initialize the serial port with baudrate, timeout parameters

def intialize(self):
        """initialize the serial port with baudrate, timeout parameters"""
        print '%s call intialize' % self.port
        try:
            # init serial port
            self.deviceConnected = False
            self._connect()

            if self.deviceConnected:
                self.UIStatusMsg = self.getVersionNumber()
                if self.firmwarePrefix not in self.UIStatusMsg:
                    self.deviceConnected = False
                    self.UIStatusMsg = 'Firmware Not Matching Expecting ' + self.firmwarePrefix + ' Now is ' + self.UIStatusMsg
                    raise Exception('Err: OpenThread device Firmware not matching..')
                self.__sendCommand(WPANCTL_CMD + 'leave')
                self.__sendCommand(WPANCTL_CMD + 'dataset erase')
            else:
                raise Exception('Err: Device not connected ..')

        except Exception, e:
            ModuleHelper.WriteIntoDebugLogger('intialize() Error: ' + str(e))