ESP32 IoT Future Board Kittenblock Programming Tutorial 02 - Buzzer

ESP32, Future Board, Internet of Things, Kittenblock, kittenbot, sensor, Tutorial
September 24, 2021
Anny Xu

Sound is used very often in hardware programming; it is also a direct way of feedback. This article will introduce the buzzer of Future board thoroughly and teach you how to program them with Kittenblock and to have more fun with it.

Programming Blocks

Block	Introduction
	The buzzer plays for a period of time at a certain frequency Different frequencies correspond to different keys/tones
	The buzzer plays constantly at a certain frequency
	Map the frequency to the corresponding octave, it will make it easier to use
	Pause for a period of time according to the beats ( equivalent to delaying) Depends on bpm. When it is default bpm125, 1 beat equals 0.5 seconds
	Play the custom melody
	Play the melody in the system
	Beats per minute, which equals the playing speed
	stop playing, normally used in combination with keep playing block

Example

📋：Buzzer frequency sounds

📥frequency-tone reference

📋：Buzzer frequency keep making sounds

suitable for making instrument(piano) project

📋：Buzzer plays according to the notes

Play all the notes within the octave

📋：Play the melody

Take c4:2 as an example:

c: Represent notes from do to ti. An octave includes 7 notes, which are c, d, e, f, g, a, and b.

4: the octave, for example, 4 is the fourth octave.

:2: Duration. Take the default situation as an example, when bpm=120 and the quarter note as one beat, 2 beats per second => 0.5 sec/beat, 2 represents half of the quarter note, so the duration of c4:2 is 0.25 seconds.