Freenove ESP32 - Page 96

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94
Chapter 8 Buzzer
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The following is the code:
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void setup() {
setupBuzzer();
for (int i = 0; i < 3; i++) {
setBuzzer(1000);
delay(100);
setBuzzer(0);
delay(100);
}
delay(3000);
setMelodyToPlay(MELODY_POWER_UP);
}
void loop() {
delay(1000);
}
Initialize the buzzer pin.
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setupBuzzer();
Control the passive buzzer to emit a sound at specific frequency.
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setBuzzer(1000);
Each time this function is called, a thread will be created and a melody will be played. The thread will be closed
after playback is complete.
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setMelodyToPlay(MELODY_POWER_UP);
Buzzer.h
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#ifndef _BUZZER_h
#define _BUZZER_h
#include "NoteFrequency.h"
#include "Arduino.h"
#define MELODY_POWER_UP 0
#define MELODY_LOW_POWER 1
#define MELODY_NO_POWER 2
#define MELODY_WIFI_CONNECT_SUCCESS 3
#define MELODY_WIFI_CONNECT_FAILED 4
#define MELODY_WIFI_DISCONNECT 5
#define MELODY_BLE_CONNECT_SUCCESS 6
#define MELODY_BLE_DISCONNECT 7
#define MELODY_CAM_CONNECT_SUCCESS 8
#define MELODY_CAM_DISCONNECT 9
#define MELODY_CAM_FAILURE 10
#define MELODY_BEEP_1 11
#define MELODY_BEEP_2 12