Enumeration commports = CommPortIdentifier.getPortIdentifiers();
            CommPortIdentifier myCPI = null;
            Scanner mySC = null;

            while (commports.hasMoreElements()) {
                myCPI = (CommPortIdentifier) commports.nextElement();
                if (myCPI.getName().equals("COM3"));
                break;
            }

            CommPort puerto = null;

            try {
                puerto = myCPI.open("Puerto Serial",1000);
            } catch (Exception e) {
                JOptionPane.showMessageDialog(jPanel1, "Error B1", "ERROR", JOptionPane.ERROR_MESSAGE);
            }

            SerialPort mySP = (SerialPort) puerto;
            try {
                mySP.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_2, SerialPort.PARITY_NONE);
            } catch (Exception e) {
                JOptionPane.showMessageDialog(jPanel1, "Error B2", "ERROR", JOptionPane.ERROR_MESSAGE);
            }

            try {
                Class.forName("com.mysql.jdbc.Driver");
            } catch (ClassNotFoundException ex) {
                JOptionPane.showMessageDialog(jPanel1, "Error B3", "ERROR", JOptionPane.ERROR_MESSAGE);
            }
            Connection conexion = null;
            try {
                conexion = DriverManager.getConnection("jdbc:mysql://localhost/basculas", "root", "cay0703081");
            } catch (SQLException ex) {
                JOptionPane.showMessageDialog(jPanel1, "Error B4", "ERROR", JOptionPane.ERROR_MESSAGE);
            }

            int k = 0;

            while (k == 0) {
                try {
                    mySC = new Scanner(mySP.getInputStream());
                } catch (IOException ex) {
                    JOptionPane.showMessageDialog(jPanel1, "Error B5", "ERROR", JOptionPane.ERROR_MESSAGE);
                }

                if (mySC.nextLine() != null) {
                    Statement st = null;
                    try {
                        st = conexion.createStatement();
                    } catch (SQLException ex) {
                        JOptionPane.showMessageDialog(jPanel1, "Error B6", "ERROR", JOptionPane.ERROR_MESSAGE);
                    }
                    try {
                        st.executeUpdate("UPDATE peso_bascula SET peso='" + mySC.nextLine() + "' WHERE id='1'");
                    } catch (SQLException ex) {
                        JOptionPane.showMessageDialog(jPanel1, "Error B7", "ERROR", JOptionPane.ERROR_MESSAGE);
                    }
                }
                //System.out.println (""+mySC.nextLine());
//                Thread.sleep(1000);

            }

        }
//            sleep(1000);

    } // Fin del while