transmission",
+        "step": {
+            "user": {
+                "title": "Setup Transmission Client",
+                "data": {
+                    "name": "Name",
+                    "host": "Host",
+                    "username": "User name",
+                    "password": "Password",
+                    "port": "Port"
+                }
+            },
+            "options": {
+                "title": "Configure Options",
+                "data": {
+                    "scan_interval": "Update frequency"
+                }
+            }
+        },
+        "error": {
+            "wrong_credentials": "Wrong username or password",
+            "cannot_connect": "Unable to Connect to host"
+        },
+        "abort": {
+            "one_instance_allowed": "Only a single instance is necessary."
+        }
+    },
+    "options": {
+        "step": {
+            "init": {
+                "description": "Configure options for Transmission",
+                "data": {
+                    "scan_interval": "Update frequency"
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/homeassistant/components/transmission/__init__.py b/homeassistant/components/transmission/__init__.py
index e7f9b94046d..e6ddd87bdf5 100644
--- a/homeassistant/components/transmission/__init__.py
+++ b/homeassistant/components/transmission/__init__.py
@@ -2,47 +2,38 @@
 from datetime import timedelta
 import logging
 
+import transmissionrpc
+from transmissionrpc.error import TransmissionError
 import voluptuous as vol
 
+from homeassistant.config_entries import SOURCE_IMPORT
 from homeassistant.const import (
     CONF_HOST,
-    CONF_MONITORED_CONDITIONS,
     CONF_NAME,
     CONF_PASSWORD,
     CONF_PORT,
     CONF_SCAN_INTERVAL,
     CONF_USERNAME,
 )
-from homeassistant.helpers import config_validation as cv, discovery
+from homeassistant.exceptions import ConfigEntryNotReady
+from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.dispatcher import dispatcher_send
-from homeassistant.helpers.event import track_time_interval
+from homeassistant.helpers.event import async_track_time_interval
+
+from .const import (
+    ATTR_TORRENT,
+    DATA_TRANSMISSION,
+    DATA_UPDATED,
+    DEFAULT_NAME,
+    DEFAULT_PORT,
+    DEFAULT_SCAN_INTERVAL,
+    DOMAIN,
+    SERVICE_ADD_TORRENT,
+)
+from .errors import AuthenticationError, CannotConnect, UnknownError
 
 _LOGGER = logging.getLogger(__name__)
 
-DOMAIN = "transmission"
-DATA_UPDATED = "transmission_data_updated"
-DATA_TRANSMISSION = "data_transmission"
-
-DEFAULT_NAME = "Transmission"
-DEFAULT_PORT = 9091
-TURTLE_MODE = "turtle_mode"
-
-SENSOR_TYPES = {
-    "active_torrents": ["Active Torrents", None],
-    "current_status": ["Status", None],
-    "download_speed": ["Down Speed", "MB/s"],
-    "paused_torrents": ["Paused Torrents", None],
-    "total_torrents": ["Total Torrents", None],
-    "upload_speed": ["Up Speed", "MB/s"],
-    "completed_torrents": ["Completed Torrents", None],
-    "started_torrents": ["Started Torrents", None],
-}
-
-DEFAULT_SCAN_INTERVAL = timedelta(seconds=120)
-
-ATTR_TORRENT = "torrent"
-
-SERVICE_ADD_TORRENT = "add_torrent"
 
 SERVICE_ADD_TORRENT_SCHEMA = vol.Schema({vol.Required(ATTR_TORRENT): cv.string})
 
@@ -55,13 +46,9 @@ CONFIG_SCHEMA = vol.Schema(
                 vol.Optional(CONF_USERNAME): cv.string,
                 vol.Optional(CONF_PORT, default=DEFAULT_PORT): cv.port,
                 vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
-                vol.Optional(TURTLE_MODE, default=False): cv.boolean,
                 vol.Optional(
                     CONF_SCAN_INTERVAL, default=DEFAULT_SCAN_INTERVAL
                 ): cv.time_period,
-                vol.Optional(
-                    CONF_MONITORED_CONDITIONS, default=["current_status"]
-                ): vol.All(cv.ensure_list, [vol.In(SENSOR_TYPES)]),
             }
         )
     },
@@ -69,70 +56,165 @@ CONFIG_SCHEMA = vol.Schema(
 )
 
