DY-SV5W Voice Playback Module: Serial Music Control

				
					#include <SoftwareSerial.h>


// SoftwareSerial(RX, TX)
SoftwareSerial VOICE(0, 1);   // D10 <- TXD , D11 -> RXD（RXD串1K）


uint8_t calcChecksum(const uint8_t *buf, uint8_t len) {
  uint16_t sum = 0;
  for (uint8_t i = 0; i < len - 1; i++) {
    sum += buf[i];
  }
  return (uint8_t)(sum & 0xFF);
}

void sendCmd(uint8_t *buf, uint8_t len) {
  buf[len - 1] = calcChecksum(buf, len);
  VOICE.write(buf, len);
}


uint8_t CMD_PLAY[4]   = {0xAA, 0x02, 0x00, 0x00};

uint8_t CMD_STOP[4]   = {0xAA, 0x10, 0x00, 0x00};

uint8_t CMD_QUERY[4]  = {0xAA, 0x01, 0x00, 0x00};


uint8_t CMD_LOOP_ONE[5]  = {0xAA, 0x18, 0x01, 0x01, 0x00};
uint8_t CMD_LOOP_STOP[5] = {0xAA, 0x18, 0x01, 0x02, 0x00};


void setVolume(uint8_t vol) {
  if (vol > 30) vol = 30;
  uint8_t buf[5] = {0xAA, 0x13, 0x01, vol, 0x00};
  sendCmd(buf, 5);
}

void playTrack(uint16_t track) {
  uint8_t buf[6] = {
    0xAA, 0x07, 0x02,
    (uint8_t)(track >> 8),
    (uint8_t)(track & 0xFF),
    0x00
  };
  sendCmd(buf, 6);
}


// disk: 0=USB 1=SD 2=FLASH
void insertTrack(uint8_t disk, uint16_t track) {
  uint8_t buf[7] = {
    0xAA, 0x16, 0x03,
    disk,
    (uint8_t)(track >> 8),
    (uint8_t)(track & 0xFF),
    0x00
  };
  sendCmd(buf, 7);
}

void playResume() { sendCmd(CMD_PLAY, 4); }
void stopPlay()   { sendCmd(CMD_STOP, 4); }
void queryState() { sendCmd(CMD_QUERY, 4); }

/* ================= millis  ================= */
unsigned long lastMillis = 0;

bool everyMillis(unsigned long interval) {
  if (millis() - lastMillis >= interval) {
    lastMillis = millis();
    return true;
  }
  return false;
}


void setup() {
  Serial.begin(9600);
  VOICE.begin(9600);

  delay(300);

  setVolume(30);            //  30
  delay(50);

  sendCmd(CMD_LOOP_ONE, 5); // 
  delay(50);

  playTrack(1);             
}


void loop() {
 
  if (everyMillis(5000)) {
    insertTrack(1, 3);   // 
  }
}