Mit BLE - Lesen GATT-Charakteristik

Ich versuche zu Lesen GATT charakteristische Werte von einem Bluetooth-LE-Gerät (Herzfrequenz-Armband). Die Spezifikationen sind:

Dienstleistungen

Merkmale

Habe ich noch nicht herausgefunden, wie man "Lesen" die technischen Daten und "übersetzen" Sie in code.

Ich muss auf meine app die Herzschläge erkannt von dem Gerät. Was ist der Weg zum Lesen der GATT-Werte? Ein code-Beispiel wäre sehr geschätzt 🙂

Folgen Sie meinen aktuellen source code.

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SETUP DIE BLUETOOT-VERBINDUNG

    private BluetoothAdapter mBluetoothAdapter;
    private BluetoothGatt mBluetoothGatt;
    private Handler mHandler;

    private static final int REQUEST_ENABLE_BT = 1;
    private static final long SCAN_PERIOD = 10000;

    //...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bluetooth);
        mHandler = new Handler();

        //BLE is supported?
        if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
            Toast.makeText(this, "Bluetooth Low Energy non supportato", Toast.LENGTH_SHORT).show();
            finish();
        }

        final BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
        mBluetoothAdapter = bluetoothManager.getAdapter();

        //Bluetooth is supported?
        if (mBluetoothAdapter == null) {
            Toast.makeText(this, "Bluetooth non supportato", Toast.LENGTH_SHORT).show();
            finish();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();

        //Bluetooth is enabled?
        if (!mBluetoothAdapter.isEnabled()) {
            Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
        }

        scanLeDevice(true);
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (mBluetoothAdapter != null && mBluetoothAdapter.isEnabled()) {
            scanLeDevice(false);
        }
    }

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ENTDECKEN BLE-GERÄTEN UND VERBINDEN SIE MIT HERZFREQUENZ MONITOR

    //Device scan callback.
    private BluetoothAdapter.LeScanCallback mLeScanCallback =
            new BluetoothAdapter.LeScanCallback() {
                @Override
                public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Log.i(TAG, "Name: " + device.getName() + " (" + device.getAddress() + ")");
                            String deviceAddress = device.getAddress();
                            if (deviceAddress.equals("C0:19:37:54:9F:30")) {
                                connectToDevice(device);
                            }
                        }
                    });
                }
            };

    public void connectToDevice(BluetoothDevice device) {
        if (mBluetoothGatt == null) {
            Log.i(TAG, "Attempting to connect to device " + device.getName() + " (" + device.getAddress() + ")");
            mBluetoothGatt = device.connectGatt(this, true, gattCallback);
            scanLeDevice(false);//will stop after first device detection
        }
    }

    private final BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
        @Override
        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
            Log.i(TAG, "Status: " + status);
            switch (newState) {
                case BluetoothProfile.STATE_CONNECTED:
                    Log.i(TAG, "STATE_CONNECTED");
                    //BluetoothDevice device = gatt.getDevice(); //Get device
                    gatt.discoverServices();
                    break;
                case BluetoothProfile.STATE_DISCONNECTED:
                    Log.e(TAG, "STATE_DISCONNECTED");
                    break;
                default:
                    Log.e(TAG, "STATE_OTHER");
            }
        }

        @Override
        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
            List<BluetoothGattService> services = gatt.getServices();
            Log.i(TAG, "Services: " + services.toString());

            BluetoothGattCharacteristic bpm = services.get(2).getCharacteristics().get(0);
            gatt.readCharacteristic(services.get(0).getCharacteristics().get(0));
        }

        @Override
        public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
            //my attempt to read and print characteristics
            byte[] charValue = characteristic.getValue();
            byte flag = charValue[0];
            Log.i(TAG, "Characteristic: " + flag);
            //gatt.disconnect();
        }
    };

InformationsquelleAutor eldivino87 | 2016-04-06