Hey everyone, when my ultrasonic sensor senses a distance between 40 and 50, I want it to play a certain mp3 file, but the serial monitor just freezes, and I don't hear any sound. Please help!
// Volume Variables
int potPin = 2;
int volumeRaw = 0;
int volumeVar = 0;
// Sensor Variables
int echoPin = 4; // Echo Pin
int trigPin = 5; // Trigger Pin
int maximumDistance = 100; // Maximum range needed
int minimumDistance = 3; // Minimum range needed
long duration, distance; // Duration used to calculate distance
/***************************************************
This is an example for the Adafruit VS1053 Codec Breakout
Designed specifically to work with the Adafruit VS1053 Codec Breakout
----> https://www.adafruit.com/products/1381
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
// include SPI, MP3 and SD libraries
#include <SPI.h>
#include <Adafruit_VS1053.h>
#include <SD.h>
// These are the pins used for the breakout example
#define BREAKOUT_RESET 9 // VS1053 reset pin (output)
#define BREAKOUT_CS 10 // VS1053 chip select pin (output)
#define BREAKOUT_DCS 8 // VS1053 Data/command select pin (output)
// These are the pins used for the music maker shield
#define SHIELD_RESET -1 // VS1053 reset pin (unused!)
#define SHIELD_CS 7 // VS1053 chip select pin (output)
#define SHIELD_DCS 6 // VS1053 Data/command select pin (output)
// These are common pins between breakout and shield
#define CARDCS 4 // Card chip select pin
// DREQ should be an Int pin, see http://arduino.cc/en/Reference/attachInterrupt
#define DREQ 3 // VS1053 Data request, ideally an Interrupt pin
Adafruit_VS1053_FilePlayer musicPlayer =
// create breakout-example object!
//Adafruit_VS1053_FilePlayer(BREAKOUT_RESET, BREAKOUT_CS, BREAKOUT_DCS, DREQ, CARDCS);
// create shield-example object!
Adafruit_VS1053_FilePlayer(SHIELD_RESET, SHIELD_CS, SHIELD_DCS, DREQ, CARDCS);
////
void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
Serial.begin(9600);
Serial.println("Adafruit VS1053 Library Test");
// initialise the music player
if (! musicPlayer.begin()) { // initialise the music player
Serial.println(F("Couldn't find VS1053, do you have the right pins defined?"));
while (1);
}
Serial.println(F("VS1053 found"));
musicPlayer.sineTest(0x44, 500); // Make a tone to indicate VS1053 is working
if (!SD.begin(CARDCS)) {
Serial.println(F("SD failed, or not present"));
while (1); // don't do anything more
}
Serial.println("SD OK!");
// list files
printDirectory(SD.open("/"), 0);
// Set volume for left, right channels. lower numbers == louder volume!
/***** Two interrupt options! *******/
// This option uses timer0, this means timer1 & t2 are not required
// (so you can use 'em for Servos, etc) BUT millis() can lose time
// since we're hitchhiking on top of the millis() tracker
//musicPlayer.useInterrupt(VS1053_FILEPLAYER_TIMER0_INT);
// This option uses a pin interrupt. No timers required! But DREQ
// must be on an interrupt pin. For Uno/Duemilanove/Diecimilla
// that's Digital #2 or #3
// See http://arduino.cc/en/Reference/attachInterrupt for other pins
// *** This method is preferred
if (! musicPlayer.useInterrupt(VS1053_FILEPLAYER_PIN_INT))
Serial.println(F("DREQ pin is not an interrupt pin"));
}
void loop() {
//Sensor
/* The following trigPin/echoPin cycle is used to determine the
distance of the nearest object by bouncing soundwaves off of it. */
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
// some code to find duration of pulse...
if (duration == 0) {
pinMode(echoPin,OUTPUT);
digitalWrite(echoPin,LOW);
delay(100);
pinMode(echoPin,INPUT);
}
//Calculate the distance (in cm) based on the speed of sound.
distance = duration/58.2;
if (distance >= maximumDistance){
/* Send a negative number to computer and Turn LED ON
to indicate "out of range" */
Serial.println("Get closer!");
}
else if (distance <= minimumDistance){
/* Send a negative number to computer and Turn LED ON
to indicate "out of range" */
Serial.println("Too close!");
}else{
/* Send the distance to the computer using Serial protocol, and
turn LED OFF to indicate successful reading. */
Serial.println(distance);
}
//Delay 50ms before next reading.
delay(100);
if(distance > 40 && distance < 50){
musicPlayer.playFullFile("track001.mp3");
// Start playing a file, then we can do stuff while waiting for it to finish
if (! musicPlayer.startPlayingFile("track001.mp3")) {
Serial.println("Could not open file track001.mp3");
while (1);
}
Serial.println(F("Started playing"));
}
while(musicPlayer.playingMusic){
// Volume Knob Setup
volumeRaw = analogRead(potPin);
volumeVar = volumeRaw/30;
// Set volume for left, right channels. lower numbers == louder volume!
musicPlayer.setVolume(volumeVar,volumeVar);
delay(100);
}
}
/// File listing helper
void printDirectory(File dir, int numTabs) {
while(true) {
File entry = dir.openNextFile();
if (! entry) {
// no more files
//Serial.println("**nomorefiles**");
break;
}
for (uint8_t i=0; i<numTabs; i++) {
Serial.print('\t');
}
Serial.print(entry.name());
if (entry.isDirectory()) {
Serial.println("/");
printDirectory(entry, numTabs+1);
} else {
// files have sizes, directories do not
Serial.print("\t\t");
Serial.println(entry.size(), DEC);
}
entry.close();
}
}