TableTennisDisplay

Display for counting Table Tennis Matches

Components of the Display for Version 1 with 7-Segment LEDs

• esp8266 (Wemos D1 mini)

• Send data to LED Driver Shift Register TLC5916IN

• queries state of the buttons

• controlls the OLED display

• Can be controled by mobile phone (mqtt or http)

• implements counting behavieour

• Runs with 3.3V

• Powered by 12V Lead Acid Battery

• DC-DC Converter for 3.3V

• Seven Segment Displays

• 4 Big red LED common anode for the points

• 2 smaller green LED common kathode for the games

• LED Driver Shift Register TLC5916IN

• Datasheet

• Small OLED Display ssd1306 for umpire feedback and guidance

Components of the Display for Version 2 with Hub75 64x32 RGB Matrix

• esp8266 (Wemos D1 mini)

• Send data to RGB Matrix over i2c to HUB75 Controler

• queries state of the buttons

• controlls the OLED display

• implements counting behavieour

• Runs with 3.3V

• Powered by Stock 5V USB Powerbank

• HUB75 64x32 RGB Matrix

• HUB75 Controler: Arduino Mega

• Small OLED Display ssd1306 for umpire feedback and guidance

Components of the Display for Version 3 with Hub75 64x32 RGB Matrix

• esp8266 (Wemos D1 mini)

• Send data to RGB Matrix over i2c to HUB75 Controler

• queries state of the buttons

• controlls the OLED display

• implements counting behavieour

• Runs with 3.3V

• Powered by Stock 5V USB Powerbank

• HUB75 64x32 RGB Matrix

• HUB75 Controler: Custom made Atmega128 board

• See https://easyeda.com/thomas.gfuellner/TTDisplay64x32-LDrpmkwus

• Small OLED Display ssd1306 for umpire feedback and guidance

Counting behaviour

• Game is won with 2 points difference and with more than 10 points
• Indicate who has to serve - changes every 2 points or every 1 point if a player has more than 10 points
• Recognise game won
• write message on OLED
• increase game count
• after Button press: reset points and swap game display digits
• In the last game: swap side if one player reaches 5 points
• write message to OLED
• do swaping after pressing of a button

Setup

Menu right after powering the display on

• Hold back button on Power on: Join a existing Wifi or make a own AP
• Which side serves first

Menu after long button press

• Number of games to play:
• default: 3 games of 5
• 2 of 3
• 4 of 7
• 5 of 9
• LED Brightness

HTTP

Remote control over Wifi

• Press an hold right back button an power the Display on
• Choose own Network not connected to internet
• Join the Wifi Network created by the Display
• The Name is e.g. TTDisplay3
• Ip of Display is 192.168.4.1
• There are following actions:
• http://192.168.4.1:8080/
• http://192.168.4.1:8080/incrRight
• http://192.168.4.1:8080/incrLeft
• http://192.168.4.1:8080/decrRight
• http://192.168.4.1:8080/decrLeft
• http://192.168.4.1:8080/finishGame
• http://192.168.4.1:8080/swapSide
• http://192.168.4.1:8080/count
• http://192.168.4.1:8080/reset
• http://192.168.4.1:8080/rightServe
• http://192.168.4.1:8080/leftServe
• http://192.168.4.1:8080/setNames

Installation

• Arduino
• https://github.com/esp8266/Arduino with Boardmanager
• Boards manager link: http://arduino.esp8266.com/stable/package_esp8266com_index.json