HCSR04 Class Reference

class for the ultrasonic ranging module HC-SR04 More...

#include <hc_sr04.h>

Collaboration diagram for HCSR04:

Public Member Functions
	HCSR04 (uint trig_pin, uint echo_pin)
	Construct a new hc sr04 object.
float	get_distance ()
	request a measure from HCSR04

Private Member Functions
void	trig ()
	send a trig signal to HCSR04

Private Attributes
uint	trig_pin
	the GPIO pin that send trigger signal to the HC-SR04 module
uint	echo_pin
	the GPIO pin where the HC-SR04 return echo signal

Detailed Description

class for the ultrasonic ranging module HC-SR04

Constructor & Destructor Documentation

HCSR04()

HCSR04::HCSR04	(	uint	trig_pin,
		uint	echo_pin )

Construct a new hc sr04 object.

Parameters

trig_pin	the pin attached to the triggering signal
echo_pin	the pin used to measure round-trip time of ultrasonic pulses

Member Function Documentation

get_distance()

float HCSR04::get_distance

(

)

request a measure from HCSR04

Returns

the measured distance in float[cm]. Max = 400cm. If no response, return = -1.

Here is the call graph for this function:

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The documentation for this class was generated from the following files:

• hc_sr04.h
• hc_sr04.cpp