// Display the ASCII Symbol

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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

#define OLED_RESET -1
#define SCREEN_ADRESS 0x3C
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup(){
  Serial.begin(115200);
  // Initialize