Android BluetoothGatt - status 133 - register callback

Question

First of all I read SOLVED: GATT callback fails to register and took the steps suggested in that post to solve this issue with no success. The recommended fix in there if you ha

Answer 1

Android OS < 6.0：

mBluetoothDevice.connectGatt(context, false, callback);

Android OS >= 6.0：

mBluetoothDevice.connectGatt(context, false, callback, BluetoothDevice.TRANSPORT_LE);

Ultimately, hardware equipment is needed to completely solve this problem.

Answer 2

After months of research and pulling my hair out, I have found a solution that is not normally talked about.

Your normal connect request looks something like this:

cGatt.connectGatt(this, false, gattCallback);

There is another version of the connectGatt command, with a 4th parameter. This parameter specifies what type of bluetooth device you are connecting to. I added a "2" to specify that I am connecting via Bluetooth LE. (it's called "transport", forgive me if my explanation is incorrect, but it solved all my problems)

Try this:

cGatt.connectGatt(this, false, gattCallback, 2);

And BAM, now my #133 nightmare is over (I pray)!

Answer 3

Somehow BluetoothLeScanner.startScan() helps

private final Handler mMainHandler = new Handler(Looper.getMainLooper());
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
    if (newState == BluetoothProfile.STATE_CONNECTED) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && mBluetoothAdapter.isEnabled() && mBleScanner != null) {
            mBleScanner.stopScan(mLeScanCallback);
        }
    } else if (status == 133 && newState == BluetoothProfile.STATE_DISCONNECTED) {
        if (D) Log.e(TAG, "connectGatt status == 133");
        mMainHandler.post(mDisconnectRunnable);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && mBluetoothAdapter.isEnabled()) {
            mBleScanner = mBluetoothAdapter.getBluetoothLeScanner();
            mBleScanner.startScan(null, new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY).build(),
                    mLeScanCallback);
        }
        mMainHandler.postDelayed(mConnectRunnable, 10000);
    }
}

private ScanCallback mLeScanCallback = new ScanCallback() {
    @Override
    public void onScanResult(int callbackType, ScanResult result) {
        super.onScanResult(callbackType, result);
        if (result.getDevice().getAddress().equals(mBluetoothDeviceAddress)) {
            mMainHandler.post(mConnectRunnable);
            if (mBleScanner != null) {
                mBleScanner.stopScan(mLeScanCallback);
                mBleScanner = null;
            }
        }
    }
};

Answer 4

Alright I have figured it out. The issue was mainly an oversight of when I was reading through the BluetoothGatt documentation. I was calling .disconnect(), but not .close(). Since the Galaxy s4 can only handle 6 connections at a time, my service was only running 6 times. Adding the .close() to my code allowed it to properly shut down the connection and freed up those used connections.

Source that made me re-read the docs more carefully!

So remember to use .close() on your BluetoothGatt object if you have a recurring connection to the same device(s)!!

Answer 5

Try to use next workaround:

private static boolean gatt_status_133 = false;

final Handler handler = new Handler();

public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {

    if (newState == BluetoothProfile.STATE_CONNECTED) {
        mConnectionState = STATE_CONNECTED;
        Log.i(TAG, "Connected to GATT server.");
        // Attempts to discover services after successful connection.
        Log.i(TAG, "Attempting to start service discovery:" +
                mBluetoothGatt.discoverServices());

    } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
        if(status == 133)
        {
            gatt_status_133=true;
        }
        else{
            mConnectionState = STATE_DISCONNECTED;
            Log.i(TAG, "Disconnected from GATT server."); 
        }
    }
}


@RequiresApi(api = Build.VERSION_CODES.M)
public boolean connect(final String address) {
    if (mBluetoothAdapter == null || address == null) {
        Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
        return false;
    }

    // Previously connected device.  Try to reconnect.
    if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress)
            && mBluetoothGatt != null) {
        Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection.");
        if (mBluetoothGatt.connect()) {
            mConnectionState = STATE_CONNECTING;
            return true;
        } else {
            return false;
        }
    }

    final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
    if (device == null) {
        Log.w(TAG, "Device not found.  Unable to connect.");
        return false;
    }

    mBluetoothGatt= device.connectGatt(this, false, mGattCallback, BluetoothDevice.TRANSPORT_LE);
    Log.d(TAG, "Trying to create a new connection.");
    mBluetoothDeviceAddress = address;
    mConnectionState = STATE_CONNECTING;

    handler.postDelayed(new Runnable() {
        @Override
        public void run() {
            if(gatt_status_133)
            {
                Log.d(TAG, "Catch issue");
                connect(address);
                gatt_status_133=false;
            }
        }
    }, 4000);

    return true;
}

Answer 6

• On some devices, it got fixed with mBluetoothDevice.connectGatt(context, false, callback, BluetoothDevice.TRANSPORT_LE);

• on some devices like Samsung S7, A8, it was a problem with the ScanSettings.Builder().setReportDelay(400) // or 500ms. it should not be 0 or more like 1000ms. ScanSettings settings = new ScanSettings.Builder() .setScanMode(ScanSettings.SCAN_MODE_BALANCED) .setReportDelay(400) .build();