Published February 28, 2022

Arduino Controlled Servo Door Lock

Lock and unlock your door through your smart phone.

BeginnerFull instructions provided6,562

Things used in this project

Hardware components

Arduino UNO

HC-05 Bluetooth Module

SG90 Micro-servo motor

Breadboard (generic)

Jumper wires (generic)

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Paper clip

Tape, Double Sided

Latch

Story

About:

The goal of this project is to lock and unlock your door through the convenience of your smart phone. This project requires beginner level programming skill. It is a fun and interesting project.

How It Works:

When the Bluetooth Module receives a certain value(0 or 90) from the smart phone the Arduino gives a signal to rotate so that the angle of the servo is equal to the respective value which opens or closes the latch.

Instructions:

first connect all the components as mentioned in the circuit diagram given bellow. Then using the paper clip attach the servo to the latch like so.

Disconnect the RX and TX pins and upload the sketch. Connect the RX and TX pins again.

Open the application mentioned below and connect the bluetooth module with your smart phone.Then go to the buttons and slider section and go to settings and change the values of any 2 button to '0' and '90' respectively. The 2 respective buttons will lock and unlock the latch.

Note:

For some reason I was not able to add the mobile application in the software section of the page required for the project. Enter play store and download this app for the project. (Arduino Bluetooth Control)

Code

Arduino Code for the project

// including the servo library  
#include <Servo.h> 
// declaring and defining myservo
Servo myservo; 
// this variable holds the values that the servo will move
int Position ;

void setup() 
{
  // myservo is connected to PWM pin 9
  myservo.attach(9);
//settin up the baud rate for the bluetooth module and mobile to communicate
  Serial.begin(9600);
}

void loop()
{
  if (Serial.available() > 0)
  {
    //if the values recieved are equal to 0 or 90 the sero will move to the respective angl
    Position = Serial.read();
    if (Position == 0 || Position == 90) {
      myservo.write(Position);
    }
  }
}

Credits

raghavdaboss

1 project • 1 follower

Arduino Controlled Servo Door Lock

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

About:

How It Works:

Instructions:

Note:

Schematics

circuit diagram

Code

Arduino Code for the project

Credits

raghavdaboss

Comments

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Arduino Controlled Servo Door Lock

Arduino Controlled Servo Door Lock

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

About:

How It Works:

Instructions:

Note:

Schematics

circuit diagram

Code

Arduino Code for the project

Credits

raghavdaboss

Comments

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