public String currentValue(String sensor_id) throws NotFoundException, IllegalAccessError, NonReadableChannelException, SocketTimeoutException {
		try {
			clientSocket.Escribir("GET_VALACT " + sensor_id + '\n');
			serverAnswer = clientSocket.Leer();
		} catch (IOException e) {
			throw new SocketTimeoutException();
		}
		if(serverAnswer.contains("525 ERR")) {
			throw new IllegalAccessError();
		} else if(serverAnswer.contains("526 ERR")) {
			throw new NonReadableChannelException();
		} else if(serverAnswer.contains("524 ERR")) {
			throw new NotFoundException();
		}
		System.out.println(serverAnswer);
		serverAnswer = serverAnswer.replace("224 OK ", "");
		return serverAnswer;
	}