code: public void disconnect() throws Exception {
  		if (session != null) {
  			session.getCloseFuture().awaitUninterruptibly();
  		}
  		if (connector != null) {
  			connector.dispose();
  		}
  	}
docs: Stop communicating with the IT-100 and release the port.
  @throws Exception If there is an error while trying to close the port.