#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Fonts/FreeMono9pt7b.h>

#define POTENTIOMETER_IN A0
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

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

int i, wave = 0;

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

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("SSD1306 allocation failed");
    for (;;);
  }
  delay(2000);

  display.setFont(&FreeMono9pt7b);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 20);
  display.println("Shved\nAndrii\nIO-23");
  display.display();
  delay(3000);
}

void loop() {
  display.clearDisplay();

  for (i = 0; i < SCREEN_WIDTH; ++i) {
    wave = analogRead(POTENTIOMETER_IN);
    wave = map(wave, 0, 1023, SCREEN_HEIGHT - 1, 0);
    wave = constrain(wave, 0, SCREEN_HEIGHT);

    display.drawPixel(i, wave, WHITE);
    display.display();
  }
}