code: public float readFloat(GroupAddress dst) throws KNXTimeoutException,
  		KNXRemoteException, KNXLinkClosedException, KNXFormatException
  	{
  		final byte[] apdu = readFromGroup(dst, priority, 2, 2);
  		final DPTXlator2ByteFloat t =
  			new DPTXlator2ByteFloat(DPTXlator2ByteFloat.DPT_TEMPERATURE_DIFFERENCE);
  		extractGroupASDU(apdu, t);
  		return t.getValueFloat();
  	}
docs: /* (non-Javadoc)
  @see tuwien.auto.calimero.process.ProcessCommunicator#readFloat
  (tuwien.auto.calimero.GroupAddress)