HC sr04 ultrasonic distance ranger module programming

Projects Programming
2

#include "Ultrasonic.h"
#include "Arduino.h"

Ultrasonic ultrasonic( 3, 4 );

int cm;

void setup() {
Serial.begin(9600);
}

void loop() {

int timing;
cm=ultrasonic.Ranging(CM);

if (cm>=300)
Serial.println("over 300cm");
else
{
Serial.print("distance: ");
Serial.print(cm);
Serial.println("cm");
}

delay(500);
}