aveaqim:
I need to put serial print to determine when motion starts and ends? So it is most probably then sensor and not the coding right? I'm gonna give it a shot and we'll see how it goes..thanks guy
Yes, with the serial print, you can see when motion starts and stops. Or you can do the same thing with an additional LED so you can look at it instead of the computer screen. Your preference. Let us know how it goes.