 
-def setup(hass, config):
-    """Set up the Transmission Component."""
-    host = config[DOMAIN][CONF_HOST]
-    username = config[DOMAIN].get(CONF_USERNAME)
-    password = config[DOMAIN].get(CONF_PASSWORD)
-    port = config[DOMAIN][CONF_PORT]
-    scan_interval = config[DOMAIN][CONF_SCAN_INTERVAL]
-
-    import transmissionrpc
-    from transmissionrpc.error import TransmissionError
-
-    try:
-        api = transmissionrpc.Client(host, port=port, user=username, password=password)
-        api.session_stats()
-    except TransmissionError as error:
-        if str(error).find("401: Unauthorized"):
-            _LOGGER.error("Credentials for" " Transmission client are not valid")
-        return False
-
-    tm_data = hass.data[DATA_TRANSMISSION] = TransmissionData(hass, config, api)
-
-    tm_data.update()
-    tm_data.init_torrent_list()
-
-    def refresh(event_time):
-        """Get the latest data from Transmission."""
-        tm_data.update()
-
-    track_time_interval(hass, refresh, scan_interval)
-
-    def add_torrent(service):
-        """Add new torrent to download."""
-        torrent = service.data[ATTR_TORRENT]
-        if torrent.startswith(
-            ("http", "ftp:", "magnet:")
-        ) or hass.config.is_allowed_path(torrent):
-            api.add_torrent(torrent)
-        else:
-            _LOGGER.warning(
-                "Could not add torrent: " "unsupported type or no permission"
+async def async_setup(hass, config):
+    """Import the Transmission Component from config."""
+    if not hass.config_entries.async_entries(DOMAIN) and DOMAIN in config:
+        hass.async_create_task(
+            hass.config_entries.flow.async_init(
+                DOMAIN, context={"source": SOURCE_IMPORT}, data=config[DOMAIN]
             )
-
-    hass.services.register(
-        DOMAIN, SERVICE_ADD_TORRENT, add_torrent, schema=SERVICE_ADD_TORRENT_SCHEMA
-    )
-
-    sensorconfig = {
-        "sensors": config[DOMAIN][CONF_MONITORED_CONDITIONS],
-        "client_name": config[DOMAIN][CONF_NAME],
-    }
-
-    discovery.load_platform(hass, "sensor", DOMAIN, sensorconfig, config)
-
-    if config[DOMAIN][TURTLE_MODE]:
-        discovery.load_platform(hass, "switch", DOMAIN, sensorconfig, config)
+        )
 
     return True
 
 
+async def async_setup_entry(hass, config_entry):
+    """Set up the Transmission Component."""
+    if DOMAIN not in hass.data:
+        hass.data[DOMAIN] = {}
+
+    if not config_entry.options:
+        await async_populate_options(hass, config_entry)
+
+    client = TransmissionClient(hass, config_entry)
+    client_id = config_entry.entry_id
+    hass.data[DOMAIN][client_id] = client
+    if not await client.async_setup():
+        return False
+
+    return True
+
+
+async def async_unload_entry(hass, entry):
+    """Unload Transmission Entry from config_entry."""
+    hass.services.async_remove(DOMAIN, SERVICE_ADD_TORRENT)
+    if hass.data[DOMAIN][entry.entry_id].unsub_timer:
+        hass.data[DOMAIN][entry.entry_id].unsub_timer()
+
+    for component in "sensor", "switch":
+        await hass.config_entries.async_forward_entry_unload(entry, component)
+
+    del hass.data[DOMAIN]
+
+    return True
+
+
+async def get_api(hass, host, port, username=None, password=None):
+    """Get Transmission client."""
+    try:
+        api = await hass.async_add_executor_job(
+            transmissionrpc.Client, host, port, username, password
+        )
+        return api
+
+    except TransmissionError as error:
+        if "401: Unauthorized" in str(error):
+            _LOGGER.error("Credentials for Transmission client are not valid")
+            raise AuthenticationError
+        if "111: Connection refused" in str(error):
+            _LOGGER.error("Connecting to the Transmission client failed")
+            raise CannotConnect
+
+        _LOGGER.error(error)
+        raise UnknownError
+
+
+async def async_populate_options(hass, config_entry):
+    """Populate default options for Transmission Client."""
+    options = {CONF_SCAN_INTERVAL: config_entry.data["options"][CONF_SCAN_INTERVAL]}
+
+    hass.config_entries.async_update_entry(config_entry, options=options)
+
+
+class TransmissionClient:
+    """Transmission Client Object."""
+
+    def __init__(self, hass, config_entry):
+        """Initialize the Transmission RPC API."""
+        self.hass = hass
+        self.config_entry = config_entry
+        self.scan_interval = self.config_entry.options[CONF_SCAN_INTERVAL]
+        self.tm_data = None
+        self.unsub_timer = None
+
+    async def async_setup(self):
+        """Set up the Transmission client."""
+
+        config = {
+            CONF_HOST: self.config_entry.data[CONF_HOST],
+            CONF_PORT: self.config_entry.data[CONF_PORT],
+            CONF_USERNAME: self.config_entry.data.get(CONF_USERNAME),
+            CONF_PASSWORD: self.config_entry.data.get(CONF_PASSWORD),
+        }
+        try:
+            api = await get_api(self.hass, **config)
+        except CannotConnect:
+            raise ConfigEntryNotReady
+        except (AuthenticationError, UnknownError):
+            return False
+
+        self.tm_data = self.hass.data[DOMAIN][DATA_TRANSMISSION] = TransmissionData(
+            self.hass, self.config_entry, api
+        )
+
+        await self.hass.async_add_executor_job(self.tm_data.init_torrent_list)
+        await self.hass.async_add_executor_job(self.tm_data.update)
+        self.set_scan_interval(self.scan_interval)
+
+        for platform in ["sensor", "switch"]:
+            self.hass.async_create_task(
+                self.hass.config_entries.async_forward_entry_setup(
+                    self.config_entry, platform
+                )
+            )
+
+        def add_torrent(service):
+            """Add new torrent to download."""
+            torrent = service.data[ATTR_TORRENT]
+            if torrent.startswith(
+                ("http", "ftp:", "magnet:")
+            ) or self.hass.config.is_allowed_path(torrent):
+                api.add_torrent(torrent)
+            else:
+                _LOGGER.warning(
+                    "Could not add torrent: unsupported type or no permission"
+                )
+
+        self.hass.services.async_register(
+            DOMAIN, SERVICE_ADD_TORRENT, add_torrent, schema=SERVICE_ADD_TORRENT_SCHEMA
+        )
+
+        self.config_entry.add_update_listener(self.async_options_updated)
+
+        return True
+
+    def set_scan_interval(self, scan_interval):
+        """Update scan interval."""
+
+        def refresh(event_time):
+            """Get the latest data from Transmission."""
+            self.tm_data.update()
+
+        if self.unsub_timer is not None:
+            self.unsub_timer()
+        self.unsub_timer = async_track_time_interval(
+            self.hass, refresh, timedelta(seconds=scan_interval)
+        )
+
+    @staticmethod
+    async def async_options_updated(hass, entry):
+        """Triggered by config entry options updates."""
+        hass.data[DOMAIN][entry.entry_id].set_scan_interval(
+            entry.options[CONF_SCAN_INTERVAL]
+        )
+
+
 class TransmissionData:
     """Get the latest data and update the states."""
 
