Buzzer Library for Arduino - ezBuzzer

This library is designed for a buzzer to beep or play melody without blocking other code.

ezBuzzer stands for easy buzzer, which means that the library is easy to use.

Features

• Supports both active and passive buzzers
• Supports active HIGH and active LOW buzzers
• Supports beep with customizable frequency
• Supports melody playback
• Supports manual ON/OFF control
• All functions are non-blocking (no delay() function)
• Cross-platform compatible (all Arduino architectures)

Available Examples

• Beep
• Melody
• MelodyRepeat

Available Functions

• ezBuzzer(pin, buzzerType, activeLevel) - Constructor with buzzer type and active level
• stop() - Stop buzzer and cancel any ongoing beep/melody
• turnON() - Turn buzzer ON continuously
• turnOFF() - Turn buzzer OFF (same as stop)
• beep(time) - Beep for specified duration
• beep(time, delay) - Beep with delay before starting
• beep(time, delay, frequency) - Beep with custom frequency (passive buzzer)
• playMelody(melody, durations, length) - Play a melody
• setBuzzerType(type) - Set BUZZER_TYPE_ACTIVE or BUZZER_TYPE_PASSIVE
• setBeepFrequency(frequency) - Set default beep frequency for passive buzzer
• getState() - Get current buzzer state
• loop() - Must be called in loop() for non-blocking operation

Buzzer Types

• BUZZER_TYPE_ACTIVE - Active buzzer (has internal oscillator, uses digitalWrite)
• BUZZER_TYPE_PASSIVE - Passive buzzer (requires PWM signal, uses tone())

Active Levels

• HIGH - Buzzer sounds when pin is HIGH (default, most common)
• LOW - Buzzer sounds when pin is LOW (some shields like Multi-Function Shield)

Tested Hardware

Buzzer Modules:

• 3V-24V Active Piezoelectric Buzzer
• Active Piezo Buzzer Module
• Passive Piezo Buzzer Module
• Multi-Function Shield for Arduino - Built-in active LOW buzzer

MCU Boards:

Board	Tested	Notes
Arduino Uno R3	✅	Fully supported
Arduino Uno R4 WiFi	✅	Fully supported
Arduino Uno R4 Minima	✅	Fully supported
Arduino Mega	✅	Fully supported
Arduino Giga	✅	Fully supported
DIYables STEM V3 Board	✅	Fully supported
DIYables STEM V4 IoT Board	✅	Fully supported
DIYables Compact V3.0 ATMEGA328P	✅	Fully supported
DIYables ESP32	✅	Fully supported
DIYables ESP8266	✅	Fully supported

How To Install the Library

• ezBuzzer Library Installation Guide

References

• ezBuzzer Library Reference