def getBumperData(self):
        '''
        Returns last BumperData. 

        @return last JdeRobotTypes BumperData saved

        '''
        self.lock.acquire()
        t = current_milli_time()
        if (t - self.time) > 500:
            self.data.state = 0
        bump = self.data
        self.lock.release()
        
        return bump
Returns last BumperData. 

        @return last JdeRobotTypes BumperData saved