Hello Everybody, Currently I am working on my diploma thesis, which is to provide an auxiliary vector for a WLAN based RTLS (Real-time locating system). Because it has flaws in it, that come from losing IP packets, I have to construct an auxiliary system to it based on vectors. I am wondering if you could help me a bit. I use GlovePIE to acquire the accelerometer data from Wiimote which has the ADXL330 accelerometer unit built in it. We presume that the device is fixed in one of the 3 axis. So that we would like to use it like an indoor locating system on room level, we only need the two dimensions(forward/backward, right/left). My question is do you know a method of getting the brief trajectory of the wiimote in 2D. I know about a response to this on the link below: http://www.wiimoteproject.com/wiimo...projects/accelerometer-study/msg8742/#msg8742 But could you advise me how to process those acceleration data (?some transformation or filtering?) to get an auxiliary vector, it does not have to be very precise. Besides I am using the RelAcc parameters to determine the velocity, but it does not provide correct information. Because of this if I want to calculate position, I integrate again and it shows me totally wrong data.