How do we return data from sensor readings?

c625v12 · February 2019

public static void gyroscope(MetaWearBoard metaWearBoard) {

    final GyroBmi160 gyroBmi160 = metaWearBoard.getModule(GyroBmi160.class);
    gyroBmi160.configure()
            .odr(GyroBmi160.OutputDataRate.ODR_3200_HZ)
            .range(GyroBmi160.Range.FSR_2000)
            .commit();
    '''gyroBmi160.angularVelocity().addRouteAsync(source ->
            source.stream((Subscriber) (data, env) ->
            {
                Log.i("Gyro", data.value(AngularVelocity.class).toString());
            })).continueWith((Continuation<Route, Void>) task -> {
        gyroBmi160.angularVelocity();
        gyroBmi160.start();
        return null;
    });'''

}

How can i return the '''data.value(AngularVelocity.class).toString())''' back to an object? We want to put it into an sqllite database but I am not sure how to store it. Any suggestions?

Eric · February 2019

Don't convert the object to a string.

c625v12 · February 2019

Ok so i found the downloadasync method. I was wondering how I use it. Here is my code
view.findViewById(R.id.temp_start).setOnClickListener(new View.OnClickListener() {

'''@Override
        public void onClick(View v) {

            final Logging logging = metawear.getModule(Logging.class);

            logging.start(true);

            MbientSensors.temperature(metawear);

            logging.stop();


                 // download log data and send 100 progress updates during the download
                    logging.downloadAsync(100, new Logging.LogDownloadUpdateHandler() {
                        @Override
                        public void receivedUpdate(long nEntriesLeft, long totalEntries) {
                            Log.i("MainActivity", "Progress Update = " + nEntriesLeft + "/" + totalEntries);
                        }
                    }).continueWithTask(new Continuation<Void, Task<Void>>() {
                        @Override
                        public Task<Void> then(Task<Void> task) throws Exception {
                            Log.i("MainActivity", "Download completed");
                            System.out.println(task.isCompleted());
                            System.out.println(task);
                            task.getResult();

                            return task;
                        }

                    });'''

When I try to do anything I either get null or bolts.task. I was wondering how to parse it or make it into something usable. What is your suggestion?

Thanks

Eric · February 2019

Again, wrap your code with backticks (```) and edit your post if it the text does not render correctly.

I'm confused as to what you are asking now. First, you use code for streaming, now you are bringing logging code. Which one are you using?

c625v12 · February 2019

Well i am trying to find the easiest way to download the data from the sensor and put it into a database. I am not sure how to get the data and put it there. I'm sorry about 2 different code blocks. My question would be how can i use the data from the logger after it is downloaded? I know it is put into a task object. How can I access the data in that task object?

Eric · February 2019

Data handling is setup with routes:
https://mbientlab.com/androiddocs/3/data_route.html#handling-data

The sample code prints it to Logcat, so adapt it to do what you want to do with the data.

How do we return data from sensor readings?

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