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:
            self.deviceConnected = False

            # init serial port
            self._connect()

            if self.firmwarePrefix in self.UIStatusMsg:
                self.deviceConnected = True
            else:
                self.UIStatusMsg = "Firmware Not Matching Expecting " + self.firmwarePrefix + " Now is " + self.UIStatusMsg
                ModuleHelper.WriteIntoDebugLogger("Err: OpenThread device Firmware not matching..")

        except Exception, e:
            ModuleHelper.WriteIntoDebugLogger("intialize() Error: " + str(e))
            self.deviceConnected = False