diff --git a/homeassistant/components/rfxtrx/__init__.py b/homeassistant/components/rfxtrx/__init__.py
index fb57359829c..6c631cad029 100644
--- a/homeassistant/components/rfxtrx/__init__.py
+++ b/homeassistant/components/rfxtrx/__init__.py
@@ -378,6 +378,7 @@ class RfxtrxDevice(Entity):
         self._state = datas[ATTR_STATE]
         self._should_fire_event = datas[ATTR_FIRE_EVENT]
         self._brightness = 0
+        self._unique_id = f"{slugify(self._event.device.type_string.lower())}_{slugify(self._event.device.id_string.lower())}"
         self.added_to_hass = False
 
     async def async_added_to_hass(self):
@@ -409,6 +410,11 @@ class RfxtrxDevice(Entity):
         """Return true if unable to access real state of entity."""
         return True
 
+    @property
+    def unique_id(self):
+        """Return unique identifier of remote device."""
+        return self._unique_id
+
     def turn_off(self, **kwargs):
         """Turn the device off."""
         self._send_command("turn_off")
diff --git a/homeassistant/components/rfxtrx/binary_sensor.py b/homeassistant/components/rfxtrx/binary_sensor.py
index 5e610128ea6..6426f824320 100644
--- a/homeassistant/components/rfxtrx/binary_sensor.py
+++ b/homeassistant/components/rfxtrx/binary_sensor.py
@@ -197,6 +197,7 @@ class RfxtrxBinarySensor(BinarySensorEntity):
         self._data_bits = data_bits
         self._cmd_on = cmd_on
         self._cmd_off = cmd_off
+        self._unique_id = f"{slugify(self.event.device.type_string.lower())}_{slugify(self.event.device.id_string.lower())}"
 
         if data_bits is not None:
             self._masked_id = get_pt2262_deviceid(
@@ -255,6 +256,11 @@ class RfxtrxBinarySensor(BinarySensorEntity):
         """Return true if the sensor state is True."""
         return self._state
 
+    @property
+    def unique_id(self):
+        """Return unique identifier of remote device."""
+        return self._unique_id
+
     def apply_cmd(self, cmd):
         """Apply a command for updating the state."""
         if cmd == self.cmd_on:
diff --git a/homeassistant/components/rfxtrx/sensor.py b/homeassistant/components/rfxtrx/sensor.py
index 759268140fc..1b053156fd8 100644
--- a/homeassistant/components/rfxtrx/sensor.py
+++ b/homeassistant/components/rfxtrx/sensor.py
@@ -127,6 +127,7 @@ class RfxtrxSensor(Entity):
         self.should_fire_event = should_fire_event
         self.data_type = data_type
         self._unit_of_measurement = DATA_TYPES.get(data_type, "")
+        self._unique_id = f"{slugify(self.event.device.type_string.lower())}_{slugify(self.event.device.id_string.lower())}_{slugify(self.data_type)}"
 
     def __str__(self):
         """Return the name of the sensor."""
@@ -155,3 +156,8 @@ class RfxtrxSensor(Entity):
     def unit_of_measurement(self):
         """Return the unit this state is expressed in."""
         return self._unit_of_measurement
+
+    @property
+    def unique_id(self):
+        """Return unique identifier of remote device."""
+        return self._unique_id