     def __init__(self, hass, config, api):
         """Initialize the Transmission RPC API."""
+        self.hass = hass
         self.data = None
         self.torrents = None
         self.session = None
@@ -140,12 +222,9 @@ class TransmissionData:
         self._api = api
         self.completed_torrents = []
         self.started_torrents = []
-        self.hass = hass
 
     def update(self):
         """Get the latest data from Transmission instance."""
-        from transmissionrpc.error import TransmissionError
-
         try:
             self.data = self._api.session_stats()
             self.torrents = self._api.get_torrents()
@@ -153,15 +232,15 @@ class TransmissionData:
 
             self.check_completed_torrent()
             self.check_started_torrent()
+            _LOGGER.debug("Torrent Data Updated")
 
-            dispatcher_send(self.hass, DATA_UPDATED)
-
-            _LOGGER.debug("Torrent Data updated")
             self.available = True
         except TransmissionError:
             self.available = False
             _LOGGER.error("Unable to connect to Transmission client")
 
+        dispatcher_send(self.hass, DATA_UPDATED)
+
     def init_torrent_list(self):
         """Initialize torrent lists."""
         self.torrents = self._api.get_torrents()
@@ -211,6 +290,15 @@ class TransmissionData:
         """Get the number of completed torrents."""
         return len(self.completed_torrents)
 
