/*
來客觸動開關，報音
*/
#define btn 33
#define buzzer 22
//中音音階-------------------
#define C5 523	
#define D5 587	
#define E5 659	
#define F5 698	
#define G5 784	
#define A5 880	
#define B5 988
//高音音階-------------------
#define C6 1047	
#define D6 1175	
#define E6 1319	
#define F6 1397	
#define G6 1568	
#define A6 1760	
#define B6 1976
//-------------------
void setup() {
  Serial.begin(115200);
  pinMode(btn, INPUT_PULLUP);
  pinMode(buzzer, OUTPUT);
}
void loop() {  
  if(!digitalRead(btn)){    //開門碰觸微動
    while(!digitalRead(btn)); //防彈跳
    sound();                  // 播放音樂 
  }
  delay(10);           // 偵測間距
}
// 音樂播放
void sound(){
  //音階 E6 C6 G5 C6 D6 G6 D6 E6 D6 G5 C6
  //音長 1  1  1  1  1  2  1  1  1  1  2
  int t = 300; //基本節拍
  tone(buzzer, E6, t);   Serial.println("Mi_E6");
  tone(buzzer, C6, t);   Serial.println("Do_C6");
  tone(buzzer, G5 , t);  Serial.println("So_G5");
  tone(buzzer, C6, t);   Serial.println("Do_C6");
  tone(buzzer, D6, t);   Serial.println("Re_D6");
  tone(buzzer, G6, 2*t); Serial.println("So_G6");
  tone(buzzer, D6, t);   Serial.println("Re_D6");
  tone(buzzer, E6, t);   Serial.println("Mi_E6");
  tone(buzzer, D6, t);   Serial.println("Re_D6");
  tone(buzzer, G5 , t);  Serial.println("So_G5");
  tone(buzzer, C6, 2*t); Serial.println("Do_C6"); 
}