Lesson 6. SPEAKER. Play Jingle Bells

[Dimi]

Step 1. Go to the folder Arduino-ESP32-IDE and open the app arduino.exe (Fig. 1);

Figure 1. The archive with the Arduino IDE extracted to the folder

Step 2. On the File menu, select New (Fig. 1.1);

Figure 1.1. Create a new sketch

Step 3. Select Include Library, M5Stack in the Sketch menu (Fig. 1.2);

Figure 1.2. Connection library M5Stack

Figure 1.3. The holes for the sound from the built-in speaker are located on the right side of the device

Figure 1.4. Speaker is located on the left of the bus 2 to 15

Step 4. Add to the beginning of system functions void setup() function call M5.begin (); because it is necessary to prepare the device to work. Add to the end system functions void loop() function call M5.update (); is required for correct operation of the device with built-in speaker. This step should be performed always when writing a new sketch (Fig. 2).

Figure 2. An example of the correct preparation of the sketch for work with built-in speaker

Step 5. To work with the speaker (Fig. 1.3, 1.4) use the following functions and constants notes in table 1 and 2 respectively:

List 1. Functions for working with built-in speaker

• M5.Speaker.tone(uint32_t freq); to Generate a beep at a specified frequency (Hz)
• M5.Speaker.mute(); Interrupt generation

List 2. Constant notes (frequencies rounded to whole numbers)

• #define NOTE_D0 -1 silence
  THE FIRST OCTAVE
• #define NOTE_B1 262 To (B)
• #define NOTE_Cd1 277 C sharp (C#)
• #define NOTE_D1 294 Re (D)
• #define NOTE_Dd1 311 in D sharp (D#)
• #define NOTE_E1 330 Mi (E)
• #define NOTE_F1 349 FA (F)
• #define NOTE_Fd1 370 f-sharp (F#)
• #define NOTE_G1 392 Sol (G)
• #define NOTE_Gd1 415 g sharp (G#)
• #define NOTE_A1 440 La (A)
• #define NOTE_Ad1 466 La-a sharp (A#)
• #define NOTE_H1 494 si (H)

Step 6. Write a music box (Fig. 2.1, 2.2);

Figure 2.1. Code music box. Page first

Figure 2.2. Code music box. Page two

Step 7. Click the Upload button (Fig. 3) in order to flash the device;

Figure 3. Download the firmware to the device

Step 8. When the device firmware is completed, press the A button and enjoy the melody :)