Secured Fan Speed Control Based on FreeRTOS

Project Overview

This project implements a Secured Fan Speed Control System using FreeRTOS for multitasking. The user enters a password via UART, and once authenticated, the fan speed is controlled based on temperature readings from an LM35 temperature sensor. A buzzer alerts the user in case of an incorrect password, while an LED confirms correct password entry. FreeRTOS manages task scheduling for password authentication, fan control, and real-time monitoring.

Key components include:

• Microcontroller: ATMega32
• Fan Motor: Speed regulated based on temperature readings
• Temperature Sensor: LM35
• Communication: UART for password input
• Actuators: LEDs (for correct password indication), Buzzer (for wrong password alert)

Features

• Multitasking with FreeRTOS: Efficient task scheduling for password authentication, temperature reading, fan speed control, and status indication.
• Password Authentication: The user enters a password via UART. A buzzer sounds for incorrect passwords, while an LED lights up for correct password entry.
• Temperature-Based Fan Speed Control: After authentication, the fan speed adjusts automatically based on the temperature detected by the LM35 sensor.
• Simulated Setup: Entire system is simulated using Proteus for testing and demonstration.

Hardware Components

• ATMega32 Microcontroller
• LM35 Temperature Sensor: Reads ambient temperature to control fan speed.
• Fan Motor: Adjusts speed based on temperature readings.
• LEDs: Indicate correct password entry.
• Buzzer: Alerts the user in case of a wrong password.
• UART: Handles password transmission for security.

Software Components

• FreeRTOS: Real-Time Operating System for task management and scheduling.
• Proteus Simulation: Used to simulate the entire system before hardware implementation.
• Embedded C: Programmed using Embedded C language for the ATMega32.

Simulation Video

You can view the simulation video of the system in action here.

Source Code Structure

main.c

This file contains the main entry point of the system. It initializes the FreeRTOS environment, sets up the hardware, and starts the task scheduler.

TaskHandler.c

This file contains the task definitions and handlers for various components in the system, including:

• Task for password authentication via UART.
• Task for reading temperature from the LM35 sensor.
• Task for controlling fan speed based on temperature.
• Task for handling the buzzer and LED indicators.

TaskHandler.h

This header file declares the task functions and shared variables used across tasks.

Setup and Installation

1. Clone the repository:

   git clone https://github.com/Esraa-alii/Secured-Fan-Speed-Control-Based-on-FreeRTOS.git

2. Proteus Simulation:
   • Open the provided Proteus simulation file.
   • Ensure all necessary libraries are installed.
3. Code:
   • Compile and upload the code to the ATMega32 microcontroller.
4. Run Simulation:
   • Launch the Proteus simulation to visualize the working system.

Usage

• Password Authentication: Use UART to send a password. A buzzer will sound for incorrect entries, and an LED will light up for correct entries.
• Temperature-Based Fan Control: After successful authentication, the fan speed adjusts automatically based on the temperature detected by the LM35 sensor.
• Status Indication: LEDs and the buzzer provide real-time feedback on password entry.
• The system handles tasks concurrently using FreeRTOS.

Future Enhancements

• Add remote control via Wi-Fi or Bluetooth.
• Integrate a mobile app for temperature monitoring and fan control.
• Expand the system to handle additional home appliances.

License

This project is licensed under the MIT License. See the LICENSE file for more details.