Leong Kum Loong (NYP) / HCSR04

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   Utrasonic_Example

HCSR04.h

Committer:
reesey
Date:
2017-12-04
Revision:
2:c9ffa237213b
Parent:
0:3373f4da46c1

File content as of revision 2:c9ffa237213b:

/*
    HCSR04.h
    Written by Leong Kum Loong.
    04 Dec 2017, REV. 0
    
    All routines and functions in this library are written by me solely.
    Library for HC-SR04 Ultrasonic Ranging sensor.
    Library uses pins p21 to send pulse to sensor Trigger input & p22 to read sensor Echo output.
    This is assuming velocity of sound rate from ultrasonic pulse is 340m/s.
*/

#ifndef HCSR04_h
#define HCSR04_h
#include "mbed.h"

//1 for CM & 2 for INCH
void getDistance(int unit=1);

//Read current distance.
float readDistance();

#endif