This script implements a flight controller joystick for my X-Flight simulator. Works with an Arduino Micro or A-Star 32U4 Mini

flight_controller.ino

// Requires Arduino Joystick Library https://github.com/MHeironimus/ArduinoJoystickLibrary
#include <Joystick.h>

const int8_t sw_1 = 18;
const int8_t sw_2 = 4;
const int8_t sw_3 = 6;

//Joystick_ Joystick;
Joystick_ Joystick(JOYSTICK_DEFAULT_REPORT_ID,
                   JOYSTICK_TYPE_JOYSTICK, 4, 0,
                   true, true, false, false, false, false,
                   true, true, true, false, true);

int pot0;
int pot1;
int pot2;
int pot3;
int pot4;
int pot5;

int currentSwState1;
int lastSwState1;
int currentSwState2;
int lastSwState2;
int currentSwState3;
int lastSwState3;

// roll pot0 A5 653 303
// pitch pot1 a4 0 915
// throttle pot2 a3 465 158
// mix pot3 a2 457 156
// flap pot4 a1 455 156
// rudder a8 374 960

void setup() {
  Serial.begin(9600);
  pinMode(sw_1, INPUT_PULLUP);
  pinMode(sw_2, INPUT_PULLUP);
  pinMode(sw_3, INPUT_PULLUP);

  // Initialize Joystick Library
  Joystick.begin();
  Joystick.setXAxisRange(653, 303);
  Joystick.setYAxisRange(0, 915);
  Joystick.setThrottleRange(465, 158);
  Joystick.setAcceleratorRange(457, 156);
  Joystick.setRudderRange(374, 960);
  Joystick.setSteeringRange(455, 156);

}

void loop() {

  // Read Joystick
  pot0 = analogRead(A5);
  pot1 = analogRead(A4);
  pot2 = analogRead(A3);
  pot3 = analogRead(A2);
  pot4 = analogRead(A1);
  pot5 = analogRead(A8);

  Serial.print(pot0);
  Serial.print("   ");
  Serial.print(pot1);
  Serial.print("   ");
  Serial.print(pot2);
  Serial.print("   ");
  Serial.print(pot3);
  Serial.print("   ");
  Serial.print(pot4);
  Serial.print("   ");
  Serial.print(pot5);

  int currentSwState1 = !digitalRead(sw_1); // Button 1
  if (currentSwState1 != lastSwState1)
  {
    Joystick.setButton(1, currentSwState1);
    lastSwState1 = currentSwState1;
  }
  Serial.print("   ");
  Serial.print(lastSwState1);

  int currentSwState2 = !digitalRead(sw_2); // Button 2
  if (currentSwState2 != lastSwState2)
  {
    Joystick.setButton(2, currentSwState2);
    lastSwState2 = currentSwState2;
  }
  Serial.print("   ");
  Serial.print(lastSwState2);

  int currentSwState3 = !digitalRead(sw_3); // Button 3
  if (currentSwState3 != lastSwState3)
  {
    Joystick.setButton(3, currentSwState3);
    lastSwState3 = currentSwState3;
  }
  Serial.print("   ");
  Serial.println(lastSwState3);

  // Output Controls
  Joystick.setXAxis(pot0);
  Joystick.setYAxis(pot1);
  Joystick.setThrottle(pot2);
  Joystick.setAccelerator(pot3);
  Joystick.setSteering(pot4);
  Joystick.setRudder(pot5);
  Joystick.sendState();

}