Hi there

So im trying to trigger a LED plugged into the arduino through processing to fade in. I am planning to use Max to trgger processing and inturn want processing to send the arduino a fade in so bytes from 0 - 255? I am really not sure whether im doing the right thing at all. I have max to processing to arduino to trigger but i cant seem to get it to fade in and then stop? Here is my code so far:

PROCESSING SKETCH

import oscP5.*;
import netP5.*;
import processing.serial.*;

Serial port;
OscP5 oscP5;
NetAddress myBroadcastLocation;

float tempValue = 0;
void setup()
{
 size(256, 150);
 frameRate(30);

 println("Available serial ports:");
 println(Serial.list());
   oscP5 = new OscP5(this,12000);

 // Uses the first port in this list (number 0).  Change this to
 // select the port corresponding to your Arduino board.  The last
 // parameter (e.g. 9600) is the speed of the communication.  It
 // has to correspond to the value passed to Serial.begin() in your
 // Arduino sketch.
 port = new Serial(this, Serial.list()[0], 9600);  
 
myBroadcastLocation = new NetAddress("127.0.0.1",12000);


}

void draw()
{
 byte val;

    if(tempValue > 40.0 && tempValue < 41.2) // trigger from MAX/MSP
 {
   for(val = 0 ; val <= 255; val+=1) // fade in???
 
  port.write(val);  

delay(30);

     
}
}

/* incoming osc message are forwarded to the oscEvent method. */
void oscEvent(OscMessage theOscMessage) {
 /* get and print the address pattern and the typetag of the received OscMessage */
 println("### received an osc message with addrpattern "+theOscMessage.addrPattern()+" and typetag "+theOscMessage.typetag());
 theOscMessage.print();

 /*****************/
//create temp value by extracting the float value from the oscMessage//
 tempValue =  theOscMessage.get(0).floatValue();
 println(tempValue);

 /*****************/


ARDUINO SKETCH

int ledPin = 9;

void setup()
{
 // begin the serial communication
 Serial.begin(9600);
 pinMode(ledPin, OUTPUT);
}

void loop()
{
 byte val;

 // check if data has been sent from the computer
 if (Serial.available()) {
   // read the most recent byte (which will be from 0 to 255)
   val = Serial.read();
   // set the brightness of the LED
   analogWrite(ledPin, val);
 }
}

Sorry if this has been posted before couldn't find anything about it:

Thanks