#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

int angle = 0;

void setup() {
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
}

void loop() {
  display.clearDisplay();

  int centerX = 64;
  int centerY = 32;
  int radius = 28;

  // круг радара
  display.drawCircle(centerX, centerY, radius, WHITE);

  // линии внутри радара
  display.drawLine(centerX - radius, centerY, centerX + radius, centerY, WHITE);
  display.drawLine(centerX, centerY - radius, centerX, centerY + radius, WHITE);

  // луч радара
  float rad = angle * 3.14159 / 180;
  int x = centerX + cos(rad) * radius;
  int y = centerY + sin(rad) * radius;

  display.drawLine(centerX, centerY, x, y, WHITE);

  // точка "самолёта"
  display.fillCircle(90, 20, 2, WHITE);

  display.display();

  angle += 5;
  if (angle >= 360) angle = 0;

  delay(50);
}