diff --git a/README.md b/README.md
index 85fc6982..42ecaaa8 100644
--- a/README.md
+++ b/README.md
@@ -242,7 +242,7 @@ The following devices have been tested and confirmed as working. If your device
 - **Bulbs**: L510B, L510E, L530E
 - **Light Strips**: L900-10, L900-5, L920-5, L930-5
 - **Hubs**: H100
-- **Hub-Connected Devices<sup>\*\*\*</sup>**: T300, T310, T315
+- **Hub-Connected Devices<sup>\*\*\*</sup>**: T110, T300, T310, T315
 
 <!--SUPPORTED_END-->
 <sup>\*</sup>&nbsp;&nbsp; Model requires authentication<br>
diff --git a/SUPPORTED.md b/SUPPORTED.md
index 451efe68..f3c505e4 100644
--- a/SUPPORTED.md
+++ b/SUPPORTED.md
@@ -214,6 +214,8 @@ All Tapo devices require authentication.<br>Hub-Connected Devices may work acros
 
 ### Hub-Connected Devices
 
+- **T110**
+  - Hardware: 1.0 (EU) / Firmware: 1.8.0
 - **T300**
   - Hardware: 1.0 (EU) / Firmware: 1.7.0
 - **T310**
diff --git a/kasa/smart/modules/__init__.py b/kasa/smart/modules/__init__.py
index 64722079..b0956b80 100644
--- a/kasa/smart/modules/__init__.py
+++ b/kasa/smart/modules/__init__.py
@@ -8,6 +8,7 @@ from .childdevicemodule import ChildDeviceModule
 from .cloudmodule import CloudModule
 from .colormodule import ColorModule
 from .colortemp import ColorTemperatureModule
+from .contact import ContactSensor
 from .devicemodule import DeviceModule
 from .energymodule import EnergyModule
 from .fanmodule import FanModule
@@ -45,5 +46,6 @@ __all__ = [
     "ColorTemperatureModule",
     "ColorModule",
     "WaterleakSensor",
+    "ContactSensor",
     "FrostProtectionModule",
 ]
diff --git a/kasa/smart/modules/contact.py b/kasa/smart/modules/contact.py
new file mode 100644
index 00000000..7932a081
--- /dev/null
+++ b/kasa/smart/modules/contact.py
@@ -0,0 +1,42 @@
+"""Implementation of contact sensor module."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from ...feature import Feature
+from ..smartmodule import SmartModule
+
+if TYPE_CHECKING:
+    from ..smartdevice import SmartDevice
+
+
+class ContactSensor(SmartModule):
+    """Implementation of contact sensor module."""
+
+    REQUIRED_COMPONENT = None  # we depend on availability of key
+    REQUIRED_KEY_ON_PARENT = "open"
+
+    def __init__(self, device: SmartDevice, module: str):
+        super().__init__(device, module)
+        self._add_feature(
+            Feature(
+                device,
+                id="is_open",
+                name="Open",
+                container=self,
+                attribute_getter="is_open",
+                icon="mdi:door",
+                category=Feature.Category.Primary,
+                type=Feature.Type.BinarySensor,
+            )
+        )
+
+    def query(self) -> dict:
+        """Query to execute during the update cycle."""
+        return {}
+
+    @property
+    def is_open(self):
+        """Return True if the contact sensor is open."""
+        return self._device.sys_info["open"]
diff --git a/kasa/smart/smartchilddevice.py b/kasa/smart/smartchilddevice.py
index 7f747b84..d841d2d9 100644
--- a/kasa/smart/smartchilddevice.py
+++ b/kasa/smart/smartchilddevice.py
@@ -49,6 +49,7 @@ class SmartChildDevice(SmartDevice):
         """Return child device type."""
         child_device_map = {
             "plug.powerstrip.sub-plug": DeviceType.Plug,
+            "subg.trigger.contact-sensor": DeviceType.Sensor,
             "subg.trigger.temp-hmdt-sensor": DeviceType.Sensor,
             "subg.trigger.water-leak-sensor": DeviceType.Sensor,
             "kasa.switch.outlet.sub-fan": DeviceType.Fan,
diff --git a/kasa/smart/smartdevice.py b/kasa/smart/smartdevice.py
index 89813387..68b08902 100644
--- a/kasa/smart/smartdevice.py
+++ b/kasa/smart/smartdevice.py
@@ -210,7 +210,10 @@ class SmartDevice(Bulb, Fan, Device):
                 skip_parent_only_modules and mod in WALL_SWITCH_PARENT_ONLY_MODULES
             ) or mod.__name__ in child_modules_to_skip:
                 continue
-            if mod.REQUIRED_COMPONENT in self._components:
+            if (
+                mod.REQUIRED_COMPONENT in self._components
+                or self.sys_info.get(mod.REQUIRED_KEY_ON_PARENT) is not None
+            ):
                 _LOGGER.debug(
                     "Found required %s, adding %s to modules.",
                     mod.REQUIRED_COMPONENT,
diff --git a/kasa/smart/smartmodule.py b/kasa/smart/smartmodule.py
index 9169b752..e78f4393 100644
--- a/kasa/smart/smartmodule.py
+++ b/kasa/smart/smartmodule.py
@@ -18,8 +18,13 @@ class SmartModule(Module):
     """Base class for SMART modules."""
 
