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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define TRIGGER_PIN 2
#define ECHO_PIN 3
#define SERVO_PIN 5

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

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.display();
  display.clearDisplay();
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  servo.attach(SERVO_PIN);
}

void loop() {
  // put your main code here, to run repeatedly:
  display.clearDisplay();
  long duration, distance;
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  duration = pulseIn(ECHO_PIN, HIGH);
  distance = (duration * 0.0343) / 2;
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.print("MASOFA: ");
  display.setCursor(15,20);
  display.setTextSize(3);
  display.print(distance);
  display.println(" sm");
  int servoPos = map(distance, 0, 400, 0, 180);
  servo.write(servoPos);
  display.display();
  delay(500);
}