Speaker

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Read this official Leafony page and explain its key points in English. For hardware help, first ask for a photo or the installed leaf models, assembly and power sources, then the goal and tools. Clarify which LED or display changed and whether a cable or leaf was replaced. Do not equate an unseen reset button with an absent one, or I2C acknowledgement with a working display. Verify specifications against sources; distinguish observations from hypotheses. Follow a redirect to its destination; if unreadable, ask for the relevant text instead of guessing.

Page: Speaker

URL: https://docs.leafony.com/en/examples/beginner/stm32-mcu/exten/speaker/

Description / headings (excerpt): Overview / Leaf to use / Assembly / Source code

Overview

Use the piezoelectric loudspeaker in the SP&PIR Leaf to make the melody sound.

Leaf to use

Use the following leaves.

Type	Name	Q’ty
AI02	SP&PIR	1
AP03	STM32 MCU	1
AV01	CR2032	1
AZ01	USB	1
AZ62	Connector Cover	1
	CR2032 coin cell battery	1
	M2*15mm screw	2

Assembly

Let’s assemble leaves as shown in the figure below.

Source code

Open the Arduino, go to File → Sketch Examples → 02.Digital → toneMelody.

In this sample code, the speaker is supposed to be connected to pin number 8.
But as the loudspeaker is connected to pin 5 in Leafony, you should fix the following part to make it correct.¹

Change the 8 to PB4 in line 37.

tone(PB4, melody[thisNote], noteDuration);

Change 8 to PB4 in line 44.

noTone(PB4);

Execution Results

The melody sounds only once from the speakers.

The program differs from the AVR MUC leaf only in the designation of the pins. For more information, here. ↩