https://github.com/eitvisa/stm32-electronic-checkers-game

Interactive LED checkers game built with STM32 microcontroller and Bluetooth connectivity.
https://github.com/eitvisa/stm32-electronic-checkers-game

bluetooth c-language checkers electronics embedded hc-05 led microcontroller stm32

Last synced: 7 months ago
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Interactive LED checkers game built with STM32 microcontroller and Bluetooth connectivity.

• Host: GitHub
• URL: https://github.com/eitvisa/stm32-electronic-checkers-game
• Owner: EitvisA
• License: mit
• Created: 2025-10-03T09:37:42.000Z (9 months ago)
• Default Branch: main
• Last Pushed: 2025-10-27T22:14:39.000Z (8 months ago)
• Last Synced: 2025-10-28T00:13:40.339Z (8 months ago)
• Topics: bluetooth, c-language, checkers, electronics, embedded, hc-05, led, microcontroller, stm32
• Language: C
• Homepage:
• Size: 14.6 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# stm32-electronic-checkers-game

Interactive LED checkers game built with STM32 microcontroller and Bluetooth connectivity.

## Features

- Full LED-based game board representing two players (red and blue LEDs)

- Real-time piece movement: LEDs turn on, off, and blink according to game state

- Bluetooth connectivity via HC-05 modules for smartphone control

- Powered by a Lithium-ion battery

- Modular and maintainable C code structure

## Technical Overview

- **Microcontroller:** STM32F446 Nucleo

- **Language:** C

- **Communication:** 

  - STM32 ↔ HC-05 Bluetooth module via UART with DMA

  - HC-05 ↔ Smartphone via standard Bluetooth serial

- **LED Control:** Direct GPIO manipulation

- **Core Code Structure:**

  - `main.c` → game logic, Bluetooth input, LED updates

  - `LED_control.c/.h` → controls LED states: on, off, blink, and color detection

## How It Works

1. **Initial Setup:** LEDs are initialized to display the starting board state (red on one side, blue on the other)

2. **Player Move:** Players send the **LED number** of the piece they want to move from their smartphone using a **Bluetooth serial terminal app**. Numbers are sent as HEX values corresponding to board positions

3. **LED Update:** The STM32 receives the LED number via UART and updates the LEDs:

   - Blink the selected piece.

   - Move it to the new position.

   - Turn off any captured opponent pieces.

4. **Next Turn:** The system resets and waits for the next LED number

## Hardware

- **PCB:** Blank PCB with soldered LEDs

- **Microcontroller:** STM32F446 Nucleo

- **Power:** Lithium-ion battery

- **Bluetooth:** Two HC-05 modules

## Future Improvements

- Add a scoring system to track player points

- Implement automatic rule checking (valid moves, captures)

- Improve mobile interface for sending LED commands

- Optimize LED blinking animations for smoother visual effect

- Redesign hardware: replace direct GPIO LED control with shift registers for better scalability and simplified wiring

## Game board