#include <U8g2lib.h>
#include <Servo.h>

// OLED using software I2C (change pins if needed)
U8G2_SSD1306_128X64_NONAME_F_SW_I2C u8g2(U8G2_R0, /* SCL=/ A5, / SDA=/ A4, / RESET=*/ U8X8_PIN_NONE);

#define JOY_X A0
#define JOY_Y A1
#define JOY_BTN 2
#define LED_PIN 13
#define SERVO_PIN 9

Servo myServo;

void setup() {
  pinMode(JOY_BTN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);
  myServo.attach(SERVO_PIN);

  u8g2.begin();
}

void loop() {
  int xVal = analogRead(JOY_X);
  int yVal = analogRead(JOY_Y);
  int btnState = digitalRead(JOY_BTN);

  int angle = map(xVal, 0, 1023, 0, 180);
  myServo.write(angle);

  if (yVal > 800) {
    digitalWrite(LED_PIN, HIGH);
  } else if (yVal < 200) {
    digitalWrite(LED_PIN, LOW);
  }

  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_6x10_tf);
  u8g2.setCursor(0, 10);
  u8g2.print("Angle: ");
  u8g2.print(angle);

  u8g2.setCursor(0, 25);
  u8g2.print("LED: ");
  u8g2.print((digitalRead(LED_PIN)) ? "ON" : "OFF");

  u8g2.setCursor(0, 40);
  u8g2.print("Button: ");
  u8g2.print((btnState == LOW) ? "Pressed" : "Released");

  u8g2.sendBuffer();

  delay(100);
}