Team IOT Project 23:

Jeremy Samson

•

Tyler Seward

•

Rohan Kelkar

Published December 4, 2023

MEGR 3171 - Group 23 Apartment Monitoring System

Mercury thermometers are lame, use a Photon Particle 2 instead.

IntermediateShowcase (no instructions)6 hours169

MEGR 3171 - Group 23 Apartment Monitoring System

Things used in this project

Hardware components

Particle Photon 2

ELEGOO Upgraded 37 in 1 Sensor Modules Kit V2.0

x1 photo resistor sensor, x1 digital temperature sensor, x1 flame sensor, and x1 LCD 1602 module

ELEGOO 3pcs MB-102 Breadboard 830 Point Solderless Prototype PCB Board Kit

x4 breadboards

SparkFun Beginner Parts Kit

x1 10k Trimpot

Software apps and online services

Particle Build Web IDE

Story

Why did you decide to make this project?

Let’s be really honest here, once in your life you may or may not have left the stove on before leaving the house and by the time you find out, it’s already too late, your house is gone. Or maybe, it’s feeling a little hot or cold in your room and you need that fan/heater to turn on. Maybe you’ve left one of the lights on in your house before. If you’re a forgetful person and want a reminder that lets you know if you’ve done any of these things, then let me tell you, our project does exactly that.

How does it work?

Our project is designed to record live readings of temperature, detect sources of light and detect the presence of a fire within about a two-foot proximity of the sensor. We used 3 particle photon 2’s for data processing and data transfer between the sensors, a photoresistor, digital temperature sensor to record temperature, and a flame sensor to detect the presence of a fire within the area. Each of these sensors is connected to a particle device and these devices read the data recorded by the sensors and share the data between each other by using the publish and subscribe cloud functions. The particles that are connected to sensors publish the data. This data is then displayed onto an LCD. The particle device that is connected to the LCD subscribes to the data being output by the other particle devices. Under the code section you can find the coding for each sensor and the LCD and under the schematics section you can find the circuit diagram for each component.

LCD

The LCD is wired to the particle device labeled womat_rushil. This particle device is the main component of the project in that it subscribes to the other two particle devices, and it displays the data.

Photo-resistor (Light Sensor)

The photo-resistor is connected to the particle device labeled galaxy eyes photon dragon. When a light is on the LCD displays the message, "Lights are on" and when there is no light the LCD displays the message, "Lights are off".

Digital Temperature Sensor

The digital temperature sensor is wired to the particle device labeled lawyer_Shaan. This sensor records the temperature of the area every 2 seconds and that temperature is displayed on the LCD.

Flame Sensor

The flame sensor is also wired to the particle device labeled lawyer_Shaan. This sensor can detect a fire within a two-foot proximity and to indicate this, a red light is lit up on the sensor. When a fire is present, the LCD also displays the message, "HOUSE IS ON FIRE! RUN!" and when there is no fire it displays the message, "House is not on fire".

Code

#include <math.h>
#define SERIESRESISTOR 2500
#define NOMINAL_RESISTANCE 10000
#define NOMINAL_TEMPERATURE 25
#define BCOEFFICIENT 3950

int flamePin = A0;
int flameLED = D3;

int tempPin = A1;
int tempLED = D5;
int flame;
void setup()
{
    Serial.begin(9600);

    pinMode(flamePin, INPUT);
    pinMode(flameLED, OUTPUT);

    pinMode(tempPin, INPUT);
    pinMode(tempLED, OUTPUT);

    Particle.subscribe("Group23_IOT_Project", combinedHandler);
}

void loop()
{
    // Flame Sensor
    int flameValue = digitalRead(flamePin);

    if (flameValue == HIGH)
    {
        digitalWrite(flameLED, HIGH);
        flame=1;
    }
    else
    {
        digitalWrite(flameLED, LOW);
        flame=0;
    }
    flame = flameValue;
    Particle.publish("Flame_Status", String(flame), PUBLIC);

    // Temperature Sensor
    float tempADC = analogRead(tempPin);
    float tempResistance = (1023 / tempADC) - 1;
    tempResistance = SERIESRESISTOR / tempResistance;

    float steinhart = tempResistance / NOMINAL_RESISTANCE;
    steinhart = log(steinhart);
    steinhart = (steinhart / BCOEFFICIENT);
    steinhart += (1.0 / (NOMINAL_TEMPERATURE + 273.15));
    steinhart = 1.0 / steinhart;
    steinhart -= 273.15;

