Kalman Filters are great and all, but I find the Complementary Filter much easier to implement with similar results. The best articles that I have found for coding a Complementary Filter are this wiki (along with this article about converting sensors to Engineering units) and a PDF in the zip file on this page (Under … Read more
This is a common problem with yaw, pitch and roll. You cannot get rid of it as long as you are using yaw, pitch and roll (Euler angles). This video explains why. I use rotation matrices instead of Euler angles in my motion sensing application. For an introduction to rotation matrices I recommend: Direction Cosine … Read more
You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice. Here is an explanation why (Google Tech Talk) at 23:20. I highly recommend this video. It is not the accelerometer noise that causes the problem but the gyro white noise, see subsection 6.2.3 Propagation of Errors. … Read more
Here is an example code. Put this into your activity class: /* put this into your activity class */ private SensorManager mSensorManager; private float mAccel; // acceleration apart from gravity private float mAccelCurrent; // current acceleration including gravity private float mAccelLast; // last acceleration including gravity private final SensorEventListener mSensorListener = new SensorEventListener() { public … Read more
In 3.0, there’s now an easier way – hook into the new motion events. The main trick is that you need to have some UIView (not UIViewController) that you want as firstResponder to receive the shake event messages. Here’s the code that you can use in any UIView to get shake events: @implementation ShakingView – … Read more
Your question as asked is much too broad for this site. With that said, here’s how I implemented a solution: Create a node.js server. You will want to be able to serve up html pages. Add socket capability. Generate a webpage for the mobile device. The webpage will use the device orientation API to determine … Read more