docs: 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();
  	}