     NAME: str
-    REQUIRED_COMPONENT: str
+    #: Module is initialized, if the given component is available
+    REQUIRED_COMPONENT: str | None = None
+    #: Module is initialized, if the given key available in the main sysinfo
+    REQUIRED_KEY_ON_PARENT: str | None = None
+    #: Query to execute during the main update cycle
     QUERY_GETTER_NAME: str
+
     REGISTERED_MODULES: dict[str, type[SmartModule]] = {}
 
     def __init__(self, device: SmartDevice, module: str):
@@ -27,8 +32,6 @@ class SmartModule(Module):
         super().__init__(device, module)
 
     def __init_subclass__(cls, **kwargs):
-        assert cls.REQUIRED_COMPONENT is not None  # noqa: S101
-
         name = getattr(cls, "NAME", cls.__name__)
         _LOGGER.debug("Registering %s" % cls)
         cls.REGISTERED_MODULES[name] = cls
@@ -91,8 +94,13 @@ class SmartModule(Module):
 
     @property
     def supported_version(self) -> int:
-        """Return version supported by the device."""
-        return self._device._components[self.REQUIRED_COMPONENT]
+        """Return version supported by the device.
+
+        If the module has no required component, this will return -1.
+        """
+        if self.REQUIRED_COMPONENT is not None:
+            return self._device._components[self.REQUIRED_COMPONENT]
+        return -1
 
     async def _check_supported(self) -> bool:
         """Additional check to see if the module is supported by the device.
diff --git a/kasa/tests/device_fixtures.py b/kasa/tests/device_fixtures.py
index 92a86b6f..826465e5 100644
--- a/kasa/tests/device_fixtures.py
+++ b/kasa/tests/device_fixtures.py
@@ -109,7 +109,7 @@ DIMMERS = {
 }
 
 HUBS_SMART = {"H100", "KH100"}
-SENSORS_SMART = {"T310", "T315", "T300"}
+SENSORS_SMART = {"T310", "T315", "T300", "T110"}
 THERMOSTATS_SMART = {"KE100"}
 
