diff --git a/README.md b/README.md
index 03e6ced..4f3ebbe 100644
--- a/README.md
+++ b/README.md
@@ -15,4 +15,12 @@ $ cd src/docs
 $ make html
 ```
 
+# How to run Pytest tests
+
+```
+$ export PYTHONPATH=src
+$ pytest
+```
+
+
 
diff --git a/src/controls/device.py b/src/controls/device.py
new file mode 100644
index 0000000..fe85384
--- /dev/null
+++ b/src/controls/device.py
@@ -0,0 +1,96 @@
+from dataclasses import dataclass
+from typing import Optional, Collection, Any
+from abc import abstractmethod, ABC
+import enum
+
+
+class DeviceLifecycleState(enum.Enum):
+    INIT  = "INIT"
+    OPEN  = "OPEN"
+    CLOSE = "CLOSE"
+
+
+class DeviceError(Exception):
+    pass
+
+
+class NonReadableTrait(Exception):
+    pass
+
+
+class NonWritableTrait(Exception):
+    pass
+
+
+class NoSuchTrait(Exception):
+    pass
+
+class NoSuchAction(Exception):
+    pass
+
+@dataclass
+class TraitDescriptor:
+    name: str
+    info: Optional[str] = None
+    readable: bool = True
+    writable: bool = False
+
+
+@dataclass
+class ActionDescriptor:
+    name: str
+    arguments: dict[str, type]
+    info: Optional[str] = None
+
+
+class Device(ABC):
+    _state = DeviceLifecycleState.INIT
+
+    @property
+    def state(self) -> DeviceLifecycleState:
+        return self._state
+
+    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
+
+    @abstractmethod
+    def __getitem__(self, trait_name: str) -> Optional[Any]:
+        """Return logical state of trait `trait_name`."""
+        pass
+
+
+class SynchronyDevice(Device):
+
+    def open(self):
+        self._state = DeviceLifecycleState.OPEN
+
+    @abstractmethod
+    def execute(self, action_name: str, *args, **kwargs):
+        """Execute action `action_name`, using `args` and `kwargs` as action argument."""
+        pass
+
+    @abstractmethod
+    def read(self, trait_name: str) -> Any:
+        """Read physical state of trait `trait_name` from device."""
+        raise NonReadableTrait
+
+    @abstractmethod
+    def write(self, trait_name: str, value: Any) -> bool:
+        """Pass `value` to trait `trait_name` of device."""
+        raise NonWritableTrait
+
+    @abstractmethod
+    def invalidate(self, trait_name: str):
+        """Invalidate logical state of trait `trait_name`"""
+        pass
\ No newline at end of file
diff --git a/src/controls/smth.py b/src/controls/smth.py
deleted file mode 100644
index 18d956c..0000000
--- a/src/controls/smth.py
+++ /dev/null
@@ -1,4 +0,0 @@
-
-def multiply(a:int, b:int) -> int:
-    """Multiply two ints"""
-    return a*b
\ No newline at end of file
diff --git a/src/equipment/__init__.py b/src/equipment/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/equipment/turtle_device.py b/src/equipment/turtle_device.py
new file mode 100644
index 0000000..d1b4e14
--- /dev/null
+++ b/src/equipment/turtle_device.py
@@ -0,0 +1,103 @@
+from turtle import Turtle
+from controls.device import (
+    SynchronyDevice,
+    TraitDescriptor,
+    ActionDescriptor,
+    NoSuchTrait,
+    NoSuchAction,
+)
+from typing import Collection, Optional, Any
+import inspect
+
+
+class TurtleDevice(SynchronyDevice):
+    def __init__(self) -> None:
+        super().__init__()
+        self.open()
+
+    def open(self) -> None:
+        self.turtle = Turtle()
+
+    def close(self) -> None:
+        del self.turtle
+        self.close()
+
+    def execute(self, action_name: str, *args, **kwargs) -> None:
+        actions = self.action_descriptors
+        for action in actions:
+            if action.name == action_name:
+                # NOTE: судя по заданию, должен быть такой assert,
+                # но почему-то у меня inspect плохо спарсил типы именно для Turtle
+                # везде empty_time, хотя судя по доке в модуле typos проставлены
+                # при чем тестировал на pd.DataFrame, там все прекрасно парсит
+                # for argument in kwargs:
+                #     action_tmp_argument_type = action.arguments[argument]
+                #     given_method_tmp_argument = type(kwargs[argument])
