Measuring distance is a important component of this project. I am finding graphing the data in Freeboard is an excellent check to see if my calculations make sense. I have calculated the dynamic threshold and now will compare the second data to the first. I have used a node that delays the second flow by 1 second. Abit tricky but here is the initial graph. What I want is to determine if :

A step is defined as happening if there is a negative slope

of the acceleration plot (Flow2 < Flow1 ) when the

acceleration curve crosses below the dynamic threshold. I split the flow threshold into two flows. On Flow 2 I added a delay function to compare the first data to the second data coming in.

var delay=1000; //1 second
setTimeout(function() {  //your code to be executed after 1 second}, delay);
return msg;