Index: __init__.py
==================================================================
--- __init__.py
+++ __init__.py
@@ -218,10 +218,13 @@
 		if len(self.__register_map) != 53:
 			raise ValueError('Inconsistent register map!')
 
 		return None
 
+	def __del__(self):
+		self.__spi.close()
+
 	def __debug(self, message):
 		print("DEBUG: " + message)
 		return None
 
 	def __reset_device(self):
@@ -385,10 +388,13 @@
 		# Return the filled in structure
 		return result
 
 	def configure(self, config):
 		self.__config = config
+
+		if config is None:
+			return None
 
 		self.__spi.max_speed_hz = self.__config.get('frequency', 4000000)
 
 		return None