diff --git a/model.py b/model.py
index f032b12..370770d 100644
--- a/model.py
+++ b/model.py
@@ -1,38 +1,77 @@
-from typing import Dict
+from datetime import datetime, timedelta
+from pathlib import Path
+from typing import Annotated, Dict, List, Self
 
-from pydantic import (
-    BaseModel,
-    ValidationError,
-    field_validator,
-)
+import yaml
+from astral import SunDirection
+from pydantic import BaseModel, BeforeValidator, ValidationError, conint, root_validator
 
 
-def validate_int(v):
-    if not len(bytes(v)) == 1:
-        raise ValidationError()
+def str_to_timedelta(input_str: str) -> timedelta:
+    try:
+        hours, minutes, seconds = map(int, input_str.split(':'))
+        return timedelta(hours=hours, minutes=minutes, seconds=seconds)
+    except Exception:
+        return timedelta()
+    
+
+def str_to_direction(input_str: str) -> SunDirection:
+    if input_str.lower() == 'setting':
+        return SunDirection.SETTING
+    elif input_str == 'rising':
+        return SunDirection.RISING
+    else:
+        raise ValidationError(f'Invalid sun direction: {input_str}')
+
+
+OffDuration = Annotated[timedelta, BeforeValidator(str_to_timedelta)]
 
 
 class State(BaseModel):
     state: bool = True
-    brightness: int = None
-    color_temp: int = None
-
-    @field_validator('brightness')
-    @classmethod
-    def validate_brightness(cls, v: int) -> int:
-        assert 0 <= v <= 255
-        return v
-
-    @field_validator('color_temp')
-    @classmethod
-    def validate_color_temp(cls, v: int) -> int:
-        assert 200 <= v <= 600
-        return v
+    brightness: conint(ge=1, le=255) = None
+    color_temp: conint(ge=200, le=650) = None
 
 
-# Scene = RootModel[Dict[str, State]]
+class ApplyKwargs(BaseModel):
+    """Arguments to call with the 'scene/apply' service"""
 
-
-class ApplyScene(BaseModel):
     entities: Dict[str, State]
     transition: int = None
+
+
+class ControllerStateConfig(BaseModel):
+    time: str | datetime = None
+    elevation: float = None
+    direction: Annotated[SunDirection, BeforeValidator(str_to_direction)] = None
+    off_duration: OffDuration = None
+    scene: Dict[str, State]
+
+    @root_validator(pre=True)
+    def check_args(cls, values):
+        time, elevation = values.get('time'), values.get('elevation')
+        if time is None and elevation is None:
+            raise ValueError('Either time or elevation must be set.')
+        elif time is not None and elevation is not None:
+            raise ValueError('Only one of time or elevation can be set.')
+        elif elevation is not None:
+            assert 'direction' in values
+        return values
+
+    def to_apply_kwargs(self, transition: int = 0):
+        return ApplyKwargs(entities=self.scene, transition=transition).model_dump(exclude_none=True)
+
+
+class RoomConfig(BaseModel):
+    states: List[ControllerStateConfig]
+    off_duration: OffDuration = None
+
+    @classmethod
+    def from_yaml(cls: Self, yaml_path: Path):
+        yaml_path = Path(yaml_path)
+        with yaml_path.open('r') as f:
+            for appname, app_cfg in yaml.load(f, Loader=yaml.SafeLoader).items():
+                if app_cfg['class'] == 'RoomController':
+                    break
+        print(app_cfg)
+        return cls(**app_cfg)
diff --git a/room_control.py b/room_control.py
index 6c3a244..209a217 100755
--- a/room_control.py
+++ b/room_control.py
@@ -11,7 +11,7 @@ from appdaemon.plugins.hass.hassapi import Hass
 from appdaemon.plugins.mqtt.mqttapi import Mqtt
 from astral import SunDirection
 from console import console, setup_handler
-from model import ApplyScene
+from model import ApplyKwargs
 from rich.console import Console, ConsoleOptions, RenderResult
 from rich.table import Column, Table
 
@@ -74,11 +74,11 @@ class RoomState:
             collapse_padding=True,
         )
         for name, state in self.scene.items():
-            table.add_row(name, ApplyScene(entites=self.scene).model_dump(exclude_none=True))
+            table.add_row(name, ApplyKwargs(entites=self.scene).model_dump(exclude_none=True))
         yield table
 
-    def scene_model(self) -> ApplyScene:
-        return ApplyScene(
+    def scene_model(self) -> ApplyKwargs:
+        return ApplyKwargs(
             entities=self.scene,
             transition=0
         ).model_dump(exclude_none=True)
@@ -119,7 +119,7 @@ class RoomConfig:
             collapse_padding=True,
         )
         for state in self.states:
-            scene_json = ApplyScene(entities=state.scene).model_dump(exclude_none=True)
+            scene_json = ApplyKwargs(entities=state.scene).model_dump(exclude_none=True)
             lines = [
                 f'{name:20}{state["state"]}   Brightness: {state["brightness"]:<4}  Temp: {state["color_temp"]}'
                 for name, state in scene_json['entities'].items()
@@ -363,7 +363,7 @@ class RoomController(Hass, Mqtt):
             self.log(f'Turned on scene: {scene}')
 
         elif isinstance(scene, dict):
-            kwargs = ApplyScene(entities=scene, transition=0).model_dump(exclude_none=True)
+            kwargs = ApplyKwargs(entities=scene, transition=0).model_dump(exclude_none=True)
             self.log('Validated scene JSON', level='DEBUG')
             self.call_service('scene/apply', **kwargs)
             if self.logger.isEnabledFor(logging.INFO):