+    def start_torrents(self):
+        """Start all torrents."""
+        self._api.start_all()
+
+    def stop_torrents(self):
+        """Stop all active torrents."""
+        torrent_ids = [torrent.id for torrent in self.torrents]
+        self._api.stop_torrent(torrent_ids)
+
     def set_alt_speed_enabled(self, is_enabled):
         """Set the alternative speed flag."""
         self._api.set_session(alt_speed_enabled=is_enabled)
diff --git a/homeassistant/components/transmission/config_flow.py b/homeassistant/components/transmission/config_flow.py
new file mode 100644
index 00000000000..99376f4b6e0
--- /dev/null
+++ b/homeassistant/components/transmission/config_flow.py
@@ -0,0 +1,104 @@
+"""Config flow for Transmission Bittorent Client."""
+import voluptuous as vol
+
+from homeassistant import config_entries
+from homeassistant.const import (
+    CONF_HOST,
+    CONF_NAME,
+    CONF_PASSWORD,
+    CONF_PORT,
+    CONF_SCAN_INTERVAL,
+    CONF_USERNAME,
+)
+from homeassistant.core import callback
+
+from . import get_api
+from .const import DEFAULT_NAME, DEFAULT_PORT, DEFAULT_SCAN_INTERVAL, DOMAIN
+from .errors import AuthenticationError, CannotConnect, UnknownError
+
+
+class TransmissionFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
+    """Handle a UniFi config flow."""
+
+    VERSION = 1
+    CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_POLL
+
+    @staticmethod
+    @callback
+    def async_get_options_flow(config_entry):
+        """Get the options flow for this handler."""
+        return TransmissionOptionsFlowHandler(config_entry)
+
+    def __init__(self):
+        """Initialize the Transmission flow."""
+        self.config = {}
+        self.errors = {}
+
+    async def async_step_user(self, user_input=None):
+        """Handle a flow initialized by the user."""
+        if self.hass.config_entries.async_entries(DOMAIN):
+            return self.async_abort(reason="one_instance_allowed")
+
+        if user_input is not None:
+
+            self.config[CONF_NAME] = user_input.pop(CONF_NAME)
+            try:
+                await get_api(self.hass, **user_input)
+                self.config.update(user_input)
+                if "options" not in self.config:
+                    self.config["options"] = {CONF_SCAN_INTERVAL: DEFAULT_SCAN_INTERVAL}
+                return self.async_create_entry(
+                    title=self.config[CONF_NAME], data=self.config
+                )
+            except AuthenticationError:
+                self.errors[CONF_USERNAME] = "wrong_credentials"
+                self.errors[CONF_PASSWORD] = "wrong_credentials"
+            except (CannotConnect, UnknownError):
+                self.errors["base"] = "cannot_connect"
+
+        return self.async_show_form(
+            step_id="user",
+            data_schema=vol.Schema(
+                {
+                    vol.Required(CONF_NAME, default=DEFAULT_NAME): str,
+                    vol.Required(CONF_HOST): str,
+                    vol.Optional(CONF_USERNAME): str,
+                    vol.Optional(CONF_PASSWORD): str,
+                    vol.Required(CONF_PORT, default=DEFAULT_PORT): int,
+                }
+            ),
+            errors=self.errors,
+        )
+
+    async def async_step_import(self, import_config):
+        """Import from Transmission client config."""
+        self.config["options"] = {
+            CONF_SCAN_INTERVAL: import_config.pop(CONF_SCAN_INTERVAL).seconds
+        }
+
+        return await self.async_step_user(user_input=import_config)
+
+
+class TransmissionOptionsFlowHandler(config_entries.OptionsFlow):
+    """Handle Transmission client options."""
+
+    def __init__(self, config_entry):
+        """Initialize Transmission options flow."""
+        self.config_entry = config_entry
+
+    async def async_step_init(self, user_input=None):
+        """Manage the Transmission options."""
+        if user_input is not None:
+            return self.async_create_entry(title="", data=user_input)
+
+        options = {
+            vol.Optional(
+                CONF_SCAN_INTERVAL,
+                default=self.config_entry.options.get(
+                    CONF_SCAN_INTERVAL,
+                    self.config_entry.data["options"][CONF_SCAN_INTERVAL],
+                ),
+            ): int
+        }
+
+        return self.async_show_form(step_id="init", data_schema=vol.Schema(options))
diff --git a/homeassistant/components/transmission/const.py b/homeassistant/components/transmission/const.py
new file mode 100644
index 00000000000..e4a8b1490c2
--- /dev/null
+++ b/homeassistant/components/transmission/const.py
@@ -0,0 +1,24 @@
+"""Constants for the Transmission Bittorent Client component."""
+DOMAIN = "transmission"
+
+SENSOR_TYPES = {
+    "active_torrents": ["Active Torrents", None],
+    "current_status": ["Status", None],
+    "download_speed": ["Down Speed", "MB/s"],
+    "paused_torrents": ["Paused Torrents", None],
+    "total_torrents": ["Total Torrents", None],
+    "upload_speed": ["Up Speed", "MB/s"],
+    "completed_torrents": ["Completed Torrents", None],
+    "started_torrents": ["Started Torrents", None],
+}
+SWITCH_TYPES = {"on_off": "Switch", "turtle_mode": "Turtle Mode"}
+
+DEFAULT_NAME = "Transmission"
+DEFAULT_PORT = 9091
+DEFAULT_SCAN_INTERVAL = 120
+
+ATTR_TORRENT = "torrent"
+SERVICE_ADD_TORRENT = "add_torrent"
+
+DATA_UPDATED = "transmission_data_updated"
+DATA_TRANSMISSION = "data_transmission"
diff --git a/homeassistant/components/transmission/errors.py b/homeassistant/components/transmission/errors.py
new file mode 100644
index 00000000000..b5f74f7bf40
--- /dev/null
+++ b/homeassistant/components/transmission/errors.py
@@ -0,0 +1,14 @@
+"""Errors for the Transmission component."""
+from homeassistant.exceptions import HomeAssistantError
+
+
+class AuthenticationError(HomeAssistantError):
+    """Wrong Username or Password."""
+
+
+class CannotConnect(HomeAssistantError):
+    """Unable to connect to client."""
+
+
+class UnknownError(HomeAssistantError):
+    """Unknown Error."""
diff --git a/homeassistant/components/transmission/manifest.json b/homeassistant/components/transmission/manifest.json
index bc5da64fcac..2bd4571ef93 100644
--- a/homeassistant/components/transmission/manifest.json
+++ b/homeassistant/components/transmission/manifest.json
@@ -1,10 +1,13 @@
 {
   "domain": "transmission",
   "name": "Transmission",
+  "config_flow": true,
   "documentation": "https://www.home-assistant.io/components/transmission",
   "requirements": [
     "transmissionrpc==0.11"
   ],
   "dependencies": [],
-  "codeowners": []
-}
+  "codeowners": [
+    "@engrbm87"
+  ]
+}
\ No newline at end of file
diff --git a/homeassistant/components/transmission/sensor.py b/homeassistant/components/transmission/sensor.py
index ac2e64ce92f..30dfa4a3cbe 100644
--- a/homeassistant/components/transmission/sensor.py
+++ b/homeassistant/components/transmission/sensor.py
@@ -1,32 +1,29 @@
 """Support for monitoring the Transmission BitTorrent client API."""
-from datetime import timedelta
 import logging
 
