Issue with FIT File Replay and Accelerometer Units in Simulator

Rick 6 days ago

I’m working on some code to interpret gestures using accelerometer data. To aid in testing and debugging, I captured some accelerometer data using SensorLogging into a FIT file and set it up for replay in the simulator.

The accelerometer data is written out in milli-g’s. However, when replaying the FIT file in the simulator, it seems the data is being interpreted as G’s instead of milli-g’s. This results in values that are 1000 times larger than expected.

Have I missed a step in the FIT file creation process, or could this be a bug in how the simulator handles replay data?

Any insights, suggestions, or confirmations would be greatly appreciated.

0 flocsy🤠 6 days ago

I don't know, but some code would maybe help.

0 Rick 6 days ago in reply to flocsy🤠

Here's the example code where I setup the sensor logger and activity recording.

    private function setupLogger() {
        var loggerOptions = { :enableAccelerometer => true,
                        :enableGyroscope => true,
                        :enablMagnetometer => true,
                      };

        self.logger = new SensorLogging.SensorLogger(loggerOptions);

        var sessionOptions = { :name => "Gesture Recognition",
                               :sport => Activity.SPORT_SHOOTING,
                               :sensorLogger => logger,
                             };
        session =  ActivityRecording.createSession(sessionOptions);
    }

0 flocsy🤠 5 days ago in reply to Rick

Ahhhh, good that I asked. For some reason I thought it's you who is recording using setData...

So I guess this is a simulator bug.