    Serial.print("Temperature: ");
    Serial.println(steinhart);

    Particle.publish("Temperature", String(steinhart), PRIVATE);

    delay(5000);
}

void combinedHandler(const char *event, const char *data)
{
    flame = atoi(data);

}

#include <Particle.h> // Include this line
#include <Adafruit_DHT.h>
#include <LiquidCrystal.h>
#define DHTPIN D6
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal lcd(5, 4, 3, 2, 1, 0);

int flame;
int resistance;
int steinhart;

void setup() {
    lcd.begin(16, 2);
    
}

void loop() {
    delay(5000);
    Particle.publish("Group 23 IOT project", PUBLIC);
    
    lcd.setCursor(13,1);
    Particle.subscribe("Temperature", steinhartHandler);
    
    delay(2000);
    lcd.clear();

    Particle.subscribe("Flame_Status", flameHandler);
    
    lcd.clear();

    if (flame == 1)
    {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("House is not on");
        lcd.setCursor(0,1);
        lcd.print("fire.");
    } else if (flame == 0) 
    {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("HOUSE ON FIRE!");
        lcd.setCursor(0,1);
        lcd.print("RUN!");
    }
    delay(3000);
    lcd.clear();
    
    Particle.subscribe("resistance_data", resistanceHandler);
    
    if (resistance == 0){
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Lights are off");
    } else if (resistance == 1){
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Lights are on");
    }
    delay(3000);
}
void steinhartHandler(const char *event, const char *data){
    steinhart = atoi(data);
    lcd.setCursor(14, 1);
    lcd.print(data);
    lcd.setCursor(16, 1);
    lcd.print("C     ");

    digitalWrite(D7, HIGH);
    delay(2000);
    digitalWrite(D7, LOW);
    delay(500);
}
void flameHandler(const char *event, const char *data){
    flame = atoi(data);
}
void resistanceHandler(const char *event, const char *data){
    resistance = atoi(data);
}

const int photoResistorPin = A1;

int resistance;

void setup(){
  Serial.begin(9600);
  Particle.subscribe("Group 23 IOT project", standard);
}

void loop(){
  int photoResistorValue = analogRead(photoResistorPin);

  float resistance = (10000.0 * (4095.0 - photoResistorValue)) / photoResistorValue;

  Serial.print("Resistance: ");
  Serial.print(resistance);
  Serial.println(" ohms");
  if(resistance>700){
        resistance=1;
    }
    else{
        resistance=0;
    }
  Particle.publish("resistance_data", String(resistance), PUBLIC);

  delay(5000);  
}
void standard(const char *event, const char *data){
    digitalWrite(A0,HIGH);
    delay(2000);
    digitalWrite(A0,LOW);
    delay(500);
}
void resistanceHandler(const char *event, const char *data){
    resistance = atoi(data);
}

MEGR 3171 - Group 23 Apartment Monitoring System

Things used in this project

Hardware components

Software apps and online services

Story

Why did you decide to make this project?

How does it work?

LCD

Photo-resistor (Light Sensor)

Digital Temperature Sensor

Flame Sensor

Schematics

Photo Resistor Sensor Circuit Diagram

LCD Circuit Diagram

Flame and Digital Temperature Sensors Circuit Diagram

Temperature vs. Time Data from Digital Temp Sensor

Code

Flame Sensor & Digital Temperature Code

LCD Code

Photoresistor Code

Credits

Jeremy Samson

Tyler Seward

Rohan Kelkar

Comments

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MEGR 3171 - Group 23 Apartment Monitoring System

MEGR 3171 - Group 23 Apartment Monitoring System

Things used in this project

Hardware components

Software apps and online services

Story

Why did you decide to make this project?

How does it work?

LCD

Photo-resistor (Light Sensor)

Digital Temperature Sensor

Flame Sensor

Schematics

Photo Resistor Sensor Circuit Diagram

LCD Circuit Diagram

Flame and Digital Temperature Sensors Circuit Diagram

Temperature vs. Time Data from Digital Temp Sensor

Code

Flame Sensor & Digital Temperature Code

LCD Code

Photoresistor Code

Credits

Jeremy Samson

Tyler Seward

Rohan Kelkar

Comments

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