diff --git a/homeassistant/components/rfxtrx/__init__.py b/homeassistant/components/rfxtrx/__init__.py
index 5f665a242ad..f817668156f 100644
--- a/homeassistant/components/rfxtrx/__init__.py
+++ b/homeassistant/components/rfxtrx/__init__.py
@@ -328,7 +328,7 @@ class RfxtrxDevice(Entity):
         self._event = event
         self._state = datas[ATTR_STATE]
         self._should_fire_event = datas[ATTR_FIRE_EVENT]
-        self._unique_id = f"{slugify(self._event.device.type_string.lower())}_{slugify(self._event.device.id_string.lower())}"
+        self._unique_id = f"{event.device.packettype:x}_{event.device.subtype:x}_{event.device.id_string}"
 
     @property
     def should_poll(self):
diff --git a/homeassistant/components/rfxtrx/binary_sensor.py b/homeassistant/components/rfxtrx/binary_sensor.py
index 1f756fe4487..13ba00af0bf 100644
--- a/homeassistant/components/rfxtrx/binary_sensor.py
+++ b/homeassistant/components/rfxtrx/binary_sensor.py
@@ -162,14 +162,15 @@ 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(
                 event.device.id_string.lower(), data_bits
             )
+            self._unique_id = f"{event.device.packettype:x}_{event.device.subtype:x}_{self._masked_id}"
         else:
             self._masked_id = None
+            self._unique_id = f"{event.device.packettype:x}_{event.device.subtype:x}_{event.device.id_string}"
 
     async def async_added_to_hass(self):
         """Restore RFXtrx switch device state (ON/OFF)."""
diff --git a/homeassistant/components/rfxtrx/sensor.py b/homeassistant/components/rfxtrx/sensor.py
index 1ba22ab5435..76b033aebee 100644
--- a/homeassistant/components/rfxtrx/sensor.py
+++ b/homeassistant/components/rfxtrx/sensor.py
@@ -119,7 +119,9 @@ 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(device.type_string.lower())}_{slugify(device.id_string.lower())}_{slugify(data_type)}"
+        self._unique_id = (
+            f"{device.packettype:x}_{device.subtype:x}_{device.id_string}_{data_type}"
+        )
 
     async def async_added_to_hass(self):
         """Restore RFXtrx switch device state (ON/OFF)."""