// ##############################################################
//                     Joystick Interface                       #
// ##############################################################
// 
//  Joystick (KY-023) interface with Arduino Uno (Hardware & Simulation)
// 
//  Check out the link for Code explanation and Hardware details
//  Link: 
//   http://tech.arunkumarn.in/blogs/arduino-uno/ky-023-joystick-%2B-arduino-uno-wiring-code-%26-calibration-for-beginners/

// Pin Definitions
const int PIN_X = A0;        // X-axis analog input
const int PIN_Y = A1;        // Y-axis analog input
const int PIN_BTN = 2;       // Button digital input

// Calibration values (adjust for your module)
const int CENTER_THRESHOLD = 20;  // Deadzone around center
const int MIN_VAL = 0;
const int MAX_VAL = 1023;
const int CENTER_VAL = 512;

void setup() {
  // Initialize Serial communication
  Serial.begin(9600);
  while (!Serial); // Wait for Serial Monitor

  // Configure button pin with internal pull-up
  pinMode(PIN_BTN, INPUT_PULLUP);

  Serial.println("🎮 Joystick Initialized");
  Serial.println("X\tY\tButton");
  Serial.println("--------------------");
}

void loop() {
  // Read analog values (0-1023)
  int xValue = analogRead(PIN_X);
  int yValue = analogRead(PIN_Y);

  // Read button state (LOW = pressed)
  bool buttonPressed = (digitalRead(PIN_BTN) == LOW);

  // Optional: Apply deadzone filtering for center position
  if (abs(xValue - CENTER_VAL) < CENTER_THRESHOLD) xValue = CENTER_VAL;
  if (abs(yValue - CENTER_VAL) < CENTER_THRESHOLD) yValue = CENTER_VAL;

  // Output to Serial Monitor
  Serial.print(xValue);
  Serial.print("\t");
  Serial.print(yValue);
  Serial.print("\t");
  Serial.println(buttonPressed ? "PRESSED" : "RELEASED");

  // Small delay for stable readings
  delay(100);
}