Freenove ESP32 User Manual

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109
Chapter 10 Ultrasonic Ranging
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The following is the code:
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#include "UltrasonicRanging.h"
void setup() {
Serial.begin(115200);
setupSonar();
}
void loop() {
float dist = getSonar();
Serial.printf("dist: %.2fcm\r\n", dist);
delay(500);
}
Initialize the pins of the ultrasonic module.
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setupSonar();
Get the data value of the ultrasonic module, the unit is cm.
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float dist = getSonar();
UltrasonicRanging.h
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#ifndef _ULTRASONICRANGING_h
#define _ULTRASONICRANGING_h
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#define PIN_TRIG 32 //Ultrasonic trig pin
#define PIN_ECHO 12 //Ultrasonic echo pin
void setupSonar();
float getSonar();
#endif

Freenove ESP32 Specifications

General

Brand	Freenove
Model	ESP32
Category	Computer Hardware
Language	English