Project tutorial

Arduino Based Security System © GPL3+

Do you want to build an easy security system? Well this is the perfect tutorial for you!

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Components and supplies

Necessary tools and machines

Knife

Apps and online services

About this project

Introduction

This project is a Arduino Based Security System consisting of a Arduino Uno, a servo motor, a ultrasonic sensor and a piezoelectric buzzer.

Here, the ultrasonic sensor senses an object that is within its range, which activates the buzzer. This sensor data is also fed into a Processing IDE software, which creates a graphical map.

The servo motor is used to rotate the ultrasonic sensor so as to cover a large area.

This is a pretty simple project and can be done within an hour.

Here is the procedure for the project -

  • Connect the Trigger Pin of the Sensor to Pin 2 of the Arduino
  • Connect the Echo Pin of the Sensor to Pin 3 of the Arduino
  • Connect Vcc and GND of the Sensor Supply and Ground respectively
  • Place the buzzer on the breadboard
  • Connect its Positive End to Pin 10 of the Arduino and connect the Negative End to ground
  • Attach the black and red wire of the servo motor to ground and supply respectively
  • Attach the yellow wire of the servo motor to Pin 9 of the Arduino
  • Connect 5V terminal of the Arduino to supply and GND terminal of the Arduino to ground

After Finishing these connections, place the entire circuit inside the box as shown in the figure.

Then it's time to code.

Code

Security System_IDEC9Search
#include <Servo.h>. 
int tPin = 2;
int ePin = 3;
int buz = 10;
int d1,d2;
int i =0;
int sdistance;
Servo myServo; 
void setup() {
  Serial.begin(9600);
  pinMode(tPin, OUTPUT); 
  pinMode(ePin, INPUT); 
  pinMode(buz,OUTPUT);
  myServo.attach(9); 
}
void loop() {
  for(i=0;i<=180;i += 10)
  {  
  myServo.write(i);
  delay(30);
  d2 = calculateDistance();
  
  Serial.print(i); 
  Serial.print(","); 
  Serial.print(d2); 
  Serial.print(".");
  }
 
  for(i=180;i>0; i-=10){  
  myServo.write(i);
  delay(30);
  d2 = calculateDistance();
  Serial.print(i);
  Serial.print(",");
  Serial.print(d2);
  Serial.print(".");
  }
}
int calculateDistance(){ 
  
  digitalWrite(tPin,HIGH); 
  delay(1000);
  digitalWrite(tPin, LOW);
  d1 = pulseIn(ePin, HIGH); 
  d2 = d1 * 0.0171821306;
  if (d2 < 10)
    {
      digitalWrite(buz,HIGH);
             
    }
    else
    {
      digitalWrite(buz,LOW);
            }
     return d2;
  
 
}
ProcessingJava
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 (1366, 768); // ***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.
}
void draw() {
  
  fill(98,245,31);
  // 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 = int(angle);
  iDistance = int(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<10){
    // 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>10) {
  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("2cm",width-width*0.3854,height-height*0.0833);
  text("4cm",width-width*0.281,height-height*0.0833);
  text("6cm",width-width*0.177,height-height*0.0833);
  text("10cm",width-width*0.0729,height-height*0.0833);
  textSize(40);
  text("Akshay6766 ", width-width*0.875, height-height*0.0277);
  text("Angle: " + iAngle +" ", width-width*0.48, height-height*0.0277);
  text("Distance: ", 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(); 
}

Schematics

ultrasonic_with_buzzer_bb_K21QkUrwkn.png
Ultrasonic with buzzer bb k21qkurwkn

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