+                #     assert (
+                #         action_tmp_argument_type == given_method_tmp_argument
+                #     ), f"Переданный аргумент должен быть типа {action_tmp_argument_type}, вы передали {given_method_tmp_argument}"
+                getattr(self.turtle, action_name)(*args, **kwargs)
+                return
+        raise NoSuchAction
+
+    def read(self, trait_name: str) -> Any:
+        return Turtle().__getattribute__(trait_name)
+
+    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) -> None:
+        self.write(trait_name=trait_name, value=Turtle().__getattribute__(trait_name))
+        return
+
+    def __getitem__(self, trait_name: str) -> Optional[Any]:
+        traits = self.trait_descriptors
+        for trait in traits:
+            if trait.name == trait_name:
+                return self.turtle.__getattribute__(trait_name)
+        raise NoSuchTrait
+
+    @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)
+            parameters = inspect.signature(method).parameters
+
+            arg_types = {}
+            for arg_name, arg in parameters.items():
+                arg_types[arg_name] = parameters[arg_name].annotation
+
+            result.append(
+                ActionDescriptor(
+                    name=method_name, info=method.__doc__, arguments=arg_types
+                )
+            )
+        return result
diff --git a/src/other_module/__init__.py b/src/other_module/__init__.py
deleted file mode 100644
index 874b243..0000000
--- a/src/other_module/__init__.py
+++ /dev/null
@@ -1,3 +0,0 @@
-"""
-Just other sample module
-"""
\ No newline at end of file
diff --git a/src/other_module/snth2.py b/src/other_module/snth2.py
deleted file mode 100644
index b48e8e0..0000000
--- a/src/other_module/snth2.py
+++ /dev/null
@@ -1,4 +0,0 @@
-
-def add(a:int, b:int) -> int:
-    """Add two ints"""
-    return a + b
\ No newline at end of file
diff --git a/tests/controls/test_device.py b/tests/controls/test_device.py
new file mode 100644
index 0000000..3e8bf7d
--- /dev/null
+++ b/tests/controls/test_device.py
@@ -0,0 +1,7 @@
+import pytest
+
+from controls.device import DeviceLifecycleState
+
+
+def test_enum():
+    assert DeviceLifecycleState["INIT"] == DeviceLifecycleState.INIT
diff --git a/tests/equipment/test_turtle_device.py b/tests/equipment/test_turtle_device.py
new file mode 100644
index 0000000..f63d336
--- /dev/null
+++ b/tests/equipment/test_turtle_device.py
@@ -0,0 +1,58 @@
+import pytest
+
+from equipment.turtle_device import TurtleDevice
+
+
+def test_setup():
+    td = TurtleDevice()  # не падает
+
+
+@pytest.mark.parametrize(
+    ("trait", "value"), [("DEFAULT_MODE", "standard"), ("DEFAULT_ANGLEOFFSET", 0.0)]
+)
+def test_read(trait, value):
+    td = TurtleDevice()
+    assert td.read(trait) == value
+
+
+@pytest.mark.parametrize(
+    ("trait", "value_to_pass"),
+    [
+        ("DEFAULT_ANGLEOFFSET", 1),
+        ("DEFAULT_ANGLEOFFSET", 2),
+        pytest.param("DEFAULT_ANGLEOFFSET", 3.0, marks=pytest.mark.xfail),
+        ("DEFAULT_MODE", "other_mode"),
+    ],
+)
+def test_write(trait, value_to_pass):
+    td = TurtleDevice()
+    td.write(trait, value_to_pass)
+    assert td[trait] == value_to_pass
+
+
+@pytest.mark.parametrize(
+    ("trait", "value_to_pass"),
+    [
+        ("DEFAULT_ANGLEOFFSET", 10),
+        ("DEFAULT_MODE", "other mode"),
+    ],
+)
+def test_invalidate(trait, value_to_pass):
+    td = TurtleDevice()
+    td.write(trait, value_to_pass)
+    assert td[trait] != td.read(trait)
+    td.invalidate(trait)  # сносит логическое значение
+    assert td[trait] == td.read(trait)
+
+
+@pytest.mark.parametrize(
+    ("action", "args", "expected"),
+    [
+        ("back", {"distance": 5.0}, (-5.0, 0.0)),
+        pytest.param("back", {"distance": 5.0}, (0.0, -5.0), marks=pytest.mark.xfail),
+    ],
+)
+def test_execute(action, args, expected):
+    td = TurtleDevice()
+    td.execute(action, **args)
+    assert td.turtle.pos() == expected