private void addFile(File file) throws SerialPortException
    {
        try {
            System.out.println("Start of add file");
            serialCommunication.openPort(port,"115200");
            String[] waitForResponse = {"ERROR","CONNECTED"};
            byte[] fileData = new byte[(int) file.length()];
            System.out.println("file data to string " + new String(fileData.toString()));
            DataInputStream dis = new DataInputStream(new FileInputStream(file));
            dis.readFully(fileData); //file gets converted to bytes
            dis.close();
            serialCommunication.send("AT^SJDL=1," + file.length() + ",\"" + file.getName() + "\"",waitForResponse,5000);
            System.out.println("check if connected");
            if(!SerialCommunication.serialResponseManager.getLastResponse().equals("ERROR"))//check if AT command was ok
            {
                System.out.println("CONNECTED");
                serialCommunication.send(fileData); //file data gets sent
                System.out.println("file upload finished");
                serialCommunication.close();
            }
            else
            {
                System.out.println("FAILED TO START UPLOAD OF FILE");
                serialCommunication.close();
            }
        }
        catch (Exception ex)
        {
            System.out.println("Exception on addFile " + ex);
            serialCommunication.close();
        }
    }