#define TRIG_PIN 7
#define ECHO_PIN 6
long duration;
float distance;
void setup() {
Serial.begin(9600);
pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
}
void loop() {
// Clear the trig pin
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds(2);
// Send 10µs pulse to trigger
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
// Read the echo time
duration = pulseIn(ECHO_PIN, HIGH);
// Calculate distance in cm
distance = (duration / 2.0) * 0.0343;
// Print result
Serial.print("Distance: ");
Serial.print(distance);
Serial.println(" cm");
delay(500);
}