Door Lock System Using Arduino

The electronic lock is controlled using an spdt single pole double throw type relay which is a 12v relay.

Door lock system using arduino.

The simply compile it then finally upload it to the atmega328 microcontroller. Arduino door lock system with password using keypad electromagnetic lock and lcd. At first arduino is initialized in stand by mode where it asks the user to enter the password to unlock the door. After that turn on the bluetooth of your phone and then pair the bluetooth module with your phone.

For locking we use the digitalmultiwrite method from library to write high value to d0 and low value to d3. Arduino and gsm based door lock system circuit diagram. It just makes the system a little more convenient. Testing the fingerprint door lock using arduino project after installing the apk and connecting the hardware as per the circuit diagram connect the arduino to the laptop and upload the code remove the tx rx pins before uploading the code.

Download the library for keypad h from below. In this password security lock system using arduino project we have defined the default password in arduino as 1234. The arduino code supports multiple passwords. Similarly for unlocking we ll write low value to d0 and high value to d3.

The code for password based door lock security system using arduino keypad is given below. You can simply copy paste the code using arduino ide. Connect first six pins of keypad to analog pins a0 a5 of arduino and remaining two to digital pins 3 and 2. For connecting the keypad with the arduino we are using both analog and digital pins.

From inside you can press the reset pin on the arduino to lock or unlock the door. Simple code for arduino keypad door lock systems for beginners. Door lock security system with arduino include keypad h keypad library for keypad interfacing include liquidcrystal h library for lcd interfacing include servo h library for servo motor include string h define buzzer 20 defining pin for buzzer. Digital door lock using arduino circuit diagram.

This will signal the arduino to unlock the door. The circuit diagram as you can see is very simple. Hello you all i ve been working on a lock system for a while i started looking for some codes to use in my project but unfortunately i found a lot of complex ones and most of them have some fails especially when they use pointers you can try the. Whether from the inside or outside whenever the door is locked the leds turn red and whenever the door is unlocked they turn green.

First of all we will make the connection to the 4 4 keypad. If the correct finger is placed the leds cheerfully light up green the door unlocks and the display welcomes you in. We used analog pins since we need more that 14 digitals pins for this project. We ll discuss the arduino code and circuit design later in this tutorial.

However you can change this via coding later.