Hello everyone,

First of all, im quite a (enthousiastic) beginner, so i might have done some stupid stuff. Excuse me in advance... and thanks for showing/explaining me the way.

Im trying to send and array corresponding to some audio spectrum bar values, in order to transfer it to 3D geometry in Grasshopper, a Rhino plug in, using the Udp library from S.Cousot.

Im trying to do that with 4 bars.
This is what i wrote (just focuse on the draw part, the rest is about setting up the spectrum). My problem is that i get a null pointer everytime i let the "udps.send(message, ip, port);" run...
everything else looks just fine to me... obviously its not. Thanks for helping me out.
it goes :



import krister.Ess.*;
import hypermedia.net.*; // import the UDP library
UDP udps;  // define the UDP object

FFT myfft;
AudioInput myinput;
int bufferSize=4; // number of bars

void setup() {
 size(200,300);
 frameRate(30);
 Ess.start(this);
 myinput=new AudioInput(bufferSize);
 myfft=new FFT(bufferSize*2);
 myinput.start();
 myfft.damp(.3);
 myfft.equalizer(true);
 myfft.limits(.005,.05);
}

void draw() {
 background(255);
 String message  = "";
 String ip       = "127.0.0.1";      // the remote IP address
 int port        = 6400;            // the destination port

 for (int i=0; i<bufferSize;i++) {
   rect(((i)*5)+20,250,3,myfft.spectrum[i]*-300);

   int data = ceil(myfft.spectrum[i]*500);

   if (i>0){
     message  = "a" + String.valueOf(i)+"="+String.valueOf(data);
     println (message);
     udps.send(message, ip, port); // here comes trouble
   }
 }
}
// close input
public void audioInputData(AudioInput theInput) {
 myfft.getSpectrum(myinput);
}