-from homeassistant.const import STATE_IDLE
+from homeassistant.const import CONF_NAME, STATE_IDLE
 from homeassistant.core import callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity import Entity
 
-from . import DATA_TRANSMISSION, DATA_UPDATED, SENSOR_TYPES
+from .const import DATA_TRANSMISSION, DATA_UPDATED, DOMAIN, SENSOR_TYPES
 
 _LOGGER = logging.getLogger(__name__)
 
-DEFAULT_NAME = "Transmission"
-
-SCAN_INTERVAL = timedelta(seconds=120)
-
 
 async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
-    """Set up the Transmission sensors."""
-    if discovery_info is None:
-        return
+    """Import config from configuration.yaml."""
+    pass
 
-    transmission_api = hass.data[DATA_TRANSMISSION]
-    monitored_variables = discovery_info["sensors"]
-    name = discovery_info["client_name"]
+
+async def async_setup_entry(hass, config_entry, async_add_entities):
+    """Set up the Transmission sensors."""
+
+    transmission_api = hass.data[DOMAIN][DATA_TRANSMISSION]
+    name = config_entry.data[CONF_NAME]
 
     dev = []
-    for sensor_type in monitored_variables:
+    for sensor_type in SENSOR_TYPES:
         dev.append(
             TransmissionSensor(
                 sensor_type,
diff --git a/homeassistant/components/transmission/services.yaml b/homeassistant/components/transmission/services.yaml
index e049f89b3c6..ab383584e83 100644
--- a/homeassistant/components/transmission/services.yaml
+++ b/homeassistant/components/transmission/services.yaml
@@ -3,4 +3,4 @@ add_torrent:
   fields:
     torrent:
       description: URL, magnet link or Base64 encoded file.
-      example: http://releases.ubuntu.com/19.04/ubuntu-19.04-desktop-amd64.iso.torrent}
+      example: http://releases.ubuntu.com/19.04/ubuntu-19.04-desktop-amd64.iso.torrent
diff --git a/homeassistant/components/transmission/strings.json b/homeassistant/components/transmission/strings.json
new file mode 100644
index 00000000000..7160cd109c4
--- /dev/null
+++ b/homeassistant/components/transmission/strings.json
@@ -0,0 +1,40 @@
+{
+    "config": {
+        "title": "Transmission",
+        "step": {
+            "user": {
+                "title": "Setup Transmission Client",
+                "data": {
+                    "name": "Name",
+                    "host": "Host",
+                    "username": "User name",
+                    "password": "Password",
+                    "port": "Port"
+                }
+            },
+            "options": {
+                "title": "Configure Options",
+                "data": {
+                    "scan_interval": "Update frequency"
+                }
+            }
+        },
+        "error": {
+            "wrong_credentials": "Wrong username or password",
+            "cannot_connect": "Unable to Connect to host"
+        },
+        "abort": {
+            "one_instance_allowed": "Only a single instance is necessary."
+        }
+    },
+    "options": {
+        "step": {
+            "init": {
+                "description": "Configure options for Transmission",
+                "data": {
+                    "scan_interval": "Update frequency"
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/homeassistant/components/transmission/switch.py b/homeassistant/components/transmission/switch.py
index df490cdbe47..0bb43f715ac 100644
--- a/homeassistant/components/transmission/switch.py
+++ b/homeassistant/components/transmission/switch.py
@@ -1,43 +1,50 @@
 """Support for setting the Transmission BitTorrent client Turtle Mode."""
 import logging
 
