tmrpcm code problem

Other Hardware Audio
1

I am trying to make a project on Home Security.
When laser beam is off arduino will play an audio file from sd card with tmrpcm library. And when a button is pressed the audio will be stopped. But the audio file is not playing. I don't know why. Please help me.Here is the code:

#include <SD.h>
#define SD_ChipSelectPin 4
#include <TMRpcm.h>
#include <SPI.h>

TMRpcm tmrpcm;

const int sensivity = 400;

#define ldr A0
#define buttonPin A2

int buttonState;
int state = 0;

void setup() {

Serial.begin(9600);
if (!SD.begin(SD_ChipSelectPin)) {
Serial.println("SD fail");
return;
}

tmrpcm.speakerPin = 9;

}

void alarmOFF() {

tmrpcm.disable();

}

void alarmON() {
tmrpcm.stopPlayback();
tmrpcm.setVolume(2);
tmrpcm.play("1.wav");
}

void loop() {

int light = analogRead(ldr);
int button = analogRead(buttonPin);

if (button >= 1020) {
state = 0;
}

if (light > sensivity) {
state = 1;
}

if ((light <= sensivity) && (state == 0)) {

alarmOFF();

}

if (state == 1) {
alarmON();

}
}

2

Have you tried some basic code which just plays your file? Does that work o.k.?

How is the button wired and why do you need to use analogRead() with a button?

Put some Serial.prints in to show exactly what values you are getting from the LDR and button.

Steve

3

The Alarming system is Ok. There is no problem in it. But the problem is in playing the audio file.
When the alarm turns on I can hear some buzzing sound which disappears after the alarm is off. It doesn't play any kind of audio file..

4

All the alarm does is play an audio file so it seems a bit odd to claim you know its working when it doesn't play an audio file.

I'll guess that there's something wrong with whatever you have connected to pin 9 or your audio file is bad e.g. in an invalid format.

Steve