Motion Sensor - UNCC MEGR 3171 Fall 2018

Ever wonder if there's someone in you house and possibly drinking your beer? Well then, we have the solution for you!

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Motion Sensor - UNCC MEGR 3171 Fall 2018

Things used in this project

Hardware components

Particle Photon

PIR Motion Sensor (generic)

Jumper wires (generic)

Adafruit SSD1306 OLED Display

USB-A to Micro-USB Cable

Breadboard (generic)

Software apps and online services

IFTTT Maker service

Particle

ThingSpeak API

Fritzing

Story

Background:

Ever wonder how busy your apartment is during the day, or how late your roommates stay up since they don’t have to live the engineering life? For these reasons we decided to create an IOT device that records how late your roommates stay up or when they come back from a late night out. This was a fun and easy project to do and is a good way to learn more about the world of IOT. Attached to our Hackster page are pictures, a video showing how this device works and the code for the device. Also on our page we have all the equipment needed to complete this project and the online programs we used. This project utilized two particle photons, a PIR motion sensor and an OLED screen.

How It Works- Motion Sensor:

The first photon, named MotionSensor, is connected to a PIR motion sensor. When the motion sensor detects motion, it turns on the built in Pin D7 light on the first photon. The first photon then publishes an event to the cloud that sends data to the second photon. The first photon also sends the data to a website called ThingSpeak. ThingSpeak allows us to plot a graph of the amount of motion detected within each hour over a long period of time. Below is the ThingSpeak graph displaying the motion recorded over this period of time. Also view the live graph here https://thingspeak.com/channels/578269.

Motion Detected per Hour over 36 hour period

How It Works- Motion Detected Display:

The second photon, named MotionDetected Display, is connected to an OLED screen. When the first photon publishes data to an event that this photon is subscribed to, “Motion Detected” will display on the OLED screen. The second photon will then publish an event turning the Pin D7 LED off on the first photon. This demonstrates the two photons are successfully communicating. The second photon also sends a notification/ text message to our phone through IFTTT that motion has been detected.

Motion Display (top) showing Motion Sensor (bottom) data

Demonstration of Project

Code

int PIRSensor = D0;
int led = D7;
int var=0;
int last=0;

void setup() 
{
    pinMode(led, OUTPUT);
    Particle.subscribe("LED-OFF", myHandler, "1c0032000e51353338363333");
 
}

void myHandler(const char *event, const char *data)
{
    digitalWrite(led, LOW);
}

void loop() {
    
    var=digitalRead(PIRSensor);
    if((digitalRead(PIRSensor) == HIGH) && (last == LOW))
    {
        digitalWrite(led, HIGH);
        
        // Get some data
        String data = String(var);
        // Trigger the integration
        Particle.publish("Motion", String(data), PRIVATE);
        Particle.publish("Motion-Detected", "Motion Detected In Living Room!");
    }

    last = var;
   
    if(digitalRead(PIRSensor) == LOW)
    {
        last = 0;
    }
    delay(10000);
}

// This #include statement was automatically added by the Particle IDE.
#include <Adafruit_SSD1306.h>

// use hardware SPI
#define OLED_DC     D3
#define OLED_CS     D4
#define OLED_RESET  D5
Adafruit_SSD1306 display(OLED_DC, OLED_RESET, OLED_CS);

int vari = 1;
int tim = 0;

void setup()   
{
    Particle.subscribe("Motion-Detected", myHandler, "230023000547363332363639");
}

void myHandler(const char *event, const char *data)
{
    // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
  display.begin(SSD1306_SWITCHCAPVCC);

  display.setTextSize(2);       // text size
  display.setTextColor(WHITE); // text color
  display.clearDisplay();
  display.println("MOTION");
  display.println("DETECTED");
  display.display();
  delay(5000);
  
  display.setCursor(0,0);
  display.clearDisplay();
  display.display();
  
  Particle.publish("Motion_occured", NULL, 60, PRIVATE);
  Particle.publish("text", NULL, 60, PRIVATE);
  delay(1000);
  Particle.publish("LED-OFF", "LED should turn off");
}

Credits

Ryan Dixon

1 project • 0 followers

Sam Johnson

1 project • 0 followers

Motion Sensor - UNCC MEGR 3171 Fall 2018