fix #23: fix a problem when closing the device connection in the reader

The serial port is only closed in the XBee reader if the process has not
been stopped and the serial port is still open.

Signed-off-by: Ruben Moral <ruben.moral@digi.com>

Author: rubenmoral

digi/xbee/devices.py

@@ -1278,8 +1278,6 @@ def close(self):
 
         if self._packet_listener is not None:
             self._packet_listener.stop()
-            # Wait 100 ms before closing the port.
-            time.sleep(0.1)
 
         if self._serial_port is not None and self._serial_port.isOpen():
             self._serial_port.close()

digi/xbee/reader.py

@@ -324,10 +324,13 @@ def run(self):
                     # Execute all user callbacks.
                     self.__execute_user_callbacks(read_packet, remote)
         except Exception as e:
-            self.__xbee_device.serial_port.close()
-            self._log.exception(e)
+            if not self.__stop:
+                self._log.exception(e)
         finally:
-            self.__stop = True
+            if not self.__stop:
+                self.__stop = True
+                if self.__serial_port.isOpen():
+                    self.__serial_port.close()
 
     def stop(self):
         """