diff --git a/homeassistant/components/wolflink/__init__.py b/homeassistant/components/wolflink/__init__.py
index 34df0176e29..73f49a2ad09 100644
--- a/homeassistant/components/wolflink/__init__.py
+++ b/homeassistant/components/wolflink/__init__.py
@@ -51,7 +51,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
             nonlocal refetch_parameters
             nonlocal parameters
             await wolf_client.update_session()
-            if not wolf_client.fetch_system_state_list(device_id, gateway_id):
+            if not await wolf_client.fetch_system_state_list(device_id, gateway_id):
                 refetch_parameters = True
                 raise UpdateFailed(
                     "Could not fetch values from server because device is Offline."
diff --git a/homeassistant/components/wolflink/const.py b/homeassistant/components/wolflink/const.py
index ac5bbad48dc..59329ee41dd 100644
--- a/homeassistant/components/wolflink/const.py
+++ b/homeassistant/components/wolflink/const.py
@@ -7,6 +7,7 @@ PARAMETERS = "parameters"
 DEVICE_ID = "device_id"
 DEVICE_GATEWAY = "device_gateway"
 DEVICE_NAME = "device_name"
+MANUFACTURER = "WOLF GmbH"
 
 STATES = {
     "Ein": "ein",
diff --git a/homeassistant/components/wolflink/sensor.py b/homeassistant/components/wolflink/sensor.py
index b4d60011658..2135239b3eb 100644
--- a/homeassistant/components/wolflink/sensor.py
+++ b/homeassistant/components/wolflink/sensor.py
@@ -15,10 +15,11 @@ from homeassistant.components.sensor import SensorDeviceClass, SensorEntity
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import UnitOfPressure, UnitOfTemperature, UnitOfTime
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
-from .const import COORDINATOR, DEVICE_ID, DOMAIN, PARAMETERS, STATES
+from .const import COORDINATOR, DEVICE_ID, DOMAIN, MANUFACTURER, PARAMETERS, STATES
 
 
 async def async_setup_entry(
@@ -60,6 +61,11 @@ class WolfLinkSensor(CoordinatorEntity, SensorEntity):
         self._attr_name = wolf_object.name
         self._attr_unique_id = f"{device_id}:{wolf_object.parameter_id}"
         self._state = None
+        self._attr_device_info = DeviceInfo(
+            identifiers={(DOMAIN, device_id)},
+            configuration_url="https://www.wolf-smartset.com/",
+            manufacturer=MANUFACTURER,
+        )
 
     @property
     def native_value(self):