diff --git a/custom_components/mikrotik_router/__init__.py b/custom_components/mikrotik_router/__init__.py
index 00fd103..0cc96f1 100644
--- a/custom_components/mikrotik_router/__init__.py
+++ b/custom_components/mikrotik_router/__init__.py
@@ -52,9 +52,9 @@ async def async_setup_entry(hass, config_entry):
     
     hass.data[DOMAIN][DATA_CLIENT][config_entry.entry_id] = mikrotik_controller
     
-    # hass.async_create_task(
-    #   hass.config_entries.async_forward_entry_setup(config_entry, "sensor")
-    # )
+    hass.async_create_task(
+        hass.config_entries.async_forward_entry_setup(config_entry, "sensor")
+    )
     
     hass.async_create_task(
         hass.config_entries.async_forward_entry_setup(config_entry, "device_tracker")
diff --git a/custom_components/mikrotik_router/mikrotik_controller.py b/custom_components/mikrotik_router/mikrotik_controller.py
index 7abeddd..eec78e2 100644
--- a/custom_components/mikrotik_router/mikrotik_controller.py
+++ b/custom_components/mikrotik_router/mikrotik_controller.py
@@ -104,6 +104,7 @@ class MikrotikControllerData():
         
         self.get_interfaces()
         self.get_arp()
+        self.get_system_resource()
         
         async_dispatcher_send(self.hass, self.signal_update)
         return
@@ -280,5 +281,16 @@ class MikrotikControllerData():
             self.data['resource']['platform'] = entry['platform'] if 'platform' in entry else "unknown"
             self.data['resource']['board-name'] = entry['board-name'] if 'board-name' in entry else "unknown"
             self.data['resource']['version'] = entry['version'] if 'version' in entry else "unknown"
+            self.data['resource']['uptime'] = entry['uptime'] if 'uptime' in entry else "unknown"
+            self.data['resource']['cpu-load'] = entry['cpu-load'] if 'cpu-load' in entry else "unknown"
+            if 'free-memory' in entry and 'total-memory' in entry:
+                self.data['resource']['memory-usage'] = round(((entry['total-memory'] - entry['free-memory']) / entry['total-memory']) * 100)
+            else:
+                self.data['resource']['memory-usage'] = "unknown"
+            
+            if 'free-hdd-space' in entry and 'total-hdd-space' in entry:
+                self.data['resource']['hdd-usage'] = round(((entry['total-hdd-space'] - entry['free-hdd-space']) / entry['total-hdd-space']) * 100)
+            else:
+                self.data['resource']['hdd-usage'] = "unknown"
         
