diff --git a/homeassistant/components/xiaomi_aqara.py b/homeassistant/components/xiaomi_aqara.py
index 9b108b2b47f..e5942f97139 100644
--- a/homeassistant/components/xiaomi_aqara.py
+++ b/homeassistant/components/xiaomi_aqara.py
@@ -21,6 +21,7 @@ import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.event import async_track_point_in_utc_time
 from homeassistant.util.dt import utcnow
+from homeassistant.util import slugify
 
 REQUIREMENTS = ['PyXiaomiGateway==0.8.1']
 
@@ -203,12 +204,13 @@ def setup(hass, config):
 class XiaomiDevice(Entity):
     """Representation a base Xiaomi device."""
 
-    def __init__(self, device, name, xiaomi_hub):
+    def __init__(self, device, device_type, xiaomi_hub):
         """Initialize the Xiaomi device."""
         self._state = None
         self._is_available = True
         self._sid = device['sid']
-        self._name = '{}_{}'.format(name, self._sid)
+        self._name = '{}_{}'.format(device_type, self._sid)
+        self._type = device_type
         self._write_to_hub = xiaomi_hub.write_to_hub
         self._get_from_hub = xiaomi_hub.get_from_hub
         self._device_state_attributes = {}
@@ -217,6 +219,14 @@ class XiaomiDevice(Entity):
         self.parse_data(device['data'], device['raw_data'])
         self.parse_voltage(device['data'])
 
+        if hasattr(self, '_data_key') \
+                and self._data_key:  # pylint: disable=no-member
+            self._unique_id = slugify("{}-{}".format(
+                self._data_key,  # pylint: disable=no-member
+                self._sid))
+        else:
+            self._unique_id = slugify("{}-{}".format(self._type, self._sid))
+
     def _add_push_data_job(self, *args):
         self.hass.add_job(self.push_data, *args)
 
@@ -230,6 +240,11 @@ class XiaomiDevice(Entity):
         """Return the name of the device."""
         return self._name
 
+    @property
+    def unique_id(self) -> str:
+        """Return an unique ID."""
+        return self._unique_id
+
     @property
     def available(self):
         """Return True if entity is available."""