-from homeassistant.const import STATE_OFF, STATE_ON
+from homeassistant.const import CONF_NAME, STATE_OFF, STATE_ON
 from homeassistant.core import callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity import ToggleEntity
 
-from . import DATA_TRANSMISSION, DATA_UPDATED
+from .const import DATA_TRANSMISSION, DATA_UPDATED, DOMAIN, SWITCH_TYPES
 
 _LOGGING = logging.getLogger(__name__)
 
-DEFAULT_NAME = "Transmission Turtle Mode"
-
 
 async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+    """Import config from configuration.yaml."""
+    pass
+
+
+async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up the Transmission switch."""
-    if discovery_info is None:
-        return
 
-    component_name = DATA_TRANSMISSION
-    transmission_api = hass.data[component_name]
-    name = discovery_info["client_name"]
+    transmission_api = hass.data[DOMAIN][DATA_TRANSMISSION]
+    name = config_entry.data[CONF_NAME]
 
-    async_add_entities([TransmissionSwitch(transmission_api, name)], True)
+    dev = []
+    for switch_type, switch_name in SWITCH_TYPES.items():
+        dev.append(TransmissionSwitch(switch_type, switch_name, transmission_api, name))
+
+    async_add_entities(dev, True)
 
 
 class TransmissionSwitch(ToggleEntity):
     """Representation of a Transmission switch."""
 
-    def __init__(self, transmission_client, name):
+    def __init__(self, switch_type, switch_name, transmission_api, name):
         """Initialize the Transmission switch."""
-        self._name = name
-        self.transmission_client = transmission_client
+        self._name = switch_name
+        self.client_name = name
+        self.type = switch_type
+        self._transmission_api = transmission_api
         self._state = STATE_OFF
+        self._data = None
 
     @property
     def name(self):
         """Return the name of the switch."""
-        return self._name
+        return f"{self.client_name} {self._name}"
 
     @property
     def state(self):
@@ -54,15 +61,30 @@ class TransmissionSwitch(ToggleEntity):
         """Return true if device is on."""
         return self._state == STATE_ON
 
+    @property
+    def available(self):
+        """Could the device be accessed during the last update call."""
+        return self._transmission_api.available
+
     def turn_on(self, **kwargs):
         """Turn the device on."""
-        _LOGGING.debug("Turning Turtle Mode of Transmission on")
-        self.transmission_client.set_alt_speed_enabled(True)
+        if self.type == "on_off":
+            _LOGGING.debug("Starting all torrents")
+            self._transmission_api.start_torrents()
+        elif self.type == "turtle_mode":
+            _LOGGING.debug("Turning Turtle Mode of Transmission on")
+            self._transmission_api.set_alt_speed_enabled(True)
+        self._transmission_api.update()
 
     def turn_off(self, **kwargs):
         """Turn the device off."""
-        _LOGGING.debug("Turning Turtle Mode of Transmission off")
-        self.transmission_client.set_alt_speed_enabled(False)
+        if self.type == "on_off":
+            _LOGGING.debug("Stoping all torrents")
+            self._transmission_api.stop_torrents()
+        if self.type == "turtle_mode":
+            _LOGGING.debug("Turning Turtle Mode of Transmission off")
+            self._transmission_api.set_alt_speed_enabled(False)
+        self._transmission_api.update()
 
     async def async_added_to_hass(self):
         """Handle entity which will be added."""
@@ -76,7 +98,14 @@ class TransmissionSwitch(ToggleEntity):
 
     def update(self):
         """Get the latest data from Transmission and updates the state."""
-        active = self.transmission_client.get_alt_speed_enabled()
+        active = None
+        if self.type == "on_off":
+            self._data = self._transmission_api.data
+            if self._data:
+                active = self._data.activeTorrentCount > 0
+
+        elif self.type == "turtle_mode":
+            active = self._transmission_api.get_alt_speed_enabled()
 
         if active is None:
             return
diff --git a/homeassistant/generated/config_flows.py b/homeassistant/generated/config_flows.py
index b6865f9e86a..ab7b339e582 100644
--- a/homeassistant/generated/config_flows.py
+++ b/homeassistant/generated/config_flows.py
@@ -62,6 +62,7 @@ FLOWS = [
     "tplink",
     "traccar",
     "tradfri",
+    "transmission",
     "twentemilieu",
     "twilio",
     "unifi",
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index d42120c339e..d790a423de3 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -422,6 +422,9 @@ statsd==3.2.1
 # homeassistant.components.toon
 toonapilib==3.2.4
 
