using arduino serial mp3 player

Projects Programming
1

hai friends.

i wish to do a location based advertising system for buses.
for that i have gps module for tracking latitude and longitude.

when the bus is moving gps module receives the latitude and longitude. when the bus reaches a particular location an audio stored in the serial mp3 player must start playing. this is the plan.

i had seen serial mp3 player suitable for my project.

700×700 66.5 KB

but i dont know how to write the code for serial mp3 player

i had seen a code for using serial mp3 player. please help me to modify the code for playing audio when a particular gps location is matched.

example

if(lat==4323 && lon == 45635);
{
play music 1
}

please help me

#include <SoftwareSerial.h>
#define ARDUINO_RX 5//should connect to TX of the Serial MP3 Player module
#define ARDUINO_TX 6//connect to RX of the module
SoftwareSerial mySerial(ARDUINO_RX, ARDUINO_TX);
static int8_t Send_buf[8] = {0} ;

#define CMD_SEL_DEV 0X09
#define DEV_TF 0X02
#define CMD_PLAY_W_VOL 0X22
#define CMD_PLAY 0X0D
#define CMD_PAUSE 0X0E
#define CMD_PREVIOUS 0X02
#define CMD_NEXT 0X01

void setup() 
{
    mySerial.begin(9600);
          Serial.begin(9600);
      delay(500);//Wait chip initialization is complete
      sendCommand(CMD_SEL_DEV, DEV_TF);//select the TF card  
      delay(200);//wait for 200ms
      sendCommand(CMD_PLAY_W_VOL, 0X1E01);//play the first song with volume 30 class
}
String str;
void loop() 
{
if(Serial.available())

{
str = Serial.readStringUntil('\n');

if(str == "2")
{
sendCommand(CMD_PLAY_W_VOL, 0X1E02);//play the second track with volume 30 class
Serial.println("Second sound track.");
}
if(str == "3")
{
sendCommand(CMD_PLAY_W_VOL, 0X1E03);//play the third track with volume 30 class
Serial.println("Third sound track.");
}
if(str == "4")
{
sendCommand(CMD_PLAY_W_VOL, 0X1E04);//play the forth track with volume 30 class
Serial.println("Forth sound track.");
}
if(str == "ps")
{
sendCommand(CMD_PAUSE, 0X0E);//pause the playing track
Serial.println("Pause");
}
if(str == "pl")
{
sendCommand(CMD_PLAY, 0X0D);//play it again 
Serial.println("Play");
}
if(str == "pr")
{
sendCommand(CMD_PREVIOUS, 0X02);//play previous track
Serial.println("Playing previous track.");
}
if(str == "nx")
{
sendCommand(CMD_NEXT, 0X01);//play next track
Serial.println("Playing next track.");
}
 }
}

void sendCommand(int8_t command, int16_t dat)
{
  delay(20);
  Send_buf[0] = 0x7e; //starting byte
  Send_buf[1] = 0xff; //version
  Send_buf[2] = 0x06; //the number of bytes of the command without starting byte and ending byte
  Send_buf[3] = command; //
  Send_buf[4] = 0x00;//0x00 = no feedback, 0x01 = feedback
  Send_buf[5] = (int8_t)(dat >> 8);//datah
  Send_buf[6] = (int8_t)(dat); //datal
  Send_buf[7] = 0xef; //ending byte
  for(uint8_t i=0; i<8; i++)//
  {
    mySerial.write(Send_buf[i]) ;
  }
}
2

example

if(lat==4323 && lon == 45635);
{
play music 1
}

That is a lousy example. if statements rarely end with a semicolon. What type is lat? What type is lon?

They appear to be int type, and it is highly unlikely that you want to play the track the entire time that statement would be true, since that covers thousands of square meters/miles.

If you intend to make money with this product, you need to be prepared to hire a programmer. Over in Gigs and Collaboration...

I hope you don't seriously intend to use SoftwareSerial to interact with the mp3 player and to read GPS data.