RxAndroidBle how to do write to ble device correctly?

Question

Hi i am trying to build my first app with RxJava and BLE and i have a question: I made a wite(byte b) method in singletone class(that i use for connection, notifications, etc..). So now if i want to write data to BLE device i call this method. I need to do this a lot from different parts of code. I am very new to RxJava concept, and i feel like i am doing wrong. Current solution:

public void write(byte[] b) {

        if (isConnected()) {
            connectionObservable
                    .flatMap(rxBleConnection -> rxBleConnection.writeCharacteristic(characteristicUuid, b))
                    .subscribe(bytes -> {
                        onWriteSuccess(bytes);
                    }, this::onWriteFailure);
        }

    }

I feel like i need to do something like that, but i dont know how:

 protected static final BlockingQueue<byte[]> TxQueue = new ArrayBlockingQueue<>(32);

 public void write(byte[] b) {

       TxQueue.add(bytes);

    }

And call this only once during connection to device:

connectionObservable
                    .flatMap(rxBleConnection ->     rxBleConnection.writeCharacteristic(characteristicUuid, TxQueue.take))
                    .subscribe(bytes -> {
                        onWriteSuccess(bytes);
                    }, this::onWriteFailure);

Thanks for an answer!

I am not very good with Rx Concept. So before i used queue in android service to add all data to it, and while(true) loop to take the data from this queue to send — , Aug 25 '16 at 14:56

score 0 · Answer 1 · edited May 23 '17 at 11:51

0

Your first solution will work just fine.

The RxAndroidBle library is handling queueing of the commands for you so the only thing you need to do is to subscribe() to RxBleConnection.writeCharacteristic().

There is also similar questions already on Stackoverflow: RxAndroidBle keeping a persistant connection + Write/Notification handling

Best Regards

edited May 23 '17 at 11:51

Community

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answered Aug 25 '16 at 15:09

Dariusz Seweryn

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RxAndroidBle how to do write to ble device correctly?

1 Answers1