+# homeassistant.components.transmission
+transmissionrpc==0.11
+
 # homeassistant.components.twentemilieu
 twentemilieu==0.1.0
 
diff --git a/script/gen_requirements_all.py b/script/gen_requirements_all.py
index fcb265bbc97..1e484e0dfc4 100755
--- a/script/gen_requirements_all.py
+++ b/script/gen_requirements_all.py
@@ -173,6 +173,7 @@ TEST_REQUIREMENTS = (
     "srpenergy",
     "statsd",
     "toonapilib",
+    "transmissionrpc",
     "twentemilieu",
     "uvcclient",
     "vsure",
diff --git a/tests/components/transmission/__init__.py b/tests/components/transmission/__init__.py
new file mode 100644
index 00000000000..b8f8d8c847f
--- /dev/null
+++ b/tests/components/transmission/__init__.py
@@ -0,0 +1 @@
+"""Tests for Transmission."""
diff --git a/tests/components/transmission/test_config_flow.py b/tests/components/transmission/test_config_flow.py
new file mode 100644
index 00000000000..e79f5c8ac96
--- /dev/null
+++ b/tests/components/transmission/test_config_flow.py
@@ -0,0 +1,245 @@
+"""Tests for Met.no config flow."""
+from datetime import timedelta
+from unittest.mock import patch
+
+import pytest
+from transmissionrpc.error import TransmissionError
+
+from homeassistant import data_entry_flow
+from homeassistant.components.transmission import config_flow
+from homeassistant.components.transmission.const import (
+    DEFAULT_NAME,
+    DEFAULT_PORT,
+    DEFAULT_SCAN_INTERVAL,
+    DOMAIN,
+)
+from homeassistant.const import (
+    CONF_HOST,
+    CONF_NAME,
+    CONF_PASSWORD,
+    CONF_PORT,
+    CONF_SCAN_INTERVAL,
+    CONF_USERNAME,
+)
+
+from tests.common import MockConfigEntry
+
+NAME = "Transmission"
+HOST = "192.168.1.100"
+USERNAME = "username"
+PASSWORD = "password"
+PORT = 9091
+SCAN_INTERVAL = 10
+
+
+@pytest.fixture(name="api")
+def mock_transmission_api():
+    """Mock an api."""
+    with patch("transmissionrpc.Client"):
+        yield
+
+
+@pytest.fixture(name="auth_error")
+def mock_api_authentication_error():
+    """Mock an api."""
+    with patch(
+        "transmissionrpc.Client", side_effect=TransmissionError("401: Unauthorized")
+    ):
+        yield
+
+
+@pytest.fixture(name="conn_error")
+def mock_api_connection_error():
+    """Mock an api."""
+    with patch(
+        "transmissionrpc.Client",
+        side_effect=TransmissionError("111: Connection refused"),
+    ):
+        yield
+
+
+@pytest.fixture(name="unknown_error")
+def mock_api_unknown_error():
+    """Mock an api."""
+    with patch("transmissionrpc.Client", side_effect=TransmissionError):
+        yield
+
+
+def init_config_flow(hass):
+    """Init a configuration flow."""
+    flow = config_flow.TransmissionFlowHandler()
+    flow.hass = hass
+    return flow
+
+
+async def test_flow_works(hass, api):
+    """Test user config."""
+    flow = init_config_flow(hass)
+
+    result = await flow.async_step_user()
+    assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result["step_id"] == "user"
+
+    # test with required fields only
+    result = await flow.async_step_user(
+        {CONF_NAME: NAME, CONF_HOST: HOST, CONF_PORT: PORT}
+    )
+
+    assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
+    assert result["title"] == NAME
+    assert result["data"][CONF_NAME] == NAME
+    assert result["data"][CONF_HOST] == HOST
+    assert result["data"][CONF_PORT] == PORT
+    assert result["data"]["options"][CONF_SCAN_INTERVAL] == DEFAULT_SCAN_INTERVAL
+
+    # test with all provided
+    result = await flow.async_step_user(
+        {
+            CONF_NAME: NAME,
+            CONF_HOST: HOST,
+            CONF_USERNAME: USERNAME,
+            CONF_PASSWORD: PASSWORD,
+            CONF_PORT: PORT,
+        }
+    )
+
+    assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
+    assert result["title"] == NAME
+    assert result["data"][CONF_NAME] == NAME
+    assert result["data"][CONF_HOST] == HOST
+    assert result["data"][CONF_USERNAME] == USERNAME
+    assert result["data"][CONF_PASSWORD] == PASSWORD
+    assert result["data"][CONF_PORT] == PORT
+    assert result["data"]["options"][CONF_SCAN_INTERVAL] == DEFAULT_SCAN_INTERVAL
+
+
+async def test_options(hass):
+    """Test updating options."""
