diff --git a/src/demetriek/models.py b/src/demetriek/models.py
index 642f5b2f..eefa1e72 100644
--- a/src/demetriek/models.py
+++ b/src/demetriek/models.py
@@ -177,15 +177,18 @@ class Config(BaseConfig):
 class Wifi(DataClassORJSONMixin):
     """Object holding the Wi-Fi state of an LaMetric device."""
 
-    active: bool
     available: bool
     encryption: str | None = None
-    ip: IPv4Address
-    mac: str
     mode: WifiMode
-    netmask: str
     rssi: int | None = None
-    ssid: str
+
+    # A device that is (re)connecting to its Wi-Fi network leaves these out,
+    # or reports them as null. Seen on a real TIME, home-assistant/core#97575.
+    active: bool | None = None
+    ip: IPv4Address | None = None
+    mac: str | None = None
+    netmask: str | None = None
+    ssid: str | None = None
 
 
 @dataclass(kw_only=True)
diff --git a/tests/fixtures/device_wifi_connecting.json b/tests/fixtures/device_wifi_connecting.json
new file mode 100644
index 00000000..269c9fe8
--- /dev/null
+++ b/tests/fixtures/device_wifi_connecting.json
@@ -0,0 +1,67 @@
+{
+  "audio": {
+    "volume": 46,
+    "volume_limit": {
+      "max": 100,
+      "min": 0
+    },
+    "volume_range": {
+      "max": 100,
+      "min": 0
+    }
+  },
+  "bluetooth": {
+    "active": false,
+    "address": "AA:BB:CC:DD:EE:FF",
+    "available": true,
+    "discoverable": true,
+    "low_energy": {
+      "active": true,
+      "advertising": true,
+      "connectable": true
+    },
+    "name": "LM1234",
+    "pairable": true
+  },
+  "display": {
+    "brightness": 100,
+    "brightness_limit": {
+      "max": 100,
+      "min": 2
+    },
+    "brightness_mode": "auto",
+    "brightness_range": {
+      "max": 100,
+      "min": 0
+    },
+    "height": 8,
+    "screensaver": {
+      "enabled": true,
+      "modes": {
+        "time_based": {
+          "enabled": false
+        },
+        "when_dark": {
+          "enabled": true
+        }
+      },
+      "widget": "08b8eac21074f8f7e5a29f2855ba8060"
+    },
+    "type": "mixed",
+    "width": 37
+  },
+  "id": "12345",
+  "mode": "manual",
+  "model": "LM 37X8",
+  "name": "Living room",
+  "os_version": "2.3.9",
+  "serial_number": "SA000000000000W00BS9",
+  "wifi": {
+    "address": null,
+    "available": true,
+    "encryption": "WPA",
+    "essid": null,
+    "mode": "dhcp",
+    "strength": 18
+  }
+}
diff --git a/tests/test_device.py b/tests/test_device.py
index ca22ec8b..47b03579 100644
--- a/tests/test_device.py
+++ b/tests/test_device.py
@@ -136,6 +136,33 @@ async def test_get_device_wifi_not_an_object(
         await device.device()
 
 
+async def test_get_device_wifi_connecting(
+    responses: aioresponses, device: LaMetricDevice
+) -> None:
+    """Test a device still connecting to its Wi-Fi does not fail the update.
+
+    A real TIME answered like this in home-assistant/core#97575. Only the
+    Wi-Fi details are missing, the rest of the device is still there.
+    """
+    responses.get(
+        f"{DEVICE_URL}/api/v2/device",
+        status=200,
+        body=load_fixture("device_wifi_connecting.json"),
+    )
+
+    result = await device.device()
+
+    assert result.wifi.available is True
+    assert result.wifi.rssi == 18
+    assert result.wifi.active is None
+    assert result.wifi.ip is None
+    assert result.wifi.mac is None
+    assert result.wifi.netmask is None
+    assert result.wifi.ssid is None
+    assert result.display.brightness is not None
+    assert result.audio is not None
+
+
 async def test_get_device_update(
     responses: aioresponses, device: LaMetricDevice
 ) -> None: