Air Defense System with Radar

#include <Servo.h>

const int trigPin = 9;
const int echoPin = 10;
const int buzzer = 11;
const int motorPin = 12; 
const int servoPin = 6;

Servo myServo;
long duration;
int distance;

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(motorPin, OUTPUT);
  
  myServo.attach(servoPin);
  Serial.begin(9600); // Communication speed
}

void loop() {
  // Scan from 10 to 170 degrees
  for(int i=10; i<=170; i++){  
    myServo.write(i);
    delay(30); 
    calculateDistance(i); 
  }
  
  // Scan back from 170 to 10 degrees
  for(int i=170; i>=10; i--){  
    myServo.write(i);
    delay(30);
    calculateDistance(i);
  }
}

void calculateDistance(int angle) {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;

  // Send data to Processing in format: "angle,distance."
  Serial.print(angle);
  Serial.print(",");
  Serial.print(distance);
  Serial.print("."); 

  // Physical Alert Logic
  if (distance > 0 && distance <= 50) {
    digitalWrite(buzzer, HIGH);
    digitalWrite(motorPin, HIGH);
  } else {
    digitalWrite(buzzer, LOW);
    digitalWrite(motorPin, LOW);
  }
}

import processing.serial.*; 

Serial myPort; 
String data = "";
float iAngle, iDistance;
int index1 = 0;

void setup() {
  size(1200, 700); // Adjust to your screen size
  smooth();
  
  // NOTE: If you get an error, change [0] to [1] or [2] 
  // to match the COM port your Arduino is plugged into.
  String portName = Serial.list()[0]; 
  myPort = new Serial(this, portName, 9600);
  myPort.bufferUntil('.'); // Stops reading at the dot sent by Arduino
}

void draw() {
  fill(0, 15); // This creates the "fade" effect for the sweep
  noStroke();
  rect(0, 0, width, height - height*0.065); 
  
  drawRadar(); 
  drawLine();
  drawObject();
  drawText();
}

void serialEvent (Serial myPort) { 
  data = myPort.readStringUntil('.');
  data = data.substring(0, data.length()-1); // Remove the dot
  
  index1 = data.indexOf(","); 
  if (index1 > -1) {
    iAngle = float(data.substring(0, index1)); 
    iDistance = float(data.substring(index1 + 1, data.length())); 
  }
}

void drawRadar() {
  pushMatrix();
  translate(width/2, height - height*0.074); 
  noFill();
  strokeWeight(2);
  stroke(98, 245, 31);
  // Drawing the concentric semi-circles
  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);
  // Drawing the angle lines
  line(-width/2, 0, width/2, 0);
  for (int i=30; i<=150; i+=30) {
    line(0,0, (-width/2)*cos(radians(i)), (-width/2)*sin(radians(i)));
  }
  popMatrix();
}

void drawObject() {
  pushMatrix();
  translate(width/2, height - height*0.074); 
  strokeWeight(9);
  stroke(255, 10, 10); // Red color for detected threats
  
  // Map the distance to pixels (scale of 50cm max)
  float pixsDistance = iDistance * ((height - height * 0.1666) * 0.025); 
  
  if (iDistance < 50 && iDistance > 0) {
    // Draws a line at the specific angle where object is detected
    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); // Bright green sweep line
  translate(width/2, height - height*0.074); 
  line(0, 0, (height - height*0.12)*cos(radians(iAngle)), -(height - height*0.12)*sin(radians(iAngle))); 
  popMatrix();
}
 
void drawText() { 
  pushMatrix();
  fill(0);
  noStroke();
  rect(0, height - height*0.0648, width, height);
  fill(98, 245, 31);
  textSize(25);
  text("Status: " + (iDistance < 50 && iDistance > 0 ? "THREAT DETECTED" : "CLEAR"), width*0.05, height-height*0.027);
  text("Angle: " + int(iAngle) + "°", width*0.45, height-height*0.027);
  text("Distance: " + int(iDistance) + " cm", width*0.75, height-height*0.027);
  popMatrix();
}