Secure My Home

 
// change this to false to use the hand rolled version
var useUpmVersion = true;

// we want mraa to be at least version 0.6.1
var mraa = require('mraa');
var version = mraa.getVersion();

if (version >= 'v0.6.1') {
    console.log('mraa version (' + version + ') ok');
}
else {
    console.log('meaa version(' + version + ') is old - this code may not work');
}



var upmBuzzer = require("jsupm_buzzer");// Initialize on GPIO 5
var myBuzzer = new upmBuzzer.Buzzer(5);
var chords = [];
chords.push(upmBuzzer.DO);
chords.push(upmBuzzer.RE);
chords.push(upmBuzzer.MI);
chords.push(upmBuzzer.FA);
chords.push(upmBuzzer.SOL);
chords.push(upmBuzzer.LA);
chords.push(upmBuzzer.SI);
chords.push(upmBuzzer.DO);
chords.push(upmBuzzer.SI);
var chordIndex = 0;

// Print sensor name
console.log(myBuzzer.name());

function SoundAlert() {
    if (chords.length != 0) {
        //Play sound for one second
        console.log(myBuzzer.playSound(chords[chordIndex], 1000000));
        chordIndex++;
        //Reset the sound to start from the beginning. 
        if (chordIndex > chords.length - 1)
            chordIndex = 0;
    }
}

//setInterval(melody, 100);

// Print message when exiting



var upmMicrophone = require("jsupm_mic");
// Attach microphone to analog port A0
var myMic = new upmMicrophone.Microphone(0);

var threshContext = new upmMicrophone.thresholdContext;
threshContext.averageReading = 0;
threshContext.runningAverage = 0;
threshContext.averagedOver = 2;

var is_running = false;
// Infinite loop, ends when script is cancelled
// Repeatedly, take a sample every 2 microseconds;
// find the average of 128 samples; and
// print a running graph of the averages
while (1==1) {
    console.log("in loop");
    var buffer = new upmMicrophone.uint16Array(128);
    var len = myMic.getSampledWindow(60, 128, buffer);
    if (len) {
        var thresh = myMic.findThreshold(threshContext, 30, buffer, len);
        myMic.printGraph(threshContext);
        if (thresh) {
            console.log("Threshold is " + thresh);
            SoundAlert();
            displayAlert('Security Alarm');
        }
        else
        {
            console.log("Not in Threshold is " + thresh);
            displayAlert('No Alert');
        }
    }
}


function displayAlert(message) {
    var lcd, display;
    if (useUpmVersion) {
        lcd = require('jsupm_i2clcd');
        display = new lcd.Jhd1313m1(0, 0x3E, 0x62);
    }
    else {
        lcd = require('./lcd');
        display = new lcd.LCD(0);
        display.setColor(0, 60, 255);
    }
    display.setCursor(1, 1);
    display.write(message);
}


// Print message when exiting
process.on('SIGINT', function () {
    console.log("Exiting...");
    process.exit(0);
});