Things used in this project

Hardware components:
Photon new
Particle Photon
×1
12002 04
Breadboard (generic)
×1
11026 02
Jumper wires (generic)
×1
Hand tools and fabrication machines:
Lasercutter
Laser cutter (generic)

Code

Sound Code for PhotonArduino
const long sample_rate = 50; // time between samples (in miliseconds)
const int array_size = 1200; // 1000/50=20 * 60=1200
int snd_array[array_size] = {};
int snd_max, prev_max = 0;
int snd_min, prev_min = 4096;
double snd_avg = 2048;

const int blink_thresh = 2048;

unsigned long broadcast_interval = 3000;
unsigned long last_broadcast = 0;

void averageReading(int value) {

    // Shift all the values right by 1
    for(int i = array_size-1; i >= 1; i--) 
    {
        snd_array[i] = snd_array[i-1]; 
        if((snd_array[i] < snd_min) && (snd_array[i] != 0))
        {
            snd_min = snd_array[i];
            
        }
        if(snd_array[i] > snd_max)
        {
            snd_max = snd_array[i];
            
        }
    }

    snd_array[0] = value; 

    // Average array
    float avg_sum = 0; 
    int size = 0 ;
    for (int a=0; a <= array_size; a++) 
    {
        if(snd_array[a] > 0)
        {
            size++ ;
            avg_sum  = avg_sum + snd_array[a];
        }
    }
    snd_avg = avg_sum / size;
}

void blinkMic(int reading) {
    if(reading > blink_thresh) {
        digitalWrite(D7, HIGH);
    } else {
        digitalWrite(D7, LOW);
    }
}


void checkBroadcast() {
    unsigned long now = millis();
    if((now - last_broadcast) > broadcast_interval) {
        Serial.print("Avg: "); Serial.println(snd_avg);
        Serial.print("Min: "); Serial.println(snd_min);
        Serial.print("Max: "); Serial.println(snd_max);
        snd_avg = 0;
        snd_min = 4096;
        snd_max = 0;
        //snd_array[array_size] = {};
        last_broadcast = now;
    }
}

void setup() {
    Serial.begin(9600);
    pinMode(A0, INPUT); // mic AUD connected to Analog pin 0
    pinMode(D7, OUTPUT); // flash on-board LED
   
    Particle.variable("snd_avg", snd_avg);
    Particle.variable("snd_max", snd_max);
    Particle.variable("snd_min", snd_min);

}

void loop() {
    int mic_reading = analogRead(0); //Serial.println(mic_reading);
    blinkMic(mic_reading);
    averageReading(mic_reading); 
    checkBroadcast();

    delay(sample_rate);
}

Credits

Replications

Did you replicate this project? Share it!

I made one

Love this project? Think it could be improved? Tell us what you think!

Give feedback

Comments

Similar projects you might like

AquaNiner Pet Hydration Monitor
Intermediate
  • 382
  • 14

Full instructions

Using two Photons, IFTTT and ThingSpeak, get notifications for when your furry friend needs water and monitor how much they're drinking.

Hot Shot Hoops
Intermediate
  • 530
  • 13

Full instructions

No need to keep track of the number of baskets you make when shooting hoops. Hot Shot Hoops does the work for you.

Hot Shot Hoops

Team IOT Basketball

Temperature Mirror
Intermediate
  • 381
  • 8

Full instructions

The Temperature Mirror incorporates a digital display to allow its user to readily view time, temperature, humidity, and light.

Temperature Mirror

MEGR3171 Team 49

Pet Feeder
Intermediate
  • 414
  • 7

Full instructions

Automated pet food dispenser to feed our pets when we are not at home by using an IoT device.

Teacher Tracker
Intermediate
  • 176
  • 4

Full instructions

If you want to know when a professor comes back to his/her office so you can ask annoying questions then this an option

LightAlert
Intermediate
  • 138
  • 4

Full instructions

As the great Terry Crews once said "that's 49 cents of milk spilt over the table! Somebody's gonna drink that!" But instead... electricity.

Add projectSign up / Login
Respect project