Connect RF Link Transmitter / Receiver - 434MHz and MP3 Shield on an UNO

Projects Programming
1

For my project to work I need to get my 2 Arduino uno to connect to RF Link Transmitter / Receiver - 434MHz and play MP3 files.
I have a Transmitter and Receiver working using the basic VirtualWire.h sketchs
I have a Sparkfun MP3 shield working using SFEMP3Shield sketch (Sparkfun MP3 Shield Arduino Library « The Mind of Bill Porter)
However I don’t know how to combine these Sketches to trigger the MP3 player.

2

Code?

3

The code for the MP# player is to big to post but below is the code for both the transmitter and receiver.
This is the link to the MP3 player code and documentation.
http://mpflaga.github.com/Sparkfun-MP3-Player-Shield-Arduino-Library/files.html

Thank you!
tjetdraw

// transmitter.pde
//
// Simple example of how to use VirtualWire to transmit messages
// Implements a simplex (one-way) transmitter with an TX-C1 module
//
// See VirtualWire.h for detailed API docs
// Author: Mike McCauley (mikem@open.com.au)
// Copyright (C) 2008 Mike McCauley
// $Id: transmitter.pde,v 1.3 2009/03/30 00:07:24 mikem Exp $

#include <VirtualWire.h>

void setup()
{
    Serial.begin(9600);	  // Debugging only
    Serial.println("setup");

    // Initialise the IO and ISR
    vw_set_ptt_inverted(true); // Required for DR3100
    vw_setup(2000);	 // Bits per sec
}

void loop()
{
    const char *msg = "hello";

    digitalWrite(13, true); // Flash a light to show transmitting
    vw_send((uint8_t *)msg, strlen(msg));
    vw_wait_tx(); // Wait until the whole message is gone
    digitalWrite(13, false);
    delay(200);
}

// receiver.pde
//
// Simple example of how to use VirtualWire to receive messages
// Implements a simplex (one-way) receiver with an Rx-B1 module
//
// See VirtualWire.h for detailed API docs
// Author: Mike McCauley (mikem@open.com.au)
// Copyright (C) 2008 Mike McCauley
// $Id: receiver.pde,v 1.3 2009/03/30 00:07:24 mikem Exp $

#include <VirtualWire.h>

void setup()
{
    Serial.begin(9600);	// Debugging only
    Serial.println("setup");

    // Initialise the IO and ISR
    vw_set_ptt_inverted(true); // Required for DR3100
    vw_setup(2000);	 // Bits per sec

    vw_rx_start();       // Start the receiver PLL running
}

void loop()
{
    uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN;

    if (vw_get_message(buf, &buflen)) // Non-blocking
    {
	int i;

        digitalWrite(13, true); // Flash a light to show received good message
	// Message with a good checksum received, dump it.
	Serial.print("Got: ");
	
	for (i = 0; i < buflen; i++)
	{
	    Serial.print(buf[i], HEX);
	    Serial.print(" ");
	}
	Serial.println("");
        digitalWrite(13, false);
    }
}
4

Where is the code that shows you tried to combine the MP3 player and the receiver code?

5

I just add the VirtualWire Libraries to the MP3 code thinking that the commands would be received through the serial port. Now on the transmitter side I just changed to code send the command (2) to play track number 2 like this, "(const char *msg = "2";)"

/**

#include <SPI.h>

//Add the SdFat Libraries
#include <SdFat.h>
#include <SdFatUtil.h>

//and the MP3 Shield Library
#include <SFEMP3Shield.h>

//Add the VirtualWire Libraries
#include <VirtualWire.h>
6

Anyone could tell me how to clear the data in the buffer from this code " uint8_t buf[VW_MAX_MESSAGE_LEN];
uint8_t buflen = VW_MAX_MESSAGE_LEN;

if (vw_get_message(buf, &buflen))"
After I receive the data?
Thanks

tjetdraw:
The code for the MP# player is to big to post but below is the code for both the transmitter and receiver.
This is the link to the MP3 player code and documentation.
http://mpflaga.github.com/Sparkfun-MP3-Player-Shield-Arduino-Library/files.html

Thank you!
tjetdraw

// transmitter.pde

//
// Simple example of how to use VirtualWire to transmit messages
// Implements a simplex (one-way) transmitter with an TX-C1 module
//
// See VirtualWire.h for detailed API docs
// Author: Mike McCauley (mikem@open.com.au)
// Copyright (C) 2008 Mike McCauley
// $Id: transmitter.pde,v 1.3 2009/03/30 00:07:24 mikem Exp $

#include <VirtualWire.h>

void setup()
{
    Serial.begin(9600);   // Debugging only
    Serial.println("setup");

// Initialise the IO and ISR
    vw_set_ptt_inverted(true); // Required for DR3100
    vw_setup(2000); // Bits per sec
}

void loop()
{
    const char *msg = "hello";

digitalWrite(13, true); // Flash a light to show transmitting
    vw_send((uint8_t *)msg, strlen(msg));
    vw_wait_tx(); // Wait until the whole message is gone
    digitalWrite(13, false);
    delay(200);
}

// receiver.pde
//
// Simple example of how to use VirtualWire to receive messages
// Implements a simplex (one-way) receiver with an Rx-B1 module
//
// See VirtualWire.h for detailed API docs
// Author: Mike McCauley (mikem@open.com.au)
// Copyright (C) 2008 Mike McCauley
// $Id: receiver.pde,v 1.3 2009/03/30 00:07:24 mikem Exp $

#include <VirtualWire.h>

void setup()
{
    Serial.begin(9600); // Debugging only
    Serial.println("setup");

// Initialise the IO and ISR
    vw_set_ptt_inverted(true); // Required for DR3100
    vw_setup(2000); // Bits per sec

vw_rx_start();      // Start the receiver PLL running
}

void loop()
{
    uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN;

if (vw_get_message(buf, &buflen)) // Non-blocking
    {
int i;

digitalWrite(13, true); // Flash a light to show received good message
// Message with a good checksum received, dump it.
Serial.print("Got: ");

for (i = 0; i < buflen; i++)
{
    Serial.print(buf[i], HEX);
    Serial.print(" ");
}
Serial.println("");

digitalWrite(13, false);
    }
}