Processing doesn't respond to arduino

Question

First of all if I make a wrong sentence this is because my main language isn't english. I have a homework so i am trying to make a radar with Arduino IDE and Processing. I found and wrote the codes from internet but processing does not respond to ultrasonic sensor and i tought maybe it isn't detecting the serial port. Code from Processing:

import processing.serial.*; // imports library for serial communication
import java.awt.event.KeyEvent; // imports library for reading the data from the serial port
import java.io.IOException;
Serial myPort; // defines Object Serial
// defubes variables
String angle="";
String distance="";
String data="";
String noObject;
float pixsDistance;
int iAngle, iDistance;
int index1=0;
int index2=0;
PFont orcFont;
void setup() {
 
 size (1600, 900); // ***CHANGE THIS TO YOUR SCREEN RESOLUTION***
 smooth();
 myPort = new Serial(this,"COM3", 9600); // starts the serial communication
 myPort.bufferUntil('.'); // reads the data from the serial port up to the character '.'. So actually it reads this: angle,distance.
 orcFont = loadFont("Calibri-Bold-48.vlw");
}
void draw() {
 
 fill(98,245,31);
 textFont(orcFont);
 // simulating motion blur and slow fade of the moving line
 noStroke();
 fill(0,4); 
 rect(0, 0, width, height-height*0.065); 
 
 fill(98,245,31); // green color
 // calls the functions for drawing the radar
 drawRadar(); 
 drawLine();
 drawObject();
 drawText();
}
void serialEvent (Serial myPort) { // starts reading data from the Serial Port
 // reads the data from the Serial Port up to the character '.' and puts it into the String variable "data".
 data = myPort.readStringUntil('.');
 data = data.substring(0,data.length()-1);
 
 index1 = data.indexOf(","); // find the character ',' and puts it into the variable "index1"
 angle= data.substring(0, index1); // read the data from position "0" to position of the variable index1 or thats the value of the angle the Arduino Board sent into the Serial Port
 distance= data.substring(index1+1, data.length()); // read the data from position "index1" to the end of the data pr thats the value of the distance
 
 // converts the String variables into Integer
 iAngle = parseInt(angle);
 iDistance = parseInt(distance);
}
void drawRadar() {
 pushMatrix();
 translate(width/2,height-height*0.074); // moves the starting coordinats to new location
 noFill();
 strokeWeight(2);
 stroke(98,245,31);
 // draws the arc lines
 arc(0,0,(width-width*0.0625),(width-width*0.0625),PI,TWO_PI);
 arc(0,0,(width-width*0.27),(width-width*0.27),PI,TWO_PI);
 arc(0,0,(width-width*0.479),(width-width*0.479),PI,TWO_PI);
 arc(0,0,(width-width*0.687),(width-width*0.687),PI,TWO_PI);
 // draws the angle lines
 line(-width/2,0,width/2,0);
 line(0,0,(-width/2)*cos(radians(30)),(-width/2)*sin(radians(30)));
 line(0,0,(-width/2)*cos(radians(60)),(-width/2)*sin(radians(60)));
 line(0,0,(-width/2)*cos(radians(90)),(-width/2)*sin(radians(90)));
 line(0,0,(-width/2)*cos(radians(120)),(-width/2)*sin(radians(120)));
 line(0,0,(-width/2)*cos(radians(150)),(-width/2)*sin(radians(150)));
 line((-width/2)*cos(radians(30)),0,width/2,0);
 popMatrix();
}
void drawObject() {
 pushMatrix();
 translate(width/2,height-height*0.074); // moves the starting coordinats to new location
 strokeWeight(9);
 stroke(255,10,10); // red color
 pixsDistance = iDistance*((height-height*0.1666)*0.025); // covers the distance from the sensor from cm to pixels
 // limiting the range to 40 cms
 if(iDistance<40){
 // draws the object according to the angle and the distance
 line(pixsDistance*cos(radians(iAngle)),-pixsDistance*sin(radians(iAngle)),(width-width*0.505)*cos(radians(iAngle)),-(width-width*0.505)*sin(radians(iAngle)));
 }
 popMatrix();
}
void drawLine() {
 pushMatrix();
 strokeWeight(9);
 stroke(30,250,60);
 translate(width/2,height-height*0.074); // moves the starting coordinats to new location
 line(0,0,(height-height*0.12)*cos(radians(iAngle)),-(height-height*0.12)*sin(radians(iAngle))); // draws the line according to the angle
 popMatrix();
}
void drawText() { // draws the texts on the screen
 
