Custom Raspberry Pi Project

Overview

This project involves the development of a custom Linux image for the Raspberry Pi using Buildroot. The system integrates various hardware components and software functionalities to meet specific project requirements, including a GUI, temperature sensor, RGB LED device driver, and database management.

Key Features

• Custom Linux Image:

  • Created specifically for the project's needs using Buildroot.

• Multitasking and GUI Development:

  • Developed in C and C++ using PThreads as the multitasking API.
  • GUI implemented with QTCreator on a 5-inch touchscreen.

• Hardware Integration:

  • Integration of a temperature sensor.
  • Custom device driver for an RGB LED developed from scratch.

• Database Management:

  • SQLite used as an embedded database to store all stock information.

• Data Recording and Visualization:

  • ThingSpeak COTS utilized to record all sales performed by the scanner and represent them graphically.

Technical Specifications

• Operating System: Custom Linux image built with Buildroot.
• Programming Languages: C and C++.
• Multitasking API: PThreads.
• GUI Development Tool: QTCreator.
• Touchscreen: 5-inch display.
• Database: SQLite.
• Data Recording Tool: ThingSpeak COTS.

Methodology

1. Custom Linux Image:

   • Creation of a tailored Linux image using Buildroot to meet specific project requirements.

2. Software Development:

   • Multitasking:
     • Implementation using PThreads for efficient multitasking.
   • GUI:
     • Developed with QTCreator for a 5-inch touchscreen interface.

3. Hardware Integration:

   • Temperature Sensor:
     • Integration and data handling of the temperature sensor.
   • RGB LED:
     • Development of a custom device driver for the RGB LED.

4. Database Management:

   • SQLite:
     • Integration of SQLite as an embedded database for stock information management.

5. Data Recording and Visualization:

   • ThingSpeak COTS:
     • Utilization for recording and graphical representation of sales data.

Implementation

1. Custom Linux Image:

   • Built using Buildroot, tailored to the specific needs of the project.

2. Software Components:

   • Multitasking with PThreads:
     • Developed in C and C++ for efficient task management.
   • GUI Implementation:
     • Created using QTCreator for a 5-inch touchscreen display.

3. Hardware Components:

   • Temperature Sensor:
     • Integrated and programmed to provide real-time data.
   • RGB LED Driver:
     • Custom driver developed from scratch to control the RGB LED.

4. Database Integration:

   • SQLite:
     • Embedded database used to store and manage stock information.

5. Data Management:

   • ThingSpeak COTS:
     • Utilized to log sales data and generate graphical representations.

Conclusion

This Raspberry Pi project demonstrates the effective integration of custom software and hardware components tailored to specific requirements. With a custom-built Linux image, multitasking capabilities, a user-friendly GUI, and robust data management, this project serves as a comprehensive solution for the intended application. Detailed implementation and results can be found in the provided project report.