ActionListener task = new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent e) {
                String sql = "SELECT SensorID, luchtkwaliteit, tijdstip FROM tbl1 ORDER BY tijdstip DESC LIMIT 1";
                System.out.println("Updating sql");
                try {
                    Connection conn = getConnection();
                    Statement statement = conn.createStatement();
                    ResultSet rs = statement.executeQuery(sql);
                    if(rs.next()){
                        tijdVar.setText(rs.getString("tijdstip").substring(11));
                        luchtVariable = rs.getInt("luchtkwaliteit");
                        sensorVariable = rs.getString("SensorID");
                    }

                } catch (SQLException ex) {
                    Logger.getLogger(dashboard.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        };
        Timer timer = new Timer(10000, task);
        timer.setRepeats(true);
        timer.start();