 pushMatrix();
 if(iDistance>40) {
 noObject = "Out of Range";
 }
 else {
 noObject = "In Range";
 }
 fill(0,0,0);
 noStroke();
 rect(0, height-height*0.0648, width, height);
 fill(98,245,31);
 textSize(25);
 
 text("10cm",width-width*0.3854,height-height*0.0833);
 text("20cm",width-width*0.281,height-height*0.0833);
 text("30cm",width-width*0.177,height-height*0.0833);
 text("40cm",width-width*0.0729,height-height*0.0833);
 textSize(40);
 text("Obje: " + noObject, width-width*0.875, height-height*0.0277);
 text("Açı: " + iAngle +" °", width-width*0.48, height-height*0.0277);
 text("Mesafe: ", width-width*0.26, height-height*0.0277);
 if(iDistance<40) {
 text(" " + iDistance +" cm", width-width*0.225, height-height*0.0277);
 }
 textSize(25);
 fill(98,245,60);
 translate((width-width*0.4994)+width/2*cos(radians(30)),(height-height*0.0907)-width/2*sin(radians(30)));
 rotate(-radians(-60));
 text("30°",0,0);
 resetMatrix();
 translate((width-width*0.503)+width/2*cos(radians(60)),(height-height*0.0888)-width/2*sin(radians(60)));
 rotate(-radians(-30));
 text("60°",0,0);
 resetMatrix();
 translate((width-width*0.507)+width/2*cos(radians(90)),(height-height*0.0833)-width/2*sin(radians(90)));
 rotate(radians(0));
 text("90°",0,0);
 resetMatrix();
 translate(width-width*0.513+width/2*cos(radians(120)),(height-height*0.07129)-width/2*sin(radians(120)));
 rotate(radians(-30));
 text("120°",0,0);
 resetMatrix();
 translate((width-width*0.5104)+width/2*cos(radians(150)),(height-height*0.0574)-width/2*sin(radians(150)));
 rotate(radians(-60));
 text("150°",0,0);
 popMatrix(); 
}

Code from Arduino IDE:

#include <Servo.h> // servo motor kütüphanesi
#define trigPin 4 // ultrasonik sensör trig pini
#define echoPin 3 // ultrasonik sensör echo pini
Servo servoMotor; // servo motor nesnesi
int angle = 0; // servo motor açısı
long duration, distance; // ultrasonik sensör mesafesi
void setup() {
 Serial.begin(9600); // seri haberleşme hızı
 servoMotor.attach(9); // servo motor pin numarası
}
void loop() {
 for(angle = 0; angle < 180; angle += 10){ // servo motor açıları
 servoMotor.write(angle); // servo motoru hareket ettir
 delay(200); // bekleme süresi
 distance = getDistance(); // mesafe ölçümü
 Serial.print(angle); // açıyı yazdır
 Serial.print(",");
 Serial.println(distance); // mesafeyi yazdır
 }
}
long getDistance(){ // ultrasonik sensör mesafe ölçümü
 pinMode(trigPin, OUTPUT);
 digitalWrite(trigPin, LOW);
 delayMicroseconds(2);
 digitalWrite(trigPin, HIGH);
 delayMicroseconds(10);
 digitalWrite(trigPin, LOW);
 pinMode(echoPin, INPUT);
 duration = pulseIn(echoPin, HIGH);
 distance = duration / 58.2;
 return distance;
}

Thank you for the help!

• jsotola: the processing sketch is irrelevant here ... open the Arduino IDE serial monitor to determine if the correct data is being sent by the Arduino
• Earas: can you give me more details. Like i said i don't know english too much and i am new to arduino ide. And there is only the angle in the serial monitor

Answer 1

Your processing code is looking for something that ends in a '.'

Your arduino code is sending angle,distnace[new line]

So either change your processing code to look for '\n' (the new line character) rather than '.' or change your arduino code to add a . to the end:

Serial.print(angle); // açıyı yazdır
Serial.print(",");
Serial.print(distance); // mesafeyi yazdır
Serial.print(".");