The main objective of this project was to create a smaller version of commercial password based safes in the market. This is a simple project with keypad, servo and lcd interfacing. The basic idea behind the safe lock is to use a keypad to enter a passcode, which is then checked by the Arduino Uno. If the passcode is correct, the Arduino will activate a servo motor to unlock the safe. Additionally, the safe lock can use an LED to indicate the status of the lock, and a 16×2 LCD to display messages and prompts to the user.

The locker system is a secure and automated storage solution that employs an Arduino Uno R3 microcontroller board along with various components to provide controlled access to a physical compartment. +———+ +—————–+

+———+ | |

                              |  +-----------+  |
                              |  | LCD       |  |
                              |  +-----------+  |
                              |  |           |  |
                              |  |    LED    |  |
                              |  |           |  |
                              |  +-----------+  |
                              |  |           |  |
                              |  | Servo     |  |
                              |  | Motor     |  |
                              |  |           |  |
                              |  +-----------+  |
                              |  |           |  |
                              |  |   Buzzer  |  |
                              |  |           |  |
                              |  +-----------+  |
                              +-----------------+

At the core of the system is the Arduino Uno R3, which serves as the control center. It receives input from a keypad, allowing users to enter a unique code for authentication. The keypad acts as the primary interface for interaction with the locker system, enabling users to input commands and access their belongings securely.

To provide visual feedback and information, an LCD display is integrated into the system. The LCD display is connected to the Arduino board, presenting prompts, status messages, and instructions to guide users throughout the authentication and access process. It enhances the user experience by providing clear and concise information.

Once the user enters the correct code on the keypad, the Arduino board triggers a servo motor. The servo motor is mechanically connected to the locker mechanism and operates to unlock or lock the door, granting or restricting access to the storage compartment. The servo motor ensures precise control and reliable operation of the locker system.

To offer audio feedback and notifications, a buzzer is integrated into the system. The buzzer produces distinct sounds or tones to indicate successful authentication, access denied events, or other relevant events. This audio feedback enhances user feedback and serves as an additional layer of confirmation during the interaction with the locker system.

By leveraging the capabilities of the Arduino Uno R3 and the various components, this locker system provides a reliable, user-friendly, and secure storage solution. The Arduino board acts as the brain of the system, processing user input, managing the authentication process, controlling the servo motor, LCD display, and buzzer to ensure seamless and controlled access to the locker.

Initially, I defined the necessary pins, sensors, buzzer, and lcd i2c display for the project. These components are essential for its functionality. In the setup and loop functions of the Arduino code, I implemented the core features of the project.

Throughout the development process, I utilized the Arduino IDE as my primary software environment. It provided a convenient platform for me to write and upload code to the Arduino board.

The key libraries I used in this project were as follows:

Wire.h: I used this library for I2C communication, which is a common protocol for interacting with various devices, such as the OLED display used in this project. It enabled straightforward communication between the Arduino and the display module.

Keypad.h: The Keypad library is utilized for interfacing with the keypad component. It provides functions and methods to easily read the input from the keypad, allowing users to enter their access code. The library handles the scanning of the keypad matrix and provides a convenient interface to retrieve the pressed key.

Servo.h: The Servo library enables control of the servomotor component. It provides functions to set the angle or position of the servo motor, allowing precise control over its movement. By utilizing this library, the Arduino can accurately position the servomotor to lock or unlock the locker door based on the authentication result.

LiquidCrystal_I2C.h: The LiquidCrystal_I2C library is used to interface with the LCD display module through the I2C protocol. It simplifies the process of displaying information on the LCD by providing functions for writing text, setting the cursor position, and controlling the backlight. This library significantly reduces the complexity of communicating with the LCD module over I2C, making it easier to display relevant prompts, messages, and status updates to the users.

Care au fost rezultatele obţinute în urma realizării proiectului vostru.

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