我有一个Arduino蓝牙盾牌HC-05。我首先使用Android设备配对蓝牙防护罩，并尝试通过蓝牙防护罩将数据发送到Arduino。 Android应用将数据发送到屏蔽。但Arduino没有收到超过（4到13）次的命令，我认为我的应用程序没有正确地与蓝牙屏蔽保持连接，我不确定这个问题。我尝试使用与其他Android应用程序相同的Arduino代码。它运作良好。所以问题只在我的代码中。我正在使用日志来监控代码流。数据从Android设备发送，蓝牙处于实时状态且仍然配对。我认为蓝牙盾没有收到或者它正在接收而没有将数据传递给Arduino。我困扰了几个星期。
先谢谢!!
我的代码在这里......
private BluetoothAdapter mBluetoothAdapter = null;
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
private static String address = "98:D3:31:30:25:DC";//old: 20:14:12:03:12:42, 98:D3:31:30:25:DC
private static final UUID MY_UUID = UUID
.fromString("00001101-0000-1000-8000-00805F9B34FB");
private InputStream inStream = null;
Handler handler = new Handler();
byte delimiter = 10;
boolean stopWorker = false;
int readBufferPosition = 0;
byte[] readBuffer = new byte[1024];
//
//Bluetooth sender ends
//
//
private final BroadcastReceiver commandAction = new BroadcastReceiver() {
@Override
public void onReceive(Context context2, Intent intent2) {
String com = intent2.getStringExtra("key");
commandAction(com);
Toast.makeText(context2, "commandAction:"+com, Toast.LENGTH_SHORT).show();
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
commandAction("up");
}
});
GCMRegistrar.checkDevice( this );
GCMRegistrar.checkManifest( this );
final String regId = GCMRegistrar.getRegistrationId( this );
if( regId.equals( "" ) ) {
GCMRegistrar.register( this, "501396392354" );
Toast.makeText(this," 501396392354", Toast.LENGTH_SHORT).show();
}
else {
Toast.makeText(this,regId, Toast.LENGTH_SHORT).show();
Log.v( TAG2, "Already registered" );
Log.v(TAG2, "Registration id is: " + regId );
}
startService(new Intent(MainActivity.this, LocationService.class));
CheckBt();
Connect();
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
Log.e("Jon", device.toString());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public Object onRetainNonConfigurationInstance() {
if (mAccessory != null) {
return mAccessory;
} else {
return super.onRetainNonConfigurationInstance();
}
}
@Override
public void onResume() {
super.onResume();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("in.robot.gcm.commandaction");
registerReceiver(commandAction, intentFilter);
if (mInputStream != null && mOutputStream != null) {
return;
}
}
@Override
public void onPause() {
super.onPause();
unregisterReceiver(commandAction);
closeAccessory();
}
@Override
public void onDestroy() {
unregisterReceiver(mUsbReceiver);
stopService(new Intent(MainActivity.this, LocationService.class));
try {
btSocket.close();
} catch (IOException e) {
}
super.onDestroy();
}
private void openAccessory(UsbAccessory accessory) {
mFileDescriptor = mUsbManager.openAccessory(accessory);
if (mFileDescriptor != null) {
mAccessory = accessory;
FileDescriptor fd = mFileDescriptor.getFileDescriptor();
mInputStream = new FileInputStream(fd);
mOutputStream = new FileOutputStream(fd);
Log.d(TAG, "accessory opened");
} else {
Log.d(TAG, "accessory open fail");
}
}
private void closeAccessory() {
try {
if (mFileDescriptor != null) {
mFileDescriptor.close();
}
} catch (IOException e) {
} finally {
mFileDescriptor = null;
mAccessory = null;
}
}
public void commandAction(String command){
byte[] buffer = new byte[1];
MediaPlayer mp;
Toast.makeText(this,"in cmd action",Toast.LENGTH_SHORT).show();
if("up".equals(command)){
buffer[0]=(byte)0;
Log.v(TAG ,"up heay");
writeData("1");
Toast.makeText(this,"UP",Toast.LENGTH_SHORT).show();
}
else if("down".equals(command)) {
buffer[0]=(byte)1;
Log.v(TAG ,"down heay");
writeData("2");
}
else if("left".equals(command)){
