Using RxAndroidBle, how do I subscribe to responses from writing to a characteristic?

Question

The BLE device that I\'m connecting to emits bytes on one of its GATT characteristics in response to writes to the characteristic. Clients are supposed to enable notificatio

Answer 1

For those readers not using a Java version that supports lambdas, here's my implementation of @s_noopy's answer.

connectionObservable
    .flatMap(new Func1>>() {
            @Override
            public Observable> call(RxBleConnection connection) {
                return connection.setupNotification(AP_SCAN_DATA);
            }             
        }, new Func2, Observable>() {
            @Override
            public Observable call(RxBleConnection connection, Observable apScanDataNotificationObservable) {
                return Observable.combineLatest(
                    connection.writeCharacteristic(AP_SCAN_DATA, CharacteristicValue.RESET.asBytes()),
                    apScanDataNotificationObservable.first(),
                    new Func2() {
                        @Override
                        public byte[] call(byte[] writtenBytes, byte[] responseBytes) {
                                    return responseBytes;
                                }
                            }
                        );
                    }
                }
            ).flatMap(new Func1, Observable>() {
                @Override
                public Observable call(Observable observable) {
                    return observable;
                }
            })
            .first()
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(new Action1() {
                @Override
                public void call(byte[] bytes) {
                    Log.i(TAG, "notification response...." + HexString.bytesToHex(bytes));
                }
            }, new Action1() {
                @Override
                public void call(Throwable throwable) {
                    logError(throwable);
                }
            });