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        title=CONF_NAME,
+        data={
+            "name": DEFAULT_NAME,
+            "host": HOST,
+            "username": USERNAME,
+            "password": PASSWORD,
+            "port": DEFAULT_PORT,
+            "options": {CONF_SCAN_INTERVAL: DEFAULT_SCAN_INTERVAL},
+        },
+        options={CONF_SCAN_INTERVAL: DEFAULT_SCAN_INTERVAL},
+    )
+    flow = init_config_flow(hass)
+    options_flow = flow.async_get_options_flow(entry)
+
+    result = await options_flow.async_step_init()
+    assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result["step_id"] == "init"
+    result = await options_flow.async_step_init({CONF_SCAN_INTERVAL: 10})
+    assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
+    assert result["data"][CONF_SCAN_INTERVAL] == 10
+
+
+async def test_import(hass, api):
+    """Test import step."""
+    flow = init_config_flow(hass)
+
+    # import with minimum fields only
+    result = await flow.async_step_import(
+        {
+            CONF_NAME: DEFAULT_NAME,
+            CONF_HOST: HOST,
+            CONF_PORT: DEFAULT_PORT,
+            CONF_SCAN_INTERVAL: timedelta(seconds=DEFAULT_SCAN_INTERVAL),
+        }
+    )
+    assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
+    assert result["title"] == DEFAULT_NAME
+    assert result["data"][CONF_NAME] == DEFAULT_NAME
+    assert result["data"][CONF_HOST] == HOST
+    assert result["data"][CONF_PORT] == DEFAULT_PORT
+    assert result["data"]["options"][CONF_SCAN_INTERVAL] == DEFAULT_SCAN_INTERVAL
+
+    # import with all
+    result = await flow.async_step_import(
+        {
+            CONF_NAME: NAME,
+            CONF_HOST: HOST,
+            CONF_USERNAME: USERNAME,
+            CONF_PASSWORD: PASSWORD,
+            CONF_PORT: PORT,
+            CONF_SCAN_INTERVAL: timedelta(seconds=SCAN_INTERVAL),
+        }
+    )
+    assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
+    assert result["title"] == NAME
+    assert result["data"][CONF_NAME] == NAME
+    assert result["data"][CONF_HOST] == HOST
+    assert result["data"][CONF_USERNAME] == USERNAME
+    assert result["data"][CONF_PASSWORD] == PASSWORD
+    assert result["data"][CONF_PORT] == PORT
+    assert result["data"]["options"][CONF_SCAN_INTERVAL] == SCAN_INTERVAL
+
+
+async def test_integration_already_exists(hass, api):
+    """Test we only allow a single config flow."""
+    MockConfigEntry(domain=DOMAIN).add_to_hass(hass)
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": "user"}
+    )
+    assert result["type"] == "abort"
+    assert result["reason"] == "one_instance_allowed"
+
+
+async def test_error_on_wrong_credentials(hass, auth_error):
+    """Test with wrong credentials."""
+    flow = init_config_flow(hass)
+
+    result = await flow.async_step_user(
+        {
+            CONF_NAME: NAME,
+            CONF_HOST: HOST,
+            CONF_USERNAME: USERNAME,
+            CONF_PASSWORD: PASSWORD,
+            CONF_PORT: PORT,
+        }
+    )
+    assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result["errors"] == {
+        CONF_USERNAME: "wrong_credentials",
+        CONF_PASSWORD: "wrong_credentials",
+    }
+
+
+async def test_error_on_connection_failure(hass, conn_error):
+    """Test when connection to host fails."""
+    flow = init_config_flow(hass)
+
+    result = await flow.async_step_user(
+        {
+            CONF_NAME: NAME,
+            CONF_HOST: HOST,
+            CONF_USERNAME: USERNAME,
+            CONF_PASSWORD: PASSWORD,
+            CONF_PORT: PORT,
+        }
+    )
+    assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result["errors"] == {"base": "cannot_connect"}
+
+
+async def test_error_on_unknwon_error(hass, unknown_error):
+    """Test when connection to host fails."""
+    flow = init_config_flow(hass)
+
+    result = await flow.async_step_user(
+        {
+            CONF_NAME: NAME,
+            CONF_HOST: HOST,
+            CONF_USERNAME: USERNAME,
+            CONF_PASSWORD: PASSWORD,
+            CONF_PORT: PORT,
+        }
+    )
+    assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
+    assert result["errors"] == {"base": "cannot_connect"}