Introduction

In this project, we are going to make a simple hand gesture control device using Arduino Leonardo and some IR sensors.

We can implement any controls of our PC or mobile phone by just the movement of our hands. What I here made is only just a scratch on the endless possibilities of gesture control. Soon we are going to make a fully functional game control أن شاء الله so be tuned.

Concept

We are using Arduino keyboard library to convert the inputs from IR obstacle sensor to keystrokes for controlling the car in NFS game,

• When the top right and top left sensors are trigged then it will simulate up arrow key.
• When the down right and down left sensors are trigged then it will simulate down arrow key.
• When the top right and down right sensors are trigged then it will simulate right arrow key.
• When the down left and top left sensors are trigged then it will simulate left arrow key.

Hardware Used

Components	Amazon.in	Amazon.com	Banggood	AliExpress	Utsource
Arduino Leonardo
IR obstacle sensor

Circuit description

Arrange the sensors on the 4 corners of the Leonardo board as shown in the figure in the video. Connect all the VCC of the IR sensor modules to the 3.3 v or 5v of the Leonardo and connect the ground of all the four sensors to the ground of the Arduino,

Output pin of IR sensor	Arduino Leonardo
Sensor 1	digital pin 11
Sensor 1	digital pin 9
Sensor 1	digital pin 12
Sensor 1	digital pin 10

Watch The Video – Playing NFS

Code

//gesture control
#include <Keyboard.h>
int up_right = 9;
int up_left = 11;
int down_right = 10;
int down_left = 12;

bool up_right_state;
bool down_right_state;
bool down_left_state;
bool up_left_state;
void setup()
{
  Keyboard.begin();
  Serial.begin(9600);
  pinMode(up_right, INPUT);
  pinMode(up_left, INPUT);
  pinMode(down_right, INPUT);
  pinMode(down_left, INPUT);


}

void loop()
{
  up_right_state = digitalRead(up_right);
  up_left_state = digitalRead(up_left);
  down_right_state = digitalRead(down_right);
  down_left_state = digitalRead(down_left);
  Serial.print(up_right_state);
  Serial.print(up_left_state);
  Serial.print(down_right_state);
  Serial.println(down_left_state);

  
  if (digitalRead(up_left) == 0 && digitalRead(up_right) == 0)
    while ((digitalRead(up_left) == 0 && digitalRead(up_right) == 0))
    {
      Serial.println("move up");
      Keyboard.press(KEY_UP_ARROW);
      delay(100);
      Keyboard.releaseAll();
      Keyboard.end();
    }
  
  if (digitalRead(down_left) == 0 && digitalRead(down_right) == 0 )
    while ((digitalRead(down_left) == 0 && digitalRead(down_right) == 0 ) )

    {
      Serial.println("move down");
      Keyboard.press(KEY_DOWN_ARROW);
      delay(100);
      Keyboard.releaseAll();
      Keyboard.end();
    }

  if (digitalRead(down_left) == 0 && digitalRead(up_left) == 0 )
    while (digitalRead(down_left) == 0 && digitalRead(up_left) == 0 )

    {
      Serial.println("move left");
      Keyboard.press(KEY_LEFT_ARROW);
      delay(100);
      Keyboard.releaseAll();
      Keyboard.end();
    }

  if (digitalRead(up_right) == 0 && digitalRead(down_right) == 0)
    while (digitalRead(up_right) == 0 && digitalRead(down_right) == 0)

    {
      Serial.println("move right");
      Keyboard.press(KEY_RIGHT_ARROW);
      delay(100);
      Keyboard.releaseAll();
      Keyboard.end();
    }


  if (digitalRead(up_right) == 0 && digitalRead(down_right) == 1 && digitalRead(down_left) == 1 && digitalRead(up_left) == 1)
    while (digitalRead(up_right) == 0 && digitalRead(down_right) == 1 && digitalRead(down_left) == 1 && digitalRead(up_left) == 1)

    {
      Serial.println("move right up corner");
      Keyboard.press(KEY_RIGHT_ARROW);
      Keyboard.press(KEY_UP_ARROW);
      delay(100);
      Keyboard.releaseAll();
      Keyboard.end();
    }

  if (digitalRead(up_left) == 0 && digitalRead(down_right) == 1 && digitalRead(up_right) == 1 && digitalRead(down_left) == 1)
    while (digitalRead(up_left) == 0  && digitalRead(down_right) == 1 && digitalRead(up_right) == 1 && digitalRead(down_left) == 1)

    {
      Serial.println("move left up corner");
      Keyboard.press(KEY_LEFT_ARROW);
      Keyboard.press(KEY_UP_ARROW);
      delay(100);
      Keyboard.releaseAll();
      Keyboard.end();
    }

  if (digitalRead(down_left) == 0 && digitalRead(up_right) == 1 && digitalRead(up_left) == 1 && digitalRead(down_right) == 1 )
    while (digitalRead(down_left) == 0 && digitalRead(up_right) == 1 && digitalRead(up_left) == 1 && digitalRead(down_right) == 1 )

    {
      Serial.println("move left down corner");
      Keyboard.press(KEY_LEFT_ARROW);
      Keyboard.press(KEY_DOWN_ARROW);
      delay(100);
      Keyboard.releaseAll();
      Keyboard.end();
    }

  if (digitalRead(down_right) == 0 && digitalRead(up_right) == 1 && digitalRead(up_left) == 1 && digitalRead(down_left) == 1)
    while (digitalRead(down_right) == 0 && digitalRead(up_right) == 1 && digitalRead(up_left) == 1 && digitalRead(down_left) == 1)

    {
      Serial.println("move right down corner");
      Keyboard.press(KEY_RIGHT_ARROW);
      Keyboard.press(KEY_DOWN_ARROW);
      delay(100);
      Keyboard.releaseAll();
      Keyboard.end();
    }



}

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