diff --git a/custom_components/bermuda/coordinator.py b/custom_components/bermuda/coordinator.py
index 1a774ab..eb3f8f7 100644
--- a/custom_components/bermuda/coordinator.py
+++ b/custom_components/bermuda/coordinator.py
@@ -153,7 +153,7 @@ def __init__(
 
         self._manager: HomeAssistantBluetoothManager = _get_manager(hass)  # instance of the bluetooth manager
         self._hascanners: set[BaseHaScanner]  # Links to the backend scanners
-        self._hascanner_timestamps: dict[str, dict[str, float]] = {} # scanner_address, device_address, stamp
+        self._hascanner_timestamps: dict[str, dict[str, float]] = {}  # scanner_address, device_address, stamp
 
         self._entity_registry = er.async_get(self.hass)
         self._device_registry = dr.async_get(self.hass)
@@ -1121,7 +1121,7 @@ def _refresh_scanners(self, scanners: list[BluetoothScannerDevice] | None = None
             scanner_devreg = self._device_registry.async_get_device(
                 connections={
                     ("mac", scanner_address),  # Matches ESPHome proxies, Shellys etc
-                    ("bluetooth", scanner_address),  # Matches local USB Bluetooth (hci0..)
+                    ("bluetooth", scanner_address.upper()),  # Matches local USB Bluetooth (hci0..)
                 }
             )
             if scanner_devreg is None:
diff --git a/custom_components/bermuda/entity.py b/custom_components/bermuda/entity.py
index 42558b6..80b2918 100644
--- a/custom_components/bermuda/entity.py
+++ b/custom_components/bermuda/entity.py
@@ -184,7 +184,7 @@ def _handle_coordinator_update(self) -> None:
         """
         self.async_write_ha_state()
 
-    def _cached_ratelimit(self, statevalue: Any, interval:int|None=None):
+    def _cached_ratelimit(self, statevalue: Any, interval: int | None = None):
         """A simple way to rate-limit sensor updates."""
         if interval is not None:
             self._cache_ratelimit_interval = interval