Have you ever wondered if the cookies or other snacks in your jar have been taken by a roommate or friend without you knowing? Now with this cookie jar security system, you can see if and when your jar has been opened, and ward off thieves with warning lights. In order to build this system, two particle devices were used: a Photon and an Internet Button.
How it works: Internet Button
The Internet Button has an accelerometer build into it. This feature is used to detect the opening motion of the jar. When a tilt of the jar is detected of a higher value than 19 degrees, yellow LED lights on the outside of the Internet Button flash as a warning. Anytime the jar is opened at a degree higher than 25, red LEDs flash on the Internet Button and the event is published to the particle cloud. This event is then displayed on a Google sheet connected to your particle cloud.
Top View of Internet Button
How it works: LED
The second photon with the LED is wired to visually alert the owner if someone is opening the jar or has opened the jar. The LED photon is subscribed to the Internet Button via a particle.subscribe function. This means anytime the Internet Button detects a tilt of above 25 degrees it will tell the second photon to blink the LED.
LED Circuit
How it works: Graphing
When the jar is opened, this information is published to particle, which is then logged in this Google sheets page. This is logged through the app If This Then That (IFTTT) in which an applet was made to do this function. Below is an the current graph.
Use this with an internet button as a motion detector to keep your cookies safe! This code is for the photon that is on the lid of your cookie jar.
// This #include statement was automatically added by the Particle IDE.#include<InternetButton.h>#include"math.h"InternetButtonb=InternetButton();// Led Position initializationintledPos=0;voidsetup(){b.begin();Particle.variable("ledPos",ledPos);}voidloop(){//reads X,Y,Z values of AccelerometerintxValue=b.readX();intyValue=b.readY();intzValue=b.readZ();//displays green led for led closest to the groundb.ledOn(ledPos,0,0,0);ledPos=b.lowestLed();delay(0);b.ledOn(ledPos,0,255,0);delay(200);//article.publish("motion","Closed",PUBLIC);//Flashes all leds red and plays error noiseif(b.readY()<-25){if(b.readY()<=-25){b.playSong("G4,8,G4,8,G4,8,G4,8,G4,8,G4,8");b.allLedsOn(255,0,0);delay(250);b.allLedsOff();delay(250);b.allLedsOn(255,0,0);delay(250);b.allLedsOff();delay(250);b.allLedsOn(255,0,0);delay(350);b.allLedsOff();}if(b.readY()<25){Particle.publish("motion","Open",PUBLIC);delay(2000);}}// Flashes all leds Yellow for warningelseif(b.readY()<=-19){b.allLedsOn(230,130,0);delay(250);b.allLedsOff();delay(250);b.allLedsOn(230,130,0);delay(250);b.allLedsOff();}}
Stolen Cookie alarm!
C/C++
This is the code for the second photon. This code allows the second photo to receive data that the cookie jar was open from the other photon, and turns on led lights when the cookie jar is detected as open.
//Code for the recieving Photon that turns on the led lights when the cookie Jar is open.intled=D7;//Sets led as pin D7intled1=D0;//Sets led1 as pin D0 for extra Led.voidsetup(){pinMode(led,OUTPUT);//sets Led as an outputdigitalWrite(led,LOW);//Starts with led on lowpinMode(led1,OUTPUT);//Sets led1 as an outputdigitalWrite(led,LOW);//Starts with led1 on lowParticle.subscribe("motion",anything,"420024001451353432393433");//subscribes to the "motion" detected event from the internet button}voidanything(constchar*event,constchar*data){//Allows the photon to recieve data from the other photonif(strcmp(data,"Open")==0){digitalWrite(led,HIGH);digitalWrite(led1,HIGH);//Turns on both leds when Jar is opendelay(2000);digitalWrite(led,LOW);digitalWrite(led1,LOW);//Turns off both leds when Jar is closed}}voidloop(){}
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