Autonomous Bot

An Arduino-based rover that is capable of sensing its environment and navigating without human input.

BeginnerWork in progress2.5 hours2,201

Things used in this project

Hardware components

Arduino UNO

Jumper wires (generic)

DC motor (generic)

SparkFun Dual H-Bridge motor drivers L298

Breadboard (generic)

9V battery (generic)

Software apps and online services

Arduino IDE

Story

It's a self-driving rover that is capable of sensing its environment via sensors and navigating itself without any interruption.

Index

Introduction

Build a Rover

Code Execution

Introduction

Our end product is a rover that navigate by itself. Setting up the rover with sensors and we finally concluded by executing the code.

Build the Rover

Have any basic framework, any hard material box would do the job, we scrapped some material we had in our college to have our basic framework, after setting up a basic box structure fit wheels and DC motor on both sides of the box, use a ball bearing for the front wheel.

Mount the Arduino and add a battery in it for supply, and four IR sensor are fixed in four side of the rover, for more accuracy you use UV sensor also.

Connect the H-bridge motor driver with motor.

Connect the four sensor and the bridge board to the arduino and upload the code in Arduino.

Code

int r1=13;
int r2=3;
int r3=4;
int r4=7;
int IR1,IR2,IR3,IR4;
int leftmotor1=5;
int leftmotor2=6;
int rightmotor1=10;
int rightmotor2=11;



void setup() 
{
   Serial.begin(9600);
   pinMode(leftmotor1,OUTPUT);
   pinMode(leftmotor2,OUTPUT);
   pinMode(rightmotor1,OUTPUT);
   pinMode(rightmotor2,OUTPUT);
   
   pinMode(IR1,INPUT);
   pinMode(IR2,INPUT);
   pinMode(IR3,INPUT);
   pinMode(IR4,INPUT);                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
}

void loop() 
{   
  IR1=digitalRead(r1);
  IR2=digitalRead(r2);
  IR3=digitalRead(r3);
  IR4=digitalRead(r4);
    if ((IR1!=1)&&(IR2!=1)&&(IR3!=1))
   {
     motforward();
   }
  else if(((IR1,IR2,IR3)==1)&&((IR4)!=1))
   {
      motstop();
      delay(1000);
      motbackward();
      delay(2000);
   }
   else if(((IR3,IR1)==1)&&((IR2,IR4)!=1))
   {
      motstop();
      delay(1000);
      motright();
      delay(1000);
      
   }
   else if(((IR2,IR1)==1)&&((IR3,IR4)!=1))
   {
    motstop();
    delay(1000);
    motleft();
    delay(1000);
      
   }
   else if((IR1==1)&&(IR2==1)&&(IR3==1)&&(IR4==1))
   {
      motstop();
   }
   else if (IR4==1)
   {
    motstop();
   }
}
   void motforward()
   {
      digitalWrite(leftmotor1,HIGH);
      digitalWrite(leftmotor2,LOW);
      digitalWrite(rightmotor1,HIGH);
      digitalWrite(rightmotor2,LOW);
    
   }
  void motbackward()
   {

      digitalWrite(leftmotor1,LOW);
      digitalWrite(leftmotor2,HIGH);
      digitalWrite(rightmotor1,LOW);
      digitalWrite(rightmotor2,HIGH);
   }
   void motleft()
   {
      digitalWrite(leftmotor1,LOW);
      digitalWrite(leftmotor2,HIGH);
      digitalWrite(rightmotor1,LOW);
      digitalWrite(rightmotor2,LOW);
   }
   void motright()
   {
      digitalWrite(leftmotor1,LOW);
      digitalWrite(leftmotor2,LOW);
      digitalWrite(rightmotor1,LOW);
      digitalWrite(rightmotor2,HIGH);
   }
   void motstop()
   {
      digitalWrite(leftmotor1,LOW);
      digitalWrite(leftmotor2,LOW);
      digitalWrite(rightmotor1,LOW);
      digitalWrite(rightmotor2,LOW);
   }