diff --git a/src/controls/device.py b/src/controls/device.py
index d126692..fe85384 100644
--- a/src/controls/device.py
+++ b/src/controls/device.py
@@ -1,12 +1,16 @@
 from dataclasses import dataclass
 from typing import Optional, Collection, Any
-from abc import abstractmethod
-
-class DeviceLifecycleState:
-    pass  # TODO(Homework #3)
+from abc import abstractmethod, ABC
+import enum
 
 
-class DevaceError(Exception):
+class DeviceLifecycleState(enum.Enum):
+    INIT  = "INIT"
+    OPEN  = "OPEN"
+    CLOSE = "CLOSE"
+
+
+class DeviceError(Exception):
     pass
 
 
@@ -18,6 +22,12 @@ class NonWritableTrait(Exception):
     pass
 
 
+class NoSuchTrait(Exception):
+    pass
+
+class NoSuchAction(Exception):
+    pass
+
 @dataclass
 class TraitDescriptor:
     name: str
@@ -33,8 +43,7 @@ class ActionDescriptor:
     info: Optional[str] = None
 
 
-class Device:
-    # TODO(Homework #3)
+class Device(ABC):
     _state = DeviceLifecycleState.INIT
 
     @property
@@ -44,9 +53,14 @@ class Device:
     def close(self):
         self._state = DeviceLifecycleState.CLOSE
 
+    
+    @property
+    @abstractmethod
     def trait_descriptors(self) -> Collection[TraitDescriptor]:
         pass
 
+    @property
+    @abstractmethod
     def action_descriptors(self) -> Collection[ActionDescriptor]:
         pass
 
diff --git a/src/equipment/turtle_device.py b/src/equipment/turtle_device.py
index 3ba251f..f433dd8 100644
--- a/src/equipment/turtle_device.py
+++ b/src/equipment/turtle_device.py
@@ -1,8 +1,85 @@
 from turtle import Turtle
-from controls.device import SynchronyDevice
+from controls.device import (
+    SynchronyDevice,
+    TraitDescriptor,
+    ActionDescriptor,
+    NoSuchTrait,
+    NoSuchAction,
+)
+from typing import Collection, Optional, Any
+import inspect
+
 
 class TurtleDevice(SynchronyDevice):
-    pass  # TODO(Homework #3)
+    def __init__(self) -> None:
+        super().__init__()
+        self.open()
 
+    def open(self):
+        self.turtle = Turtle()
 
+    def close(self):
+        del self.turtle
 
+    def execute(self, action_name: str, *args, **kwargs):
+        pass
+
+    def read(self, trait_name: str) -> Any:
+        traits = self.trait_descriptors
+        for trait in traits:
+            if trait.name == trait_name:
+                return self.turtle.__getattribute__(trait_name)
+        raise NoSuchTrait
+
+    def write(self, trait_name: str, value: Any) -> bool:
+        traits = self.trait_descriptors
+        for trait in traits:
+            if trait.name == trait_name:
+                attribute_type = type(self.turtle.__getattribute__(trait_name))
+                assert (
+                    type(value) == attribute_type
+                ), f"Wrong value type. Type should be {attribute_type}, but you pass {type(value)}"
+                self.turtle.__setattr__(trait_name, value)
+                return True
+        raise NoSuchTrait
+
+    def invalidate(self, trait_name: str):
+        pass
+
+    def __getitem__(self, trait_name: str) -> Optional[Any]:
+        pass
+
+    @property
+    def trait_descriptors(self) -> Collection[TraitDescriptor]:
+        return [
+            TraitDescriptor(name=attr, info=getattr(self.turtle, attr).__doc__)
+            for attr in dir(self.turtle)
+            if attr[0] != "_"
+            and attr[-1] != "_"
+            and not callable(getattr(self.turtle, attr))
+        ]
+
+    @property
+    def action_descriptors(self) -> Collection[ActionDescriptor]:
+        methods = [
+            attr
+            for attr in dir(self.turtle)
+            if attr[0] != "_"
+            and attr[-1] != "_"
+            and callable(getattr(self.turtle, attr))
+        ]
+
+        result = []
+        for method_name in methods:
+            method = getattr(self.turtle, method_name)
+            args = inspect.signature(method).parameters
+            arg_types = {}
+            for arg_name, arg in args.items():
+                arg_types[arg_name] = arg.annotation
+            result.append(
+                ActionDescriptor(
+                    name=method_name, info=method.__doc__, arguments=arg_types
+                )
+            )
+
+        return result
diff --git a/src/tests/controls/test_device.py b/src/tests/controls/test_device.py
index 51249ad..7ae2435 100644
--- a/src/tests/controls/test_device.py
+++ b/src/tests/controls/test_device.py
@@ -9,4 +9,6 @@ class DeviceLifecycleStateTest(TestCase):
         pass
 
     def test_enum(self):
-        self.assertEqual(DeviceLifecycleStateTest["INIT"], DeviceLifecycleStateTest.INIT)
+        # NOTE: это имеется в виду?
+        # self.assertEqual(DeviceLifecycleStateTest["INIT"], DeviceLifecycleStateTest.INIT)
+        self.assertEqual(DeviceLifecycleState["INIT"], DeviceLifecycleState.INIT)