Team iot group 36: Emma Hardman, Jake Shattuck, Will Birchfield

Published April 22, 2022

Automated Door Lock- IOT group 36

An easy way to unlock your door by simply standing near it or using your phone or a button.

IntermediateFull instructions provided54

Things used in this project

Hardware components

SparkFun Ultrasonic Sensor - HC-SR04

SG90 Micro-servo motor

SparkFun Pushbutton switch 12mm

Breadboard (generic)

Particle Argon

Software apps and online services

IFTTT Maker service

Hand tools and fabrication machines

Drill / Driver, Cordless

Story

Tired of forgetting your keys and accidently getting locked out of your house? Well our team created a way to make sure that doesn't happen again. With the use of three argons, an ultrasonic sensor, a button, and the use of the phone's GPS service, we put together a new door-lock system.

The phone publishes an event for when you walk up to your door, where it signals the motor to unlock the door for four minutes, and then automatically lock back up. The ultrasonic sensor senses when the door is being opened, which then sends a notification to your phone that someone is opening your door. A button is also used inside of the house to unlock from it for people on the outside.

Schematic of how the door lock system operates

ultra sonic sensor and circuit

Ultrasonic ranger data for door locking

push button and circuit

servo motor and door lock circuit system

Code

Servo myservo;  // create servo object to control a servo
                

void setup()
{
  myservo.attach(A2);  // attaches the servo on the A2 pin to the servo object
  
myservo.write(10);
}

void loop()
{
Particle.subscribe("LockActivation1234", DoorUnlock);
  // Subscribe will listen for the event and, when it finds it, will run the function
  delay(1000);
Particle.subscribe("button", DoorUnlock);
  delay(1000);
}

void DoorUnlock(const char *event, const char *data)
{
  /* Particle.subscribe handlers are void functions, which means they don't return anything.
  They take two variables-- the name of your event, and any data that goes along with your event. */
  
    {
    myservo.write(180); 
    Particle.publish("DoorStatus","Open");
    delay(240000);
    myservo.write(10); 
    delay(1000);
    Particle.publish("TaskStatus1234","Completed");
  }
 
}

/*
 * UltrasonicDisplayOnTerm.ino
 * Example sketch for ultrasonic ranger
 *
 * Copyright (c) 2012 seeed technology inc.
 * Website    : www.seeed.cc
 * Author     : LG, FrankieChu
 * Create Time: Jan 17,2013
 * Change Log :
 *
 * The MIT License (MIT)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */


/***************************************************************************/
//	Function: Measure the distance to obstacles in front and print the distance
//			  value to the serial terminal.The measured distance is from
//			  the range 0 to 400cm(157 inches).
//	Hardware: Grove - Ultrasonic Ranger
//	Arduino IDE: Arduino-1.0
/*****************************************************************************/

#include "Grove-Ultrasonic-Ranger.h"

int delaystart = 0;
int enable = 1;
int pub = 0;	
long RangeInInches;
long RangeInCentimeters;
Ultrasonic ultrasonic(7);
void setup()
{
	Serial.begin(9600);
	Particle.subscribe("DoorStatus", DoorOpen);
}
void loop()
{
	
	RangeInCentimeters = ultrasonic.MeasureInCentimeters();
	if (RangeInCentimeters < 100) {
	    pub = 1;
	}
	if ((delaystart + 240000) > millis()){
	    enable = 1;
	}
	if ((pub == 1) && (enable == 1)) {
	    Particle.publish("Doordetect","open");
	    pub = 0;
	}
	delay(250);
}
void DoorOpen(const char *event, const char *data)
{
    pub = 0;
    delaystart = millis();
    enable = 0;
    
}

Automated Door Lock- IOT group 36

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

CIRCUIT DIAGRAMS

ULTRASONIC SENSOR DOOR LOCK/UNLOCK DATA

Code

SERVO CODE

BUTTON CODE

SONIC RANGER FINDER CODE

Credits

Emma Hardman

Jake Shattuck

Will Birchfield

Comments

Embed the widget on your own site

Automated Door Lock- IOT group 36

Automated Door Lock- IOT group 36

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

CIRCUIT DIAGRAMS

ULTRASONIC SENSOR DOOR LOCK/UNLOCK DATA

Code

SERVO CODE

BUTTON CODE

SONIC RANGER FINDER CODE

Credits

Emma Hardman

Jake Shattuck

Will Birchfield

Comments

Related tags