通过 HC-05 蓝牙将变量值或字符串从 Android 应用程序发送到 Arduino

Question

我正在使用 Android Studio 创建一个 Android 应用程序。当我按下一个按钮时，我想通过蓝牙 HC-05 向 Arduino 发送一个变量值，也许在串行监视器中打印它。这是我正在使用的代码，但它没有按预期工作。

BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();   
BluetoothDevice hc05 = btAdapter.getRemoteDevice("98:D3:91:FD:3E:F0");


BluetoothSocket btSocket = null;

    try {
        btSocket = hc05.createRfcommSocketToServiceRecord(mUUID);            
        btSocket.connect();
    } catch (IOException e) {
        e.printStackTrace();
    }

BluetoothSocket finalBtSocket = btSocket;

button12.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {

       
        try {
            OutputStream outputStream = finalBtSocket.getOutputStream();
            finalBtSocket.getOutputStream().write("S".toString().getBytes());
           //outputStream.write(Integer.parseInt(puk));
        } catch (IOException e) {
            e.printStackTrace();
        }
        
    }
});

我将“puk”变量插入另一个活动，并将其传递给该活动。我想要的是能够在串行监视器中打印该变量的值。

如果您有任何可以帮助的信息，我们将不胜感激。

Answer 1

尝试使用此代码：

BluetoothSocket btSocket = null;

        try {
            btSocket = hc05.createRfcommSocketToServiceRecord(mUUID);
            
            btSocket.connect();

            AlertDialog.Builder builder = new AlertDialog.Builder(Status_Poarta.this);

            builder.setCancelable(true);

            builder.setMessage("Connection is successful");

            builder.setNegativeButton("Ok", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });
            builder.show();





        } catch (IOException e) {
            e.printStackTrace();

            AlertDialog.Builder builder = new AlertDialog.Builder(Status_Poarta.this);

            builder.setCancelable(true);

            builder.setMessage("No connection established");

            builder.setNegativeButton("Ok", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });
            builder.show();


        }

    BluetoothSocket finalBtSocket = btSocket;

    
    button12.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            
            try {
                OutputStream outputStream = finalBtSocket.getOutputStream();                 
                outputStream.write(puk.getBytes());   
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    });