Published April 12, 2017

Drink Alert!!! (Beverage Can Monitor)

Tired of going to grab a soda only to find they're all gone!? Well now you have an alert system to let you know when you need to refill.

BeginnerFull instructions provided4 hours1,403

Things used in this project

Hardware components

Particle Photon

PIR Motion Sensor (generic)

Breadboard (generic)

LED (generic)

SparkFun Pushbutton switch 12mm

Buzzer

Jumper wires (generic)

Software apps and online services

IFTTT Maker service

Google Sheets

Story

Objective

For our Instrumentation IoT project we were to come up with a project that would make our lives easier. Recently I have been dealing with going to get a drink out of the fridge only to find that they were all gone. Refill alert is a system to notify you when you are low on drinks or when someone has taken a drink without asking you first.

How It Works

A PIR motion sensor is attached to a breadboard that has a photon on it. We put an led light on the board to let us know that our sensor is working in case the alarm doesn't sound. The sensor and led were wired to a photon that is powered by a power bank.

First Photon Setup

When the sensor detects motion the photon will publish an event to the particle cloud. (Note: If the photon is placed in a refrigerator it may lose wifi. For me it only took about 5-10 seconds for the wifi to re-establish after opening the door. You may want to lengthen your motion sensor wires and only put the sensor inside the fridge, with the photon attached outside the door for optimum performance.)

The second photon will get the first photons published event and will set off an alarm. The alarm will continue on a loop until the button is pushed to void the loop. The second photon setup has a photon hooked to a power bank, buzzer, and tactical push button all attached to a breadboard. The second photon is placed near the extra drinks so that when you go to turn off the alarm, you can grab some drinks to refill your fridge.

Second Photon Setup

We set up two different applets on IFTTT (IF This Then That). One applet is made up of the Particle and Notification apps to send a notification to the users phone when the second photon publishes an event. This allows you to see if anyone is drinking your drinks without your permission. The other applet works with the Particle and Google Drive apps to add a string of data to the users Google Sheets in Google Drive. This allows you to see a graph that includes the date, time and how often a drink is being taken.

Applets used on IFTTT

IFTTT published data to Google Sheets

Graph from Google Sheets

This data was taken as we were working on the project. I promise I did not drink 40 drinks in 5 minutes, but that would be impressive.

Watch the video below to see how it works!

Drink Alert!

Code

int inputPin = D0;              // choose the input pin (for PIR sensor)
int ledPin = D1;                // LED Pin
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status

int calibrateTime = 10000;      // wait for the calibration

void setup()
{
  pinMode( ledPin, OUTPUT );
  pinMode(inputPin, INPUT);     // declare sensor as input
}

void loop()
{

  // if the sensor is calibrated
  if ( calibrated() )
  {
  // get the data from the sensor
    readTheSensor();

    // report it out, if the state has changed
    reportTheData();
  }
}

void readTheSensor() {
  val = digitalRead(inputPin);
}

bool calibrated() {
  return millis() - calibrateTime > 0;
}

void reportTheData() {

  // if the sensor reads high
  // or there is now motion
  if (val == HIGH) {

    // the current state is no motion
    // i.e. it's just changed
    // announce this change by publishing an event
    if (pirState == LOW) {
      // we have just turned on
      Particle.publish("designingiot/s17/jadam125");
      // Update the current state
      pirState = HIGH;
      setLED( pirState );
    }
  } else {
    if (pirState == HIGH) {
      // we have just turned of
      // Update the current state
      pirState = LOW;
      setLED( pirState );
    }
  }
}

void setLED( int state )
{
  digitalWrite( ledPin, state );
}

int refill = 0;
int buzz = D0;  //pin call out for the buzzer
int buzzer = D3; //pin call out for the pushbutton

 int  x, minX;
void setup() {
    pinMode(D7, OUTPUT);
    pinMode(buzzer, INPUT_PULLDOWN);
    pinMode(buzz, OUTPUT);
    digitalWrite(buzz, LOW);
    Particle.subscribe("designingiot/s17/jadam125", myHandler, "36003a000347353138383138" );  //id for the particle


}
void myHandler(const char *event, const char *data)
{
    
}


void loop() {

 digitalWrite(D7, HIGH);
    
    if (data)
         digitalWrite(buzz, HIGH);
        refill = refill+1;
        Particle.publish("refill",String(refill)); //publishes to IFTTT to send text message and graph data
   delay(2000); //2 second delay
   digitalWrite(D7, LOW);
   
 if(digitalRead(buzzer) == HIGH)
        digitalWrite(buzz, LOW);  
        
     delay(1000);   
 
}

Credits

Jennifer Adams

1 project • 2 followers

Tyler Dollberg

1 project • 0 followers

Drink Alert!!! (Beverage Can Monitor)