Arduino Radar - Version 2.0 - Arduino Project Hub

Components and supplies

Arduino UNO

Ultrasonic Sensor - HC-SR04 (Generic)

servo motor

Jumper wires (generic)

Necessary tools and machines

3D Printer (generic)

Apps and online services

Arduino IDE

About this project

Arduino Radar Rotates for 150°.

It measures the distance from the object to ultrasonic sensor.

It displays the distance graphically on the screen.

If the object is close to the sensor, displays will draw red line.

If the object is far or if there is nothing in front of the sensor, the display will draw blue lines.

Processing (code):

Create Display

To create a display that shows the position of the object and distance, I have to draw on a gray background coordinate system quarters.

Function drawRadar(); draws white lines that represent the coordinate system.

This is translated with the center for 700px x and y axes.

Display Example

After switching on this function the display looks like this:

drawObject(); function draws a red line if the object is close to the sensor.

drawLine(); function draws a blue line if the object is far.

drawText(); function prints text on the screen.

Code

Arduino IDE codeArduino

Code for Arduino IDE

#include <Servo.h> 
Servo myServo; 
int trigPin = 10;
int echoPin = 11;
long duration;
int distance;

void setup() {
  Serial.begin(9600);
  myServo.attach(12); 
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 
}

void loop() {
 print_serial();
}
void print_serial(){
  for(int i=165;i>15;i--){  
  myServo.write(i);
  delay(30);
  distance = measures_the_distance();
  Serial.print(i);
  Serial.print(",");
  Serial.print(distance);
  Serial.print(".");
  }
  for(int i=15;i<=165;i++){  
  myServo.write(i);
  delay(30);
  distance = measures_the_distance();
  Serial.print(i); 
  Serial.print(","); 
  Serial.print(distance); 
  Serial.print("."); 
  }
}
int measures_the_distance(){ 
  digitalWrite(trigPin, LOW); 
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH); 
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH); 
  distance= duration*0.034/2;
  return distance;
}

Processing codeProcessing

code for Processing IDE

import processing.serial.*; 
import java.awt.event.KeyEvent; 
import java.io.IOException;
Serial myPort;
String angle="";
String distance="";
String data="";
String noObject;
float pixsDistance;
int iAngle, iDistance;
int index1=0;
int index2=0;
PFont orcFont;

void setup() {
 size (1900,1200);
 smooth();
 myPort = new Serial(this,"COM6", 9600); 
 myPort.bufferUntil('.'); 
}

void draw() {
  
  fill(98,245,31);
  noStroke();
  fill(0,4); 
  rect(0, 0, width, 1010); 
  
  drawRadar(); 
  drawLine();
  drawObject();
  drawText();
}

void serialEvent (Serial myPort) { 
  data = myPort.readStringUntil('.');
  data = data.substring(0,data.length()-1);
  
  index1 = data.indexOf(","); 
  angle= data.substring(0, index1);
  distance= data.substring(index1+1, data.length()); 
  
  iAngle = int(angle);
  iDistance = int(distance);
}

void drawRadar() {
  pushMatrix();
  translate(700,700); 
  noFill();
  strokeWeight(2);
  stroke(255,245,255);
  // draws the arc lines
  arc(0,0,1800,1800,PI,TWO_PI);
  arc(0,0,1400,1400,PI,TWO_PI);
  arc(0,0,1000,1000,PI,TWO_PI);
  arc(0,0,600,600,PI,TWO_PI);
 
  line(-960,0,960,0);
  line(0,0,-960*cos(radians(30)),-960*sin(radians(30)));
  line(0,0,-960*cos(radians(60)),-960*sin(radians(60)));
  line(0,0,-960*cos(radians(90)),-960*sin(radians(90)));
  line(0,0,-960*cos(radians(120)),-960*sin(radians(120)));
  line(0,0,-960*cos(radians(150)),-960*sin(radians(150)));
  line(-960*cos(radians(30)),0,960,0);
  popMatrix();
}
void drawObject() {
  pushMatrix();
  translate(700,700);
  strokeWeight(9);
  stroke(255,0,0); 
  pixsDistance = iDistance*22.5;
  if(iDistance<40)
     line(pixsDistance*cos(radians(iAngle)),-pixsDistance*sin(radians(iAngle)),950*cos(radians(iAngle)),-950*sin(radians(iAngle)));
  popMatrix();
}
void drawLine() {
  pushMatrix();
  strokeWeight(9);
  stroke(30,10,250);
  translate(700,700); 
  line(0,0,950*cos(radians(iAngle)),-950*sin(radians(iAngle))); 
  popMatrix();
}

void drawText() {
  
  pushMatrix();
  fill(0,0,0);
  noStroke();
  rect(0, 1010, width, 600);
  textSize(25);
  fill(255,255,255);
  translate(800,650);
  rotate(-radians(-60));
  text("30°",0,0);
  resetMatrix();
  translate(740,600);
  rotate(-radians(-30));
  text("60°",0,0);
  resetMatrix();
  translate(680,590);
  rotate(radians(0));
  text("90°",0,0);
  resetMatrix();
  translate(620,620);
  rotate(radians(-30));
  text("120°",0,0);
  resetMatrix();
  translate(590,680);
  rotate(radians(-60));
  text("150°",0,0);
resetMatrix();
  translate(50,650);
  rotate(radians(0));
  fill(5,0,0);
  text("PoliArdo team Serbia",2,5);
    fill(255,255,255);
  text("PoliArdo team Serbia",0,0);
  popMatrix(); 
}