Mp3 open smart with 433 rf

Projects General Guidance
1

when the mp3 start to work I cant get any serial output from the 433 rf
and I cant control on Arduino with rf commends like its block the incoming data
here is the code:

#include <RCSwitch.h>
// Include required libraries:
#include <SoftwareSerial.h>

// Define the RX and TX pins to establish UART communication with the MP3 Player Module.
#define MP3_RX 5 // to TX
#define MP3_TX 4 // to RX

// Select storage device to TF card
static int8_t select_SD_card[] = {0x7e, 0x03, 0X35, 0x01, 0xef}; // 7E 03 35 01 EF
// Play with index: /01/001xxx.mp3
static int8_t play_first_song[] = {0x7e, 0x04, 0x41, 0x00, 0x01, 0xef}; // 7E 04 41 00 01 EF
// Play with index: /01/002xxx.mp3
static int8_t play_second_song[] = {0x7e, 0x04, 0x41, 0x00, 0x02, 0xef}; // 7E 04 41 00 02 EF
// Play the song.
static int8_t play[] = {0x7e, 0x02, 0x01, 0xef}; // 7E 02 01 EF
// Pause the song.
static int8_t pause[] = {0x7e, 0x02, 0x02, 0xef}; // 7E 02 02 EF

static int8_t sleep2[] = {0x7e, 0x03, 0x35, 0x03, 0xef};

static int8_t wake[] = {0x7E, 0x03, 0x35, 0x02, 0xef};
SoftwareSerial MP3(MP3_RX, MP3_TX);

RCSwitch mySwitch = RCSwitch();

void setup() {
  Serial.begin(19200);
  MP3.begin(9600);
  // Select the SD Card.
  send_command_to_MP3_player(select_SD_card, 5);  
  mySwitch.enableReceive(1);  // Receiver on interrupt 0 => that is pin #2
  
}

void loop() {
  if (mySwitch.available()) {
    
    if (mySwitch.getReceivedValue() == 1244)
    {

      send_command_to_MP3_player(play, 4);
    }
    if (mySwitch.getReceivedValue() == 1245)
    {

      send_command_to_MP3_player(pause, 4);
    }
    output(mySwitch.getReceivedValue(), mySwitch.getReceivedBitlength(), mySwitch.getReceivedDelay(), mySwitch.getReceivedRawdata(),mySwitch.getReceivedProtocol());
    mySwitch.resetAvailable();
  }      
}
void send_command_to_MP3_player(int8_t command[], int len){
  for(int i=0;i<len;i++){ MP3.write(command[i]);}
 delay(250);
}
2

I see that you left out "MP3.begin(baudrate);" Is that what was causing the RF receive to stop working?

So you are using Pin 3 (Interrupt 1)?

3

No its my mistake ,the idea is working only in first transmit, and when the mp3 start playing it stuck the second transmit never happened

And it pin 2 on micro pro

4

Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advice on) your project :wink: See About the Installation & Troubleshooting category.