diff --git a/homeassistant/components/rfxtrx/__init__.py b/homeassistant/components/rfxtrx/__init__.py
index 9eaa705bf3e..be56f4b789c 100644
--- a/homeassistant/components/rfxtrx/__init__.py
+++ b/homeassistant/components/rfxtrx/__init__.py
@@ -12,6 +12,7 @@ import voluptuous as vol
 from homeassistant import config_entries
 from homeassistant.components.binary_sensor import DEVICE_CLASSES_SCHEMA
 from homeassistant.const import (
+    ATTR_DEVICE_ID,
     CONF_COMMAND_OFF,
     CONF_COMMAND_ON,
     CONF_DEVICE,
@@ -37,6 +38,7 @@ from homeassistant.const import (
 )
 from homeassistant.core import callback
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.device_registry import DeviceRegistry
 from homeassistant.helpers.restore_state import RestoreEntity
 
 from .const import (
@@ -275,6 +277,10 @@ async def async_setup_internal(hass, entry: config_entries.ConfigEntry):
     # Setup some per device config
     devices = _get_device_lookup(config[CONF_DEVICES])
 
+    device_registry: DeviceRegistry = (
+        await hass.helpers.device_registry.async_get_registry()
+    )
+
     # Declare the Handle event
     @callback
     def async_handle_receive(event):
@@ -297,9 +303,18 @@ async def async_setup_internal(hass, entry: config_entries.ConfigEntry):
         data_bits = get_device_data_bits(event.device, devices)
         device_id = get_device_id(event.device, data_bits=data_bits)
 
-        # Register new devices
-        if config[CONF_AUTOMATIC_ADD] and device_id not in devices:
-            _add_device(event, device_id)
+        if device_id not in devices:
+            if config[CONF_AUTOMATIC_ADD]:
+                _add_device(event, device_id)
+            else:
+                return
+
+        device_entry = device_registry.async_get_device(
+            identifiers={(DOMAIN, *device_id)},
+            connections=set(),
+        )
+        if device_entry:
+            event_data[ATTR_DEVICE_ID] = device_entry.id
 
         # Callback to HA registered components.
         hass.helpers.dispatcher.async_dispatcher_send(SIGNAL_EVENT, event, device_id)
diff --git a/tests/components/rfxtrx/test_init.py b/tests/components/rfxtrx/test_init.py
index c2e1870638f..1480aa300d0 100644
--- a/tests/components/rfxtrx/test_init.py
+++ b/tests/components/rfxtrx/test_init.py
@@ -5,6 +5,10 @@ from unittest.mock import call
 from homeassistant.components.rfxtrx import DOMAIN
 from homeassistant.components.rfxtrx.const import EVENT_RFXTRX_EVENT
 from homeassistant.core import callback
+from homeassistant.helpers.device_registry import (
+    DeviceRegistry,
+    async_get_registry as async_get_device_registry,
+)
 from homeassistant.setup import async_setup_component
 
 from tests.common import MockConfigEntry
@@ -75,6 +79,8 @@ async def test_fire_event(hass, rfxtrx):
     await hass.async_block_till_done()
     await hass.async_start()
 
+    device_registry: DeviceRegistry = await async_get_device_registry(hass)
+
     calls = []
 
     @callback
@@ -88,6 +94,16 @@ async def test_fire_event(hass, rfxtrx):
     await rfxtrx.signal("0b1100cd0213c7f210010f51")
     await rfxtrx.signal("0716000100900970")
 
+    device_id_1 = device_registry.async_get_device(
+        identifiers={("rfxtrx", "11", "0", "213c7f2:16")}, connections=set()
+    )
+    assert device_id_1
+
+    device_id_2 = device_registry.async_get_device(
+        identifiers={("rfxtrx", "16", "0", "00:90")}, connections=set()
+    )
+    assert device_id_2
+
     assert calls == [
         {
             "packet_type": 17,
@@ -96,6 +112,7 @@ async def test_fire_event(hass, rfxtrx):
             "id_string": "213c7f2:16",
             "data": "0b1100cd0213c7f210010f51",
             "values": {"Command": "On", "Rssi numeric": 5},
+            "device_id": device_id_1.id,
         },
         {
             "packet_type": 22,
@@ -104,6 +121,7 @@ async def test_fire_event(hass, rfxtrx):
             "id_string": "00:90",
             "data": "0716000100900970",
             "values": {"Command": "Chime", "Rssi numeric": 7, "Sound": 9},
+            "device_id": device_id_2.id,
         },
     ]