         return
diff --git a/custom_components/mikrotik_router/sensor.py b/custom_components/mikrotik_router/sensor.py
new file mode 100644
index 0000000..b1d6221
--- /dev/null
+++ b/custom_components/mikrotik_router/sensor.py
@@ -0,0 +1,190 @@
+"""Support for the Mikrotik Router sensor service."""
+
+import logging
+from homeassistant.core import callback
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.entity import Entity
+from homeassistant.const import (
+    CONF_NAME,
+    ATTR_ATTRIBUTION,
+    ATTR_DEVICE_CLASS,
+)
+
+from .const import (
+    DOMAIN,
+    DATA_CLIENT,
+    ATTRIBUTION,
+)
+
+_LOGGER = logging.getLogger(__name__)
+
+ATTR_ICON = "icon"
+ATTR_LABEL = "label"
+ATTR_UNIT = "unit"
+
+SENSOR_TYPES = {
+    'system_cpu-load': {
+        ATTR_DEVICE_CLASS: None,
+        ATTR_ICON: "mdi:speedometer",
+        ATTR_LABEL: 'CPU load',
+        ATTR_UNIT: "%",
+        'group': "System",
+        'data_path': "resource",
+        'data_attr': "cpu-load",
+    },
+    'system_memory-usage': {
+        ATTR_DEVICE_CLASS: None,
+        ATTR_ICON: "mdi:memory",
+        ATTR_LABEL: 'Memory usage',
+        ATTR_UNIT: "%",
+        'group': "System",
+        'data_path': "resource",
+        'data_attr': "memory-usage",
+    },
+    'system_hdd-usage': {
+        ATTR_DEVICE_CLASS: None,
+        ATTR_ICON: "mdi:harddisk",
+        ATTR_LABEL: 'HDD usage',
+        ATTR_UNIT: "%",
+        'group': "System",
+        'data_path': "resource",
+        'data_attr': "hdd-usage",
+    },
+}
+
+
+# ---------------------------
+#   async_setup_entry
+# ---------------------------
+async def async_setup_entry(hass, config_entry, async_add_entities):
+    """Set up device tracker for Mikrotik Router component."""
+    name = config_entry.data[CONF_NAME]
+    mikrotik_controller = hass.data[DOMAIN][DATA_CLIENT][config_entry.entry_id]
+    sensors = {}
+    
+    @callback
+    def update_controller():
+        """Update the values of the controller."""
+        update_items(name, mikrotik_controller, async_add_entities, sensors)
+    
+    mikrotik_controller.listeners.append(
+        async_dispatcher_connect(hass, mikrotik_controller.signal_update, update_controller)
+    )
+    
+    update_controller()
+    return
+
+
+# ---------------------------
+#   update_items
+# ---------------------------
+@callback
+def update_items(name, mikrotik_controller, async_add_entities, sensors):
+    """Update sensor state from the controller."""
+    new_sensors = []
+    
+    for sensor in SENSOR_TYPES:
+        item_id = name + "-" + sensor
+        if item_id in sensors:
+            if sensors[item_id].enabled:
+                sensors[item_id].async_schedule_update_ha_state()
+            continue
+        
+        sensors[item_id] = MikrotikControllerSensor(mikrotik_controller=mikrotik_controller, name=name, kind=sensor)
+        new_sensors.append(sensors[item_id])
+    
+    if new_sensors:
+        async_add_entities(new_sensors, True)
+    
+    return
+    
+
+# ---------------------------
+#   MikrotikControllerSensor
+# ---------------------------
+class MikrotikControllerSensor(Entity):
+    """Define an Mikrotik Controller sensor."""
+    
+    def __init__(self, mikrotik_controller, name, kind, uid=''):
+        """Initialize."""
+        self.mikrotik_controller = mikrotik_controller
+        self.data = mikrotik_controller.data
+        self._name = name
+        self.kind = kind
+        self.uid = uid
+        
+        self._device_class = None
+        self._state = None
+        self._icon = None
+        self._unit_of_measurement = None
+        self._attrs = {ATTR_ATTRIBUTION: ATTRIBUTION}
+        
+    @property
+    def name(self):
+        """Return the name."""
+        if self.uid:
+            return f"{self._name} {self.uid} {SENSOR_TYPES[self.kind][ATTR_LABEL]}"
+        return f"{self._name} {SENSOR_TYPES[self.kind][ATTR_LABEL]}"
+
+    @property
+    def state(self):
+        """Return the state."""
+        val = "unknown"
+        if SENSOR_TYPES[self.kind]['data_path'] in self.mikrotik_controller.data and SENSOR_TYPES[self.kind]['data_attr'] in self.mikrotik_controller.data[SENSOR_TYPES[self.kind]['data_path']]:
+            val = self.mikrotik_controller.data[SENSOR_TYPES[self.kind]['data_path']][SENSOR_TYPES[self.kind]['data_attr']]
+        
+        return val
+
+    @property
+    def device_state_attributes(self):
+        """Return the state attributes."""
+        return self._attrs
+
+    @property
+    def icon(self):
+        """Return the icon."""
+        self._icon = SENSOR_TYPES[self.kind][ATTR_ICON]
+        return self._icon
+
+    @property
+    def device_class(self):
+        """Return the device_class."""
+        return SENSOR_TYPES[self.kind][ATTR_DEVICE_CLASS]
+
+    @property
+    def unique_id(self):
+        """Return a unique_id for this entity."""
+        if self.uid:
+            return f"{self._name.lower()}-{self.kind.lower()}-{self.uid.lower()}"
+        return f"{self._name.lower()}-{self.kind.lower()}"
+
+    @property
+    def unit_of_measurement(self):
+        """Return the unit the value is expressed in."""
+        return SENSOR_TYPES[self.kind][ATTR_UNIT]
+
+    @property
+    def available(self):
+        """Return True if entity is available."""
+        return bool(self.mikrotik_controller.data)
+    
+    @property
+    def device_info(self):
+        """Return a port description for device registry."""
+        info = {
+            "identifiers": {(DOMAIN, "serial-number", self.data['routerboard']['serial-number'])},
+            "manufacturer": self.mikrotik_controller.data['resource']['platform'],
+            "model": SENSOR_TYPES[self.kind]['group'],
+            "name": SENSOR_TYPES[self.kind]['group'],
+        }
+        return info
+
+    async def async_update(self):
+        """Synchronize state with controller."""
+        # await self.mikrotik_controller.async_update()
+        return
+    
+    async def async_added_to_hass(self):
+        """Port entity created."""
+        _LOGGER.debug("New sensor %s (%s)", self._name, self.kind)
+        return