Based on empirical study. The G1 takes about 4 force measurements per second. I have notice that simply using the change in force that happens when one walks is not enough to get an accurate step reading. So, we've being working on using the sway in direction that happens when we walk in addition to the magnitude. We are using all 3 axis that are reported by the gravity sensor. This information is used to create vectors and are visualized with visual python. Below is a picture of me walking
The color code is to show how good the algorithm is at getting the steps counted. We are converting the algorithm from python to Java this week. Then we'll do more testing. The Android Activity will be available soon under GPL Licensing.
