MEGR 3171 Team 47:

•

Jack Martin

Published November 24, 2021

3171 Door Sensor Project

This project uses two Particle Argon's, a magnetic switch, and an LED to signal when a door opens.

IntermediateShowcase (no instructions)108

Things used in this project

Hardware components

Reed Switch, Magnet Switch Set

LED (generic)

Resistor 1k ohm

Breadboard (generic)

Particle Argon

Story

Informational Video

We are solving the problem of how security systems detect if a door is open or closed. People would want our product for the information that it gives them being if a door is being accessed or not as well as a visual indicator of the occurrence. Our product also records what times the door opens or closes. Our solution is novel because it has been tested and it works. The fact that it works in real life is how it is characterized as realistic. Our newly acquired IOT skills allow us to come up with solutions to the project through research, understanding context, and trouble shooting the circuit and the code. These skills also allow us to connect two Particle Argons and have them communicate with one another.

Argon with Magnet Switch

This project consists of two argon kits. The first is connected to a magnetic switch, which is pictured above. We connected the positive voltage to D7 on the argon, and connected the ground node from the switch to the ground node of the argon kit. When the magnet disconnects from the sensor, the door is registered as open. When the magnet and the sensor are connected, the door reads as closed.

Argon with LED Light

The next component of the project is the second argon kit. It is connected to an LED light and grounded to the resistor (pictured above). We connected the light from A1 on the argon to the ground node on the breadboard. We then connected a resistor from the ground node of the breadboard to the ground port of the argon kit. This communicates with the magnetic switch so that the light turns on every time the switch disconnects.

Argon with Magnet Switch Connected to the Door

Code

void setup() { 
Particle.subscribe("team47_dooropen", doorsubscribeopen, MY_DEVICES);
Particle.subscribe("team47_doorclosed",doorsubscribeclosed, MY_DEVICES);
pinMode(A1, OUTPUT);
digitalWrite(A1, HIGH);
delay(500);
digitalWrite(A1,LOW);
}


void doorsubscribeopen(const char *event, const char *data) { 
  
    digitalWrite(A1, 1); 
    delay(10000);
    digitalWrite(A1, 0);
}
void doorsubscribeclosed(const char *event, const char *data) {  
  
    digitalWrite(A1, 0);  
    delay(10000);
    digitalWrite(A1, 1);
}

void setup() {
    pinMode(D7,INPUT_PULLUP); //configure D7 to input with an internal resistor pullup.
}

void loop() {
    if (digitalRead(D7) == TRUE){
        Particle.publish("team47_dooropen", "open");  //subscribe to door status
        delay(10000);
    }
    else {
    Particle.publish("team47_doorclosed", "closed");
    delay(10000);
}
}

Credits

Joel Hoffler

1 project • 0 followers

Contact

3171 Door Sensor Project

Things used in this project

Hardware components

Story

Schematics

LED Diagram

Magnet Switch Diagram

Flow Chart

Live Data

Code

LED Code

Magnet Switch Code

Credits

Joel Hoffler

Jack Martin

Comments

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3171 Door Sensor Project

3171 Door Sensor Project

Things used in this project

Hardware components

Story

Schematics

LED Diagram

Magnet Switch Diagram

Flow Chart

Live Data

Code

LED Code

Magnet Switch Code

Credits

Joel Hoffler

Jack Martin

Comments

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