EXP 2. Find the obstacle distance using Arduino

 

 

int trigPin = 8; 

int echoPin =7; 

void setup()

{

Serial.begin(9600); 

pinMode(trigPin, OUTPUT);

 pinMode(echoPin, INPUT); 

}

 

void loop()

{

long duration, distance; 

digitalWrite(trigPin, LOW); 

delayMicroseconds(2); 

digitalWrite(trigPin, HIGH);

 delayMicroseconds(10);

 digitalWrite(trigPin, LOW); 

duration = pulseIn(echoPin, HIGH); 

distance = (duration/2) / 29.1; 

Serial.println(distance); 

}