json works

src/orisys/configs/__init__.py

@@ -4,11 +4,44 @@ from pathlib import Path
 CONFIG_DIR = Path(__file__).parent
 
 def load_config(config_name: str):
+    """
+    Load sensor configuration from JSON file.
+    
+    Args:
+        config_name: Name of the config file (without .json extension)
+    
+    Returns:
+        Dictionary containing the configuration
+    
+    Raises:
+        FileNotFoundError: If the config file doesn't exist
+    """
     config_path = CONFIG_DIR / f"{config_name}.json"
+    
+    if not config_path.exists():
+        # List available configs for better error message
+        available = [f.stem for f in CONFIG_DIR.glob("*.json")]
+        available_str = ", ".join(available) if available else "none"
+        raise FileNotFoundError(
+            f"Config file not found: {config_path}\n"
+            f"Available configs: {available_str}"
+        )
+    
     with open(config_path, 'r') as f:
         return json.load(f)
     
 def save_config(config: dict, config_name: str):
+    """
+    Save sensor configuration to JSON file.
+    
+    Args:
+        config: Dictionary containing the configuration
+        config_name: Name of the config file (without .json extension)
+    
+    Returns:
+        Path to the saved config file
+    """
     config_path = CONFIG_DIR / f"{config_name}.json"
     with open(config_path, 'w') as f:
-        json.dump(config, f, indent=4)
+        json.dump(config, f, indent=4)
+    return config_path