buffer[0]=(byte)2;
writeData("3");
}
else if("right".equals(command)){
buffer[0]=(byte)3;
writeData("4");
}
else if("break".equals(command)){
buffer[0]=(byte)4;
writeData("0");
}
else if("camera left".equals(command)){
buffer[0]=(byte)5;
//writeData("0");
}
else if("camera right".equals(command)){
buffer[0]=(byte)6;
//writeData("0");
}
else if ("jigsaw1".equals(command)){
mp = MediaPlayer.create(MainActivity.this, R.raw.jigsaw1);
mp.start();
}
else if("jigsaw2".equals(command)){
mp = MediaPlayer.create(MainActivity.this, R.raw.jigsaw2);
mp.start();
}
else if("horn".equals(command)){
mp = MediaPlayer.create(MainActivity.this, R.raw.horn);
mp.start();
}
else if("start".equals(command)){
mp = MediaPlayer.create(MainActivity.this, R.raw.start);
mp.start();
}
else if("ghosts".equals(command)){
mp = MediaPlayer.create(MainActivity.this, R.raw.ghosts);
mp.start();
}
else if("flash on".equals(command)){
if((this.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) && !(isLighOn)){
cam = Camera.open();
Parameters params = cam.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_ON);
cam.setParameters(params);
cam.startPreview();
isLighOn=true;
Log.v("camera","flash on");
}
else{Log.v("camera","flash not exsisted");}
}
else if("flash off".equals(command)){
if(isLighOn){
cam.stopPreview();
cam.release();
isLighOn=false;
Log.v("camera","flash off");
} }
else if("location on".equals(command)){
startService(new Intent(MainActivity.this, LocationService.class));
}
else if("location off".equals(command)){
stopService(new Intent(MainActivity.this, LocationService.class));
}
else if("speed min".equals(command)){
buffer[0]=(byte)7;
}
else if("speed min".equals(command)){
buffer[0]=(byte)8;
}
else if("speed max".equals(command)){
buffer[0]=(byte)9;
}
else{
Log.v(TAG ,"no command recieved");}
if (mOutputStream != null) {
try {
mOutputStream.write(buffer);
} catch (IOException e) {
Log.e(TAG, "write failed", e);
}
}
}
//
//
//
//
private void CheckBt() {
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (!mBluetoothAdapter.isEnabled()) {
Toast.makeText(getApplicationContext(), "Bluetooth Disabled !",
Toast.LENGTH_SHORT).show();
}
if (mBluetoothAdapter == null) {
Toast.makeText(getApplicationContext(),
"Bluetooth null !", Toast.LENGTH_SHORT)
.show();
}
}
public void Connect() {
Log.d(TAG, address);
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
Log.d(TAG, "Connecting to ... " + device);
Toast.makeText(this, "Connecting to...", Toast.LENGTH_SHORT).show();
mBluetoothAdapter.cancelDiscovery();
try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
btSocket.connect();
Log.d(TAG, "Connection made.");
Toast.makeText(this, "Connection made Successful..", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
try {
btSocket.close();
} catch (IOException e2) {
Log.d(TAG, "Unable to end the connection");
Toast.makeText(this, "Unable to end the connection", Toast.LENGTH_SHORT).show();
}
Log.d(TAG, "Socket creation failed");
Toast.makeText(this, "connection creation failed", Toast.LENGTH_SHORT).show();
}
//beginListenForData();
}
private void writeData(String data) {
try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
Log.d(TAG, "Bug BEFORE Sending stuff", e);
}
String message = data;
byte[] msgBuffer = message.getBytes();
try {
outStream.write(msgBuffer);
Toast.makeText(this, "Data Send Successful..", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
Log.d(TAG, "Bug while sending stuff", e);
Toast.makeText(this, "Data Send Error..", Toast.LENGTH_SHORT).show();
}
}
}