docs: def readAccelRange( self ):
          """!
          Reads the range of accelerometer setup.
          
          @return an int value.
            It should be one of the following values:
                @see ACCEL_RANGE_2G
                @see ACCEL_RANGE_4G
                @see ACCEL_RANGE_8G
                @see ACCEL_RANGE_16G
          """
          raw_data = self._readByte(self.REG_ACCEL_CONFIG)
          raw_data = (raw_data | 0xE7) ^ 0xE7
          return raw_data