Arduino Beginner Experiments: Arduino and Joystick Module part 2

HELLO THERE!!!

    How are you guys? I hope everyone is fine and in a good mood always. So, I decided to continue my post last week by implementing the Joystick module as a mouse. In this experiment, the joystick will control the mouse movement and left button click.


HARDWARE:
1.Arduino Leonardo

2.Joystick Module

SOFTWARE:

1.Arduino IDE

CIRCUIT ASSEMBLY

 The assembly of the circuit is similar with what we did last week:

Joystick Module --------------->Arduino

GND                                            GND

5V                                                  5V

VRx                                              (any analog pin)

VRy                                              (any analog pin)

SW                                                (any digital pin)

The schematic of the circuit

  CODING THE ARDUINO 
  The code below is taken from the Arduino website. I also added a piece of code which enables the function of the button. The button sometimes take more than a few seconds to function though.   

#include<Mouse.h>

const int xAxis = A1;         //analog sensor for X axis  
const int yAxis = A2;         // analog sensor for Y axis

int range = 12;               // output range of X or Y movement
int responseDelay = 2;       // response delay of the mouse, in ms
int threshold = range/4;      // resting threshold
int center = range/2;         // resting position value
int minima[] = { 
  1023, 1023};                // actual analogRead minima for {x, y}
int maxima[] = {
  0,0};                       // actual analogRead maxima for {x, y}
int axis[] = {
  xAxis, yAxis};              // pin numbers for {x, y}
int mouseReading[2];          // final mouse readings for {x, y}


void setup() {
  pinMode(digitalRead(2), INPUT); //initialize button as input
 Mouse.begin();


}

void loop() {

// read and scale the two axes:
  int xReading = readAxis(0);
  int yReading = readAxis(1);

if(digitalRead(2) == HIGH){ //if button gives high value,enable click
    Mouse.click();
  } 
// move the mouse:
    Mouse.move(xReading, yReading, 0);
    delay(responseDelay);
    
}

/*
  reads an axis (0 or 1 for x or y) and scales the 
  analog input range to a range from 0 to <range>
*/

int readAxis(int axisNumber) {
  int distance = 0;    // distance from center of the output range

  // read the analog input:
  int reading = analogRead(axis[axisNumber]);

// of the current reading exceeds the max or min for this axis,
// reset the max or min:
  if (reading < minima[axisNumber]) {
    minima[axisNumber] = reading;
  }
  if (reading > maxima[axisNumber]) {
    maxima[axisNumber] = reading;
  }

  // map the reading from the analog input range to the output range:
  reading = map(reading, minima[axisNumber], maxima[axisNumber], 0, range);

 // if the output reading is outside from the
 // rest position threshold,  use it:
  if (abs(reading - center) > threshold) {
    distance = (reading - center);
  } 

  // the Y axis needs to be inverted in order to 
  // map the movemment correctly:
  if (axisNumber == 1) {
    distance = -distance;
  }

  // return the distance for this axis:
  return distance;
}    
      Upload the code to Arduino and play with the joystick!! Move the joystick module around and see your mouse move correspondingly. Click down and see the mouse performs a left click (might take some delays). Well, that's all from me, guys. I hope to see you guys next week. Till then, HAPPY TINKERING