Adaption to new logging

__init__.py

 import serial
 import time
 
-logger_name = 'SERIAL_INTERFACE'
-logger = logging.getLogger(logger_name)
+try:
+    from config import APP_NAME as ROOT_LOGGER_NAME
+except ImportError:
+    ROOT_LOGGER_NAME = 'root'
+logger = logging.getLogger(ROOT_LOGGER_NAME).getChild(__name__)
 
 
 class serial_interface(object):