Processing to Arduino degree change

hen

Hi, So my problem I think is quite simple, I am trying to communicate a degree change from a piece of colour tracking to arduino. At the moment I get information from processing to arduino but it is scrambled and incorrect. Basically tempAngle is my change in angles and I want arduino to read it in the serial monitor.

Arduino Code: int incomingByte = 0; // for incoming serial data

void setup() {
        Serial.begin(9600);     // opens serial port, sets data rate to 9600 bps
}

void loop() {

        // send data only when you receive data:
        //if (Serial.available() > 0) {
                // read the incoming byte:
                incomingByte = Serial.read();

                // say what you got:
                print("I received: ");
                println(incomingByte, DEC);
        //}
}

Processing Code:

 if ((bigX<320)&&(bigY<240)) {   //Square 1
        tempX = 320-bigX;
        tempY = 240-bigY;

        currentAngle = (180 + (90-(degrees (atan(tempX/tempY)))));

        println("SQ1");

        //ARM
        stroke(0, 0, 0);
        strokeWeight(5);
        pushMatrix();
        translate(width/2, height/2);
        //rotate(radians(180));
        rotate(radians(currentAngle));
        line(0, 0, 150, 0);

        println("rotation:" + currentAngle);

        tempAngle = (currentAngle - previousAngle);

        myPort.write(int(tempAngle));

        println("difference is: " + tempAngle);

        previousAngle = currentAngle;

        popMatrix();
      }

Thanks for taking a look.

hen

Also I don't get negative readings, which I need

zumbaree

your question doesn't seem complete. by degree do you mean temperature from a temperature sensor? you ommited part of your processing code that gets information from arduino, and you ommited arduino code that gets data from sensor and sends it back (it seems to just send back echo of what it receives from the serial port)