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3.4 Coding

Steps to do coding in Arduino IDE

1. Open Arduino IDE.

Complete Code:

int trig=5; //initialization of trigger pin
int echo=6; //initialization of echo pin
//initialization of motors pin
int M1a=7;
int M1b=8;
int M2a=9;
int M2b=10;

//initialization of variable to calculate the distance
int duration=0;
long distance=0;

void setup() {
pinMode(trig,OUTPUT);
pinMode(echo,INPUT);
pinMode(M1a, OUTPUT);
pinMode(M1b, OUTPUT);
pinMode(M2a, OUTPUT);
pinMode(M2b, OUTPUT);

Serial.begin(9600);
}
void loop()
{
digitalWrite(5, LOW);
delayMicroseconds(2);
digitalWrite(5, HIGH);
delayMicroseconds(10);
digitalWrite(5, LOW);
delayMicroseconds(2);
duration= pulseIn(6,HIGH);
delay(100);
distance=duration*0.034/2;
Serial.println(distance);
if(distance<=25)
{
digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
delay(300);

digitalWrite(7, LOW);
digitalWrite(8, HIGH);
digitalWrite(9, LOW);
digitalWrite(10, HIGH);

delay(350);
digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
{

digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, HIGH);
delay(500);
}
}
else
{
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, HIGH);
digitalWrite(10, LOW);
}

}

Note: All lines written in “// ” are comments which will not run with the code that is just to understand the statements written in the code.