v1 Arduino Controller for Unreal Engine 5 - version 1

arduino_controller.ino

// Version One (single 3-axis joystick and 2 LEDs + simple communication protocol)
// See the how-to: https://medium.com/@angelicgarbage/build-an-arduino-controller-for-your-unreal-5-game-v1-a9a081fe3990
// Save this file as controller.ino


#define greenLed 4
#define redLed 5

// Joystick Pins
int xPin = A0;
int yPin = A1;
int zButton = 2;

// Joystick Values
int xVal;
int yVal;
int buttonState;

void setup()
{
    Serial.begin(115200);

    pinMode(greenLed, OUTPUT);
    pinMode(redLed, OUTPUT);

    // Set pinmodes for Joystick
    pinMode(xPin, INPUT);
    pinMode(yPin, INPUT);
    pinMode(zButton, INPUT_PULLUP);

    // Establish contact with Unreal before transmitting data.
    establishContact();
}

void loop()
{
    // LED is green for transmitting
    digitalWrite(greenLed, HIGH);
    digitalWrite(redLed, LOW);

    // Read Joystick values
    xVal = map(analogRead(xPin), 0, 1025, 0, 100);
    yVal = map(analogRead(yPin), 0, 1025, 0, 100);
    buttonState = digitalRead(zButton);
    
    // Output Joystick X, Y, and Z

    Serial.print("D");
    Serial.println(xVal);

    Serial.print("E");
    Serial.println(yVal);
 
    Serial.print("F");
    Serial.println(buttonState);

    Serial.print("C");
    Serial.println(1);

    // Wait to full timeStep period
    delay(100);
}

// Establish contact with unreal before transmitting data
void establishContact() {
  while (Serial.available() <= 0) {
    Serial.print('A');
    digitalWrite(greenLed, LOW);
    digitalWrite(redLed, HIGH);
    delay(300);
  }
}