 WITH_EMETER_IOT = {"HS110", "HS300", "KP115", "KP125", *BULBS_IOT}
diff --git a/kasa/tests/fixtures/smart/child/T110(EU)_1.0_1.8.0.json b/kasa/tests/fixtures/smart/child/T110(EU)_1.0_1.8.0.json
new file mode 100644
index 00000000..acf7ae88
--- /dev/null
+++ b/kasa/tests/fixtures/smart/child/T110(EU)_1.0_1.8.0.json
@@ -0,0 +1,526 @@
+{
+    "component_nego": {
+        "component_list": [
+            {
+                "id": "device",
+                "ver_code": 2
+            },
+            {
+                "id": "quick_setup",
+                "ver_code": 3
+            },
+            {
+                "id": "trigger_log",
+                "ver_code": 1
+            },
+            {
+                "id": "time",
+                "ver_code": 1
+            },
+            {
+                "id": "device_local_time",
+                "ver_code": 1
+            },
+            {
+                "id": "account",
+                "ver_code": 1
+            },
+            {
+                "id": "synchronize",
+                "ver_code": 1
+            },
+            {
+                "id": "cloud_connect",
+                "ver_code": 1
+            },
+            {
+                "id": "iot_cloud",
+                "ver_code": 1
+            },
+            {
+                "id": "firmware",
+                "ver_code": 1
+            },
+            {
+                "id": "localSmart",
+                "ver_code": 1
+            },
+            {
+                "id": "battery_detect",
+                "ver_code": 1
+            }
+        ]
+    },
+    "get_connect_cloud_state": {
+        "status": 0
+    },
+    "get_device_info": {
+        "at_low_battery": false,
+        "avatar": "sensor_t110",
+        "bind_count": 1,
+        "category": "subg.trigger.contact-sensor",
+        "device_id": "SCRUBBED_CHILD_DEVICE_ID_2",
+        "fw_ver": "1.8.0 Build 220728 Rel.160024",
+        "hw_id": "00000000000000000000000000000000",
+        "hw_ver": "1.0",
+        "jamming_rssi": -113,
+        "jamming_signal_level": 1,
+        "lastOnboardingTimestamp": 1714661626,
+        "mac": "E4FAC4000000",
+        "model": "T110",
+        "nickname": "I01BU0tFRF9OQU1FIw==",
+        "oem_id": "00000000000000000000000000000000",
+        "open": false,
+        "parent_device_id": "0000000000000000000000000000000000000000",
+        "region": "Europe/Berlin",
+        "report_interval": 16,
+        "rssi": -54,
+        "signal_level": 3,
+        "specs": "EU",
+        "status": "online",
+        "status_follow_edge": false,
+        "type": "SMART.TAPOSENSOR"
+    },
+    "get_fw_download_state": {
+        "cloud_cache_seconds": 1,
+        "download_progress": 30,
+        "reboot_time": 5,
+        "status": 4,
+        "upgrade_time": 5
+    },
+    "get_latest_fw": {
+        "fw_ver": "1.9.0 Build 230704 Rel.154531",
+        "hw_id": "00000000000000000000000000000000",
+        "need_to_upgrade": true,
+        "oem_id": "00000000000000000000000000000000",
+        "release_date": "2023-10-30",
+        "release_note": "Modifications and Bug Fixes:\n1. Reduced power consumption.\n2. Fixed some minor bugs.",
+        "type": 2
+    },
+    "get_temp_humidity_records": {
+        "local_time": 1714681046,
+        "past24h_humidity": [
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
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+            -1000,
+            -1000,
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+            -1000,
+            -1000,
+            -1000,
+            -1000
+        ],
+        "past24h_humidity_exception": [
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
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+        ],
+        "past24h_temp": [
+            -1000,
+            -1000,
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+            -1000,
+            -1000,
+            -1000,
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+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000
+        ],
+        "past24h_temp_exception": [
+            -1000,
+            -1000,
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+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000,
+            -1000
+        ],
+        "temp_unit": "celsius"
+    },
+    "get_trigger_logs": {
+        "logs": [
+            {
+                "event": "close",
+                "eventId": "8140289c-c66b-bdd6-63b9-542299442299",
+                "id": 4,
+                "timestamp": 1714661714
+            },
+            {
+                "event": "open",
+                "eventId": "fb4e1439-2f2c-a5e1-c35a-9e7c0d35a1e3",
+                "id": 3,
+                "timestamp": 1714661710
+            },
+            {
+                "event": "close",
+                "eventId": "ddee7733-1180-48ac-56a3-512018048ac5",
+                "id": 2,
+                "timestamp": 1714661657
+            },
+            {
+                "event": "open",
+                "eventId": "ab80951f-da38-49f9-21c5-bf025c7b606d",
+                "id": 1,
+                "timestamp": 1714661638
+            }
+        ],
+        "start_id": 4,
+        "sum": 4
+    }
+}
diff --git a/kasa/tests/smart/modules/test_contact.py b/kasa/tests/smart/modules/test_contact.py
new file mode 100644
index 00000000..fc337545
--- /dev/null
+++ b/kasa/tests/smart/modules/test_contact.py
@@ -0,0 +1,29 @@
+import pytest
+
+from kasa import SmartDevice
+from kasa.smart.modules import ContactSensor
+from kasa.tests.device_fixtures import parametrize
+
+contact = parametrize(
+    "is contact sensor", model_filter="T110", protocol_filter={"SMART.CHILD"}
+)
+
+
+@contact
+@pytest.mark.parametrize(
+    "feature, type",
+    [
+        ("is_open", bool),
+    ],
+)
+async def test_contact_features(dev: SmartDevice, feature, type):
+    """Test that features are registered and work as expected."""
+    contact = dev.get_module(ContactSensor)
+    assert contact is not None
+
+    prop = getattr(contact, feature)
+    assert isinstance(prop, type)
+
+    feat = contact._module_features[feature]
+    assert feat.value == prop
+    assert isinstance(feat.value, type)