/*
   @file Voice Module.ino
   @brief
   @n [Get the module here]
   @n This example Set the voice module volume and playback
   @n [Connection and Diagram]()

   @copyright  [DFRobot](https://www.dfrobot.com), 2016
   @copyright GNU Lesser General Public License

   @author [carl](lei.wu@dfrobot.com)
   @version  V1.0
   @date  2017-11-3
*/


#include <SoftwareSerial.h>
#include <tinyNeoPixel.h>

#define PIN       0 //Neopixel left
#define NUMPIXELS 2

// mic
const int sampleWindow = 50; // Sample window width in mS (50 mS = 20Hz)
unsigned int sample;

// mp3
SoftwareSerial Serial1(5, 4);
unsigned char order[4] = {0xAA, 0x06, 0x00, 0xB0};

// Neopixel
tinyNeoPixel pixels = tinyNeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); //left,right


void setup() {
  //Serial.begin(115200);
  Serial1.begin(9600);
  volume(0x14);//Volume settings 0x00-0x1E

  // mic setup
  Serial.begin(9600);

  // neopixel setup
  pixels.begin();
  pixels.clear(); // Set all pixel colors to 'off'
}


void loop() {

  delay(2000); //リセット後少し時間をおく
  play(0x01);//Play the music specified audio:0x01-file0001

  // Serial1.write(order,4);//order play
  // delay(2000);

  //35秒neopixelが光って消える
  delay(500);
  NeoFade(180);
  delay(500);
  //pixels.setBrightness(0); //try to clear all
  //pixels.show();
  NeoFadeout(50);

  //その後柏手を打つたびにneopixelが光って消える
  while (1)
  {
    pixels.clear(); //try to clear all
    pixels.show();
    unsigned long startMillis = millis(); // Start of sample window
    unsigned int peakToPeak = 0;   // peak-to-peak level

    unsigned int signalMax = 0;
    unsigned int signalMin = 1024;

    // collect data for 50 mS
    while (millis() - startMillis < sampleWindow)
    {
      sample = analogRead(2); // pinno. PA6=2
      if (sample < 1024)  // toss out spurious readings
      {
        if (sample > signalMax)
        {
          signalMax = sample;  // save just the max levels
        }
        else if (sample < signalMin)
        {
          signalMin = sample;  // save just the min levels
        }
      } // if
    } //while
    peakToPeak = signalMax - signalMin;  // max - min = peak-peak amplitude
    double volts = (peakToPeak * 5.0) / 1024;  // convert to volts

    Serial.println(volts);

    if (volts > 4.9)  //when clap
    {
      delay(1500);
      play(0x03);//Play the bell
      // Serial1.write(order,4);//order play
      delay(100);
      NeoFade(10);
      NeoFadeout(10);
      delay(100);
      //pixels.setBrightness(0); //try to clear all
      //pixels.show();

    } //if
  } //while(1)

} //loop


// Neopixel variable definition

void NeoFade(int FadeSpeed)
{
  int fspeed;
  for (int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, 255, 255, 200);
  } for (int j = 1; j < 255; j = j + 2)
  {
    pixels.setBrightness(j);
    pixels.show();
    delay(FadeSpeed);
  }
  //  pixels.setBrightness(0); //try to clear all
  //  pixels.show();
}

void NeoFadeout(int FadeSpeed)
{
  int fspeed;
  for (int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, 255, 255, 200);
  } for (int j = 253; j > 0; j = j - 2)
  {
    pixels.setBrightness(j);
    pixels.show();
    delay(FadeSpeed);
  }
  //  pixels.setBrightness(0); //try to clear all
  //  pixels.show();
}


void play(unsigned char Track)
{
  unsigned char play[6] = {0xAA, 0x07, 0x02, 0x00, Track, Track + 0xB3};
  Serial1.write(play, 6);
}

void volume( unsigned char vol)
{
  unsigned char volume[5] = {0xAA, 0x13, 0x01, vol, vol + 0xBE};
  Serial1.write(volume, 5);
}