Arduino “having11” Guy
Published © GPL3+

Virtual Arduino Tennis

Play tennis on a Neopixel matrix and an accelerometer with an Arduino! It's like Mario Tennis meets makers!

AdvancedFull instructions provided6 hours3,561

Things used in this project

Hardware components

Arduino Nano R3
Arduino Nano R3
×2
SparkFun 9DoF Sensor Stick
SparkFun 9DoF Sensor Stick
×1
Jumper wires (generic)
Jumper wires (generic)
×1
NeoPixel strip
NeoPixel strip
×1
HC-05
×1
9V battery (generic)
9V battery (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)

Story

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Schematics

Controller Schematic

Controller scematic bb cyf7rhpzmp

Matrix Schematic

Thumbnail bb 4tjx0di86l

Code

Matrix Code

C/C++
Goes on the Arduino attached to the matrix.
#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#include <Wire.h>
#include <EEPROM.h>

#define PIN 6 //Data pin for matrix
#define EEPROM_ADR 0x50 //The I2C address of the EEPROM
#define HS_ADR 0x02 //The address of the highscore byte in the EEPROM

#define NOTE_C1  33
#define SPKR_PIN 3

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(15, 10, PIN,
  NEO_MATRIX_BOTTOM     + NEO_MATRIX_LEFT +
  NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG,
  NEO_GRB            + NEO_KHZ800);
  
int ball_x = 7; //Ball's X coord
int ball_y = 2; //Ball's Y coord
int radius = 1; //Ball's radius
int r_incr = 1; //How much to increase radius by
bool isSwung = false; //Is the raquet swung
int ball_x_dir = 1; //Ball's X direction
int ball_y_dir = 1; //Ball's Y direction
bool isDirRight = true;
int score = 0; //The score of the current game
int COM_score = 0;
int highscore = 0; //The high score of all games
int framerate = 50; //How many ms between each frame
int serial_data;
String score_string = "";
uint16_t colors[] = {matrix.Color(255,0,0),matrix.Color(0,255,0),matrix.Color(150,200,0)};
int melody[] = {0};
int tempo[] = {0};
static unsigned long lastFrame = 0;

void setup(){
  Serial.begin(9600);
  matrix.begin();
  matrix.fillScreen(0);
  matrix.setTextColor(colors[1]);
  randomSeed(analogRead(A2));
  display_scores();
  highscore = read_HS();
  Serial.println(highscore,DEC);
  matrix.setCursor(0,1);
  matrix.print("HS: ");
  matrix.show();
  delay(1000);
  matrix.fillScreen(0);
  matrix.setCursor(0,1);
  matrix.print(highscore,DEC);
  matrix.show();
  delay(1000);
  score_string = "";
}

void loop(){
  if((lastFrame+framerate)< millis()){
    update_frame();
    lastFrame = millis();
  }
}

void update_frame(){
  serial_data = Serial.parseInt();
  if(serial_data){
    isSwung = true;
  }
  else if(!serial_data){
    isSwung = false;
  }
  if(ball_y >= 5 && ball_y < 7 && isSwung){
    if(isDirRight){
    ball_x_dir = -1;
    ball_y_dir = -1;
    }
    else if(!isDirRight){
      ball_x_dir = 1;
      ball_y_dir = -1;
    }
    r_incr = -1;
  }
  else if(ball_y >= 8){
    COM_score += 1;
    end_round();
    
  }
  else if(ball_y <= 2){
    isDirRight = !isDirRight;
    int randNum = random(4);
    Serial.println(randNum);
    if(randNum == 2){ //25% chance of COM missing
      score += 1;
      if(score > highscore){
      write_HS();
  }
      end_round;
    }
    else{
      if(isDirRight){
      ball_x_dir = 1;
      ball_y_dir = 1;
      }
      else if(!isDirRight){
        ball_x_dir = -1;
        ball_y_dir = 1;
      }
      r_incr = 1;
    }
  }
  ball_x += ball_x_dir;
  ball_y += ball_y_dir;
  radius += r_incr;
  matrix.fillScreen(0);
  matrix.fillCircle(ball_x,ball_y,radius,colors[2]);
  matrix.show();
}

void end_round(){
  
  if(COM_score >= 10){
    end_game();
  }
  isDirRight = true;
  r_incr = 1;
  ball_x_dir = 1;
  ball_y_dir = 1;
  ball_x = 7;
  ball_y = 2;
  radius = 1;
  display_scores();
  matrix.fillScreen(0);
  matrix.fillCircle(ball_x,ball_y,radius,colors[2]);
  matrix.show();
  
}

void end_game(){
  matrix.fillScreen(0);
  matrix.setCursor(0,1);
  matrix.setTextColor(colors[0]);
    matrix.drawLine(3,0,12,9,colors[0]);
    matrix.drawLine(11,0,2,9,colors[0]);
    matrix.show();
    delay(500);
  while(1){
  }
}

void display_scores(){
  matrix.fillScreen(0);
  matrix.setTextColor(colors[1]);
  matrix.setCursor(0,1);
  score_string = String(score) + "-" + String(COM_score);
  scrollText(score_string);
  matrix.fillScreen(0);
  delay(2000);
  matrix.show();
}

void scrollText(String text){
  int pass = 0;
  int x = matrix.width();
  for(int i=0;i<24;i++){
  matrix.fillScreen(0);
  matrix.setCursor(x,2);
  matrix.print(text);
  x -= 1;
  matrix.show();
  delay(150);
  }
}

void write_HS(){
  EEPROM.write(0x04,int(score));
}

int read_HS(){
  byte HS = EEPROM.read(0x04); //Read from address 4
  return HS;
}

Racquet Code

C/C++
#include <Wire.h>
#include <SPI.h>
#include <SparkFunLSM9DS1.h>

LSM9DS1 imu;

#define LSM9DS1_M  0x1E // Would be 0x1C if SDO_M is LOW
#define LSM9DS1_AG  0x6B // Would be 0x6A if SDO_AG is LOW

#define PRINT_SPEED 10 // 10 ms between checks
static unsigned long lastPrint = 0; // Keep track of print time

float accelx = 0;
float accely = 0;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
imu.settings.device.commInterface = IMU_MODE_I2C;
  imu.settings.device.mAddress = LSM9DS1_M;
  imu.settings.device.agAddress = LSM9DS1_AG;
  if (!imu.begin())
  {
   //failed
    while (1)
      ;
  }
}

void loop() {
   if ((lastPrint + PRINT_SPEED) < millis())
  {
  // put your main code here, to run repeatedly:
  if ( imu.accelAvailable() )
  {
    // To read from the accelerometer, first call the
    // readAccel() function. When it exits, it'll update the
    // ax, ay, and az variables with the most current data.
    imu.readAccel();
  }
  lastPrint = millis(); // Update lastPrint time
  }
  accelx = imu.calcAccel(imu.ax);
  accely = imu.calcAccel(imu.ay);

  if(accelx <= -1.5 || accelx >= 1.5){
    Serial.print(1);
    delay(600);
  }
  else if(accely <= -1.5 || accely >= 1.5){
    Serial.print(1);
    delay(600);
}
}

Python Code

Python
import serial
import time

matrix_port = "COM3"
raquet_port = "COM9"

matrix = serial.Serial(matrix_port, 9600)
racquet = serial.Serial(raquet_port,9600)
time.sleep(10)
while 1:
    data = racquet.read()
    print data
    if data == "1":
        print "hit"
        matrix.write("1")
        time.sleep(1)
    time.sleep(.05)

Credits

Arduino “having11” Guy

Arduino “having11” Guy

25 projects • 171 followers
I love creating cloud solutions that can interact with hardware along with using Arduino boards and Raspberry Pis to create new projects.
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