// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2019-02-28 오후 1:53:00
// by Ok-Hyun Park
//
#include <SoftwareSerial.h>
SoftwareSerial voiceSerial(8,7);
//
int speakerpin=12; //스피커가 연결된 디지털핀 설정
//
int note1[]={2093,2349,2637,2793,3136,3520,3951,4186}; //도레미파솔라시도
int note2[]={4186,3951,3520,3136,2793,2637,2349,2093}; //도레미파솔라시도
//
void setup(){
  voiceSerial.begin(9600);
  Serial1.begin(9600); // BTSerial
  //
  int elementCount =sizeof(note )/sizeof(int);
  int elementCount1=sizeof(note1)/sizeof(int);
}
//
char id,accuracy;
//
void loop(){
  //
  if(Serial1.available()){ // BTSerial
    char r=Serial1.read();
    if(r=='1'){
      for(int i=0; i<elementCount; i++){ tone(speakerpin,note1[i],500); delay(3000); } // 1 play
    }
    if(r=='2'){
      for(int i=0; i<elementCount1; i++){ tone(speakerpin,note2[i],500); delay(500); } // 2 play
    }
  }
  //--------------------------------------
  if(voiceSerial.available()){
    id=voiceSerial.read();
    accuracy=voiceSerial.read();
    switch(id){
      case '0': Serial1.println("0"); break; // STOP
      case '1': Serial1.println("1"); break; // RED
      case '2': Serial1.println("2"); break; // GREEN
      case '3': Serial1.println("3"); break; // BLUE
    }
  }
}
 
레오나르도는 0,1번핀이 Serial1입니다.
SoftwareSerial를 두 개 사용할 필요가 없는 것이죠