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code for interfacing with ultrasonic sensor #6

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code for interfacing with ultrasonic sensor #6

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28 changes: 28 additions & 0 deletions ultrsonic_sensor.ino
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Original file line number Diff line number Diff line change
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# define trigPin 9
#define echoPin 10
long duration;
float distance;

void setup ()
{
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);

Serial.begin (9600); // Initiates serial communication at 9600 baud
}

void loop ()
{
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);//reading time taken for sound to come back to the source from echo pin
// Calculating the distance
distance = duration * 340.00/(1000 * 2);//considering speed of sound in air 340 m/s which changes with temperature
Serial.print("distance");
Serial.print(" ");
Serial.println(distance);
delay (200); // Delay of 200ms
}