Published November 18, 2018

Illuminate | IoT Project Team 2

Imagine opening your door and the room immediately illuminates to greet you or to inform you of any other visitors.

IntermediateFull instructions provided10 hours562

Things used in this project

Hardware components

Particle Photon

ControlEverything.com 4-CHANNEL RELAY CONTROLLER FOR I2C

LED Light Strip

Magnetic Door Switch

3 mm LED: Green

SparkFun Pushbutton switch 12mm

Portable Battery Pack

Male/Female Jumper Wires

Male/Male Jumper Wires

Software apps and online services

Particle Build Web IDE

IFTTT Maker service

Google Sheets

Story

For our MEGR 3171 class, we were tasked to design and implement an IoT project to solve a problem. For our project, we had three members and therefore had to incorporate a particle photon per member. The photon devices also needed to have 2-way communication with each other. Our group decided to create a motion triggered LED light strip that illuminates the room whenever the door is opened.

Our three photons are named by their correlating action. The door, lights, and remote photons. The door photon has a magnetic sensor wired to it, so when the door opens or closes, there is a voltage change that's measured to determine what state it is in. When the door opens, the door photon will publish a door status "open". This published event triggers the light photon to activate the LED lights because it is subscribed to this event. Our remote photon acts as master switch to turn off the lights. When the remote photon publishes an event called "lightsout123456", the light photon shuts off the lights because it is subscribed to that event.

Door Photon & Magnetic Sensors

Light Photon & Relay

LED Light Strip

Remote Photon (Off Switch)

For our bi-communication, when the door opens, and the lights turns on, there is a LED light attached to the remote photon that lights up as well. When the button on the remote photon is pushed down and the lights turn off, the LED light on the remote also turns off. This is displayed in the video.

IFTTT applets were used to send an email whenever the bedroom door was opened. This acts like a monitoring system, because whenever my door is opened and lights are triggered I will receive notifications for both events.

IFTTT Event Notifications

We also used IFTTT applets to capture real time data for every time the door was opened. This data is graphed in the following google sheet. Every time the door opens, data is recorded as 1 in the graph. Attached is the link for real time data.

https://docs.google.com/spreadsheets/d/18Gr4-4pdb822rohcmCIgrnbz6ssQ_TFXAb-B28ao9z0/edit?usp=sharing

Real time Google Sheet Event

Code

door_sensor = A0;
bool contactBroken = false; // This flag will be used to mark if we have a new status or not. We will use it in the loop.

void setup() {
 pinMode(door_sensor,INPUT);  // Our door sensor pin is input (reading the sensor)

}
void loop() {
/* In this loop function, we're going to check to see if the contact has been broken.
  When the status of the sensor changes, we'll send a Particle.publish() to the cloud
  so that if we want to, we can check from other devices when the door is open or closed. */
  
  if (analogRead(door_sensor) >4000 ) {
  
  delay(1000);
   
    if (contactBroken==true) {
        // If the contact was broken before, then this is a new status.
        // We will send a publish to the cloud .
    
         // Send a publish to your devices...
        Particle.publish("DoorStatus789456","closed");
         // Finally, set the flag to reflect the current status of the sensor.
        contactBroken=false;
    }
    else {
        // Otherwise, this isn't a new status, and we don't have to do anything.
    }
  }
  else {
      // If you are below the threshold, the contact is probably broken.
     delay(1000);
     if (contactBroken==false) {
          
           // Send a publish...
        Particle.publish("DoorStatus789456","open");
        
         // Finally, set the flag to reflect the current status of the sensor.
        contactBroken=true;
      }
     
  }

}

int Light_switch = D0;
int Light_1 = D1;
int Light_2 = D2;
int Light_3 = D3;
int led =D7;


void setup() {
 pinMode(Light_switch,OUTPUT);  
 pinMode(Light_1,OUTPUT);
 pinMode(Light_2,OUTPUT);
 pinMode(Light_3,OUTPUT);
 pinMode(led,OUTPUT);
 
digitalWrite(Light_switch,1);
digitalWrite(Light_1,1);
digitalWrite(Light_2,1);
digitalWrite(Light_3,1);
 
 Particle.subscribe("DoorStatus789456", myHandler);
 Particle.subscribe("offbutton123456", shutdown);
}

void loop (){
delay(1000);

}
void myHandler(const char *event, const char *data)
{
   digitalWrite(led,HIGH);
   
  if (strcmp(data,"open")==0) {
    // if the door is open, turn LED's on
    digitalWrite(Light_switch,0);
    digitalWrite(Light_1,0);
    digitalWrite(Light_2,0);
    digitalWrite(Light_3,0);
    
     Particle.publish("RemoteON123456","ON");
    
  }
  
}
void shutdown(const char *event, const char *data)
{
    digitalWrite(Light_switch,1);
    digitalWrite(Light_1,1);
    digitalWrite(Light_2,1);
    digitalWrite(Light_3,1);
    
}

int offbutton = D3;
int led = D7;
int greenled = D6;

void setup() {
 pinMode(offbutton,INPUT_PULLDOWN);  
 pinMode(led,OUTPUT);
 pinMode(greenled,OUTPUT);

Particle.subscribe("RemoteON123456", ledON);

}
void loop() {
/* In this loop function, we're going to check to see if the contact has been broken.
  When the status of the sensor changes, we'll send a Particle.publish() to the cloud
  so that if we want to, we can check from other devices when the door is open or closed. */
  
if (digitalRead(offbutton)==1)
{
    delay(500);
    Particle.publish("offbutton123456","Lights Out");
    digitalWrite(led,1);
    delay(500);
    digitalWrite(greenled,0);
}

else (digitalRead(offbutton)==0);

 {
     digitalWrite(led,0);
 }
}
   void ledON(const char *event, const char *data)
{
   digitalWrite(greenled,HIGH);
}

Credits

Zac Johnson

1 project • 0 followers

UNCC ; Mechanical Engineering Student ; Motorsports Concentration

Thanks to Stephen Cardell and Chaitanya Pawar.

Illuminate | IoT Project Team 2

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Lights & Relay

Remote

Door Switch

Code

Door Photon Code

Light Photon Code

Remote Photon Code

Credits

Zac Johnson

Comments

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Illuminate | IoT Project Team 2

Illuminate | IoT Project Team 2

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Lights & Relay

Remote

Door Switch

Code

Door Photon Code

Light Photon Code

Remote Photon Code

Credits

Zac Johnson

Comments

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