pi-score-counter

Raspberry Pi score counter for games.

How it works?

• A Python script records every button action with the GPIO implementation from the Raspberry Pi.
• Every action is saved in a SQLite database
• A web interface will connect to that database to offer a UI to the program

What does it look like?

Player selection screen

Statistics screen (shown after 30 seconds of inactivity)

In-game screen

In-game screen (game over)

GPIO Inputs

• Player 1 - Button A (GPIO23) was GPIO18 before 1.4.0
• Player 1 - Button B (GPIO24)
• Player 2 - Button A (GPIO22)
• Player 2 - Button B (GPIO17)
• Reset button (GPIO25)

GPIO Electrical Diagram

Buttons

NFC Reader

Use of buttons

• Always
  • Reset button: Resets the system to the home page
• Before a game
  • Button A - Change player
  • Button B - Select player
• During a game
  • Button A - Increase score
  • Button B - Decrease score

Game flow

• Each players selects his name from the list of available players by using the A and B buttons (data will be prefilled)
• When every players has selected his name, the game starts and the score is 0-0
• By using buttons A or B, the players can make increase/decrease their score
• When the game is over, the system returns to the home page when any button is pressed, and the flows restarts
• Any time that the Reset button is pressed, the system returns to the home page
• If the score is 0-0 and a decrease button is pressed, the system will return to main menu and cancel the current game

Default config and rules

• The default config is based on Table Tennis Canada rules
• Every games are 11 points
• If there is an equality at 10-10, the game will finish when the difference of points is 2

Statistics

• Every game is saved in the database with the score
• An ELO based ranking algorithm is implemented to assign a rank to each player
• A leaderboard is also shown after 1 minute of inactivity while in the main menu
• 15 games are required to be ranked

Seasons (new in 1.3.0)

• Season have been implemented in web/js/season.js
• You can change the variables values in this file to enabled season features
• The statistics will be computed within the range of the given dates for the active season
• Only 5 games are required to be ranked during a season

Player selection with NFC (new in 1.4.0)

• You can now select a player by using a NFC chip
• You simply have to write the player's id on the NFC chip with the game/create_player_chip.py script (player's id in arguments)
  • sudo python create_player_chip.py [PLAYER_ID]
• To setup the NFC Reader, please the section NFC Reader installation

Installation

• Simply run install.sh in the install directory
• Make sure pigpio is installed on your Pi (should already be installed)
• Run whereis pigpiod and add it to your crontab at reboot
  • Example: @reboot /usr/bin/pigpiod
• If you want to install the NFC reader to choose players faster, please read the next section: NFC Reader installation

NFC Reader installation (new in 1.4.0)

GO TRONIC manual gives these instruction to make the NFC Reader work.
See more info at https://www.gotronic.fr/pj2-sbc-rfid-rc522-fr-1439.pdf
For the wiring, please read the section GPIO Electrical Diagram

On a Raspberry Pi, you should already have this installed:

• Run sudo apt-get install python-pip python-dev build-essential
• Run sudo pip install RPi.GPIO
• Run sudo apt-get install python-imaging

Then follow these steps to enable SPI

• Run sudo raspi-config
• Search for the option Enable/Disable automatic loading of SPI kernel module and enable it (name and menu can differ from a Pi to another)
• Reboot your Pi

After reboot, follow these steps:

• Go in the game/SPI-Py folder
• Run sudo python3 setup.py install

Execution

• Run start.sh that was copied in /home/pi/Desktop

Update

• Run update.sh in the install folder to update the code directly on your Raspberry Pi