clearLog() seems to be not working

enuff

Dear mbientLab team,

I use Android SDK 3.4.0 and fw 1.3.7.

i want the log to be cleared the first time I connect to a MetaWear R. To do so I call this method:

private void clearLog() {

    if(logging != null) {
        logging.clearEntries();

        board.disconnectAsync().onSuccess(task -> {
            Log.i(getId(), "Log cleared!");
            loggingCleared = true;
            setState(SensorState.DISCONNECTED);
            return null;
        });
    }
    else {
        Log.w(getId(), "Try to call clearLog on null Logging module!");
    }
}

in this fashion:

board.connectAsync()
.onSuccess(task -> {
if(! loggingCleared) {
clearLog();
return Task.cancelled();
}
else {
return task;
}
})

However, the log is not empty when I start downloading.

Eric

Add a delay after calling clearEntries. Looking at the Logging interface again, that function should be an asynchronous task.

You also don't need to disconnect anymore.

wko27

@Eric how long should that delay be approximately? 1 second? 5 seconds?

There's no way to check the size of the log entries without downloading the data, right? I can open a separate
thread, but I'm running into issues where I start the logger, stop it after ~90 seconds, then configure routes to stream logged data. Various outcomes of the download include:

1. download doesn't find any entries in the log
2. download receives exactly 1 entry out of 1 entry
3. data is downloaded but contains a few seconds of data (~12) instead of the full ~90 seconds I requested
4. data is logged, but only shows data for accelerometer and gyroscope streams (set to 400 hz), not for battery life (which uses a timer task triggering every 30 seconds)

Eric

@wko27

5 seconds should suffice.
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