RAK18001_Buzzer.ino

/**
   @file RAK18001_Buzzer.ino
   @author rakwireless.com
   @brief period buzzer test and play a funny song
   @version 0.1
   @date 2020-12-28
   @copyright Copyright (c) 2020
**/

#include <Arduino.h>

#define BUZZER_CONTROL  WB_IO1

//This part is the note and rhythm of the song
#define NTC0 -1
#define NTC1 262
#define NTC2 294
#define NTC3 330
#define NTC4 350
#define NTC5 393
#define NTC6 441
#define NTC7 495

#define NTCL1 131
#define NTCL2 147
#define NTCL3 165
#define NTCL4 175
#define NTCL5 196
#define NTCL6 221
#define NTCL7 248  

#define NTCH1 525
#define NTCH2 589
#define NTCH3 661
#define NTCH4 700
#define NTCH5 786
#define NTCH6 882
#define NTCH7 990


#define WHOLE 1
#define HALF 0.5
#define QUARTER 0.25
#define EIGHTH 0.25
#define SIXTEENTH 0.625


int tune[]=                 //List the frequencies according to the spectrum
{
  NTC5,NTC5,NTC6,
  NTCH1,NTC6,NTC5,NTC6,NTCH1,NTC6,NTC5,
  NTC3,NTC3,NTC3,NTC5,
  NTC6,NTC6,NTC5,NTCH3,NTCH3,NTCH2,NTCH1,
  NTCH2,NTCH1,NTCH2,
  NTCH3,NTCH3,NTCH2,NTCH3,NTCH2,NTCH1,NTCH2,NTCH1,NTC6,

  NTCH2,NTCH2,NTCH2,NTCH1,NTC6,NTC5,
  NTC6,NTC5,NTC5,NTCH1,NTC6,NTC5,NTC1,NTC3,
  NTC2,NTC1,NTC2,
  NTC3,NTC5,NTC5,NTC3,NTCH1,NTC7,
  NTC6,NTC5,NTC6,NTCH1,NTCH2,NTCH3,

  NTCH3,NTCH2,NTCH1,NTC5,NTCH1,NTCH2,NTCH3,

  NTCH2,NTC0,NTCH3,NTCH2,
  NTCH1,NTC0,NTCH2,NTCH1,NTC6,NTC0,

  NTCH2,NTC6,NTCH1,NTCH1,NTCH1,NTC6,NTC5,NTC3,
  NTC5,
  NTC5,NTC6,NTCH1,NTC7,NTC6,
  NTCH3,NTCH3,NTCH3,NTCH3,NTCH2,NTCH2,NTCH1,
  NTC6,NTCH3,NTCH2,NTCH1,NTCH2,NTCH1,NTC6,
  NTCH1,
};
float durt[]=                   //List the beats according to the notation
{
0.5,0.25,0.25,
1.5,0.5,0.5,0.25,0.25,0.5,0.5,
1+1+1,0.5,0.25,0.25,
1.5,0.5,0.5,0.5,0.25,0.25,0.5,
1+1+1,0.5,0.5,
0.5,0.5,0.5,0.25,0.25,0.5,0.25,0.25,0.5,
0.5,0.5,0.5,0.25,0.25,1+1,
0.5,0.5,0.5,0.5,0.5,0.5,0.5,0.5,
1+1+1,0.5,0.5,


1.5,0.5,0.5,0.5,0.5,0.5,
1.5,0.5,1,0.5,0.25,0.25,
1.5,0.5,0.5,0.5,0.5,0.25,0.25,
1+1+1,0.5,0.25,0.25,
1,0.5,0.25,0.25,1,1,
0.5,0.5,0.5,0.5,1,0.25,0.25,0.5,
1+1+1+1,
0.5,0.5,0.5,0.5,1+1,
0.5,0.5,0.5,0.5,1.5,0.25,0.25,
1.5,0.5,1,0.25,0.25,0.25,0.25,1+1+1+1,

};

int length = 0;
// setting PWM properties
const int freq = 5000;
const int ledChannel = 0;
const int resolution = 8;

void setup()
{
  ledcSetup(ledChannel, freq, resolution);
  
  // attach the channel to the GPIO to be controlled
  ledcAttachPin(BUZZER_CONTROL, ledChannel);

  length=sizeof(tune)/sizeof(tune[0]);   //Calculation length
}
void loop()
{
  for(int x=0; x < length; x++)
  {
    ledcWriteTone(ledChannel,tune[x]);
    delay(500*durt[x]);   //Here it is used to adjust the delay according to the beat. The 500 index can be adjusted by myself. In this music, I find that 500 is more suitable.
    ledcWriteTone(ledChannel, 0);
  }
  delay(2000);
}