diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index da9ac22..07cca4a 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -8,6 +8,11 @@ on:
 jobs:
   pre-commit:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - "3.13"
+          - "3.14"
 
     steps:
       - uses: actions/checkout@v6
@@ -15,7 +20,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
-          python-version: "3.13"
+          python-version: ${{ matrix.python-version }}
 
       - name: Install uv
         uses: astral-sh/setup-uv@v7
diff --git a/custom_components/vantage/binary_sensor.py b/custom_components/vantage/binary_sensor.py
index cbe9124..3e33e3a 100644
--- a/custom_components/vantage/binary_sensor.py
+++ b/custom_components/vantage/binary_sensor.py
@@ -3,9 +3,14 @@
 from typing import override
 
 from aiovantage.controllers import Controller
-from aiovantage.objects import DryContact
+from aiovantage.events import Connected, Disconnected, Reconnected
+from aiovantage.objects import DryContact, Master
 
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    BinarySensorDeviceClass,
+    BinarySensorEntity,
+)
+from homeassistant.const import EntityCategory
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -26,6 +31,11 @@ async def async_setup_entry(
         entry, async_add_entities, VantageBinarySensorEntity, vantage.dry_contacts
     )
 
+    # Add a connectivity binary sensor for each controller
+    add_entities_from_controller(
+        entry, async_add_entities, VantageControllerConnectivityEntity, vantage.masters
+    )
+
 
 class VantageBinarySensorEntity(VantageEntity[DryContact], BinarySensorEntity):
     """Binary sensor entity provided by a Vantage DryContact object."""
@@ -47,3 +57,51 @@ def __init__(
     @override
     def is_on(self) -> bool | None:
         return self.obj.is_down
+
+
+class VantageControllerConnectivityEntity(VantageEntity[Master], BinarySensorEntity):
+    """Binary sensor reflecting the live connection to a Vantage controller.
+
+    Unlike the per-object entities, this sensor stays available and reports `off`
+    while the controller is unreachable, giving a single reliable signal that does
+    not depend on individual object polls failing one by one.
+    """
+
+    _attr_device_class = BinarySensorDeviceClass.CONNECTIVITY
+    _attr_entity_category = EntityCategory.DIAGNOSTIC
+
+    # Override the base "vantage" translation key so the name comes from the
+    # connectivity device class ("Connectivity").
+    _attr_translation_key = None
+
+    # Setup only completes after a successful initialize(), so the event stream is
+    # connected at this point. Connection events keep this in sync afterwards.
+    _attr_is_on = True
+
+    @property
+    @override
+    def unique_id(self) -> str:
+        return f"{self.obj.vid}:connectivity"
+
+    @property
+    @override
+    def is_on(self) -> bool | None:
+        return self._attr_is_on
+
+    @override
+    async def async_added_to_hass(self) -> None:
+        await super().async_added_to_hass()
+
+        event_stream = self.client.event_stream
+
+        def set_connected(_event: Connected | Reconnected) -> None:
+            self._attr_is_on = True
+            self.async_write_ha_state()
+
+        def set_disconnected(_event: Disconnected) -> None:
+            self._attr_is_on = False
+            self.async_write_ha_state()
+
+        self.async_on_remove(event_stream.subscribe(Connected, set_connected))
+        self.async_on_remove(event_stream.subscribe(Reconnected, set_connected))
+        self.async_on_remove(event_stream.subscribe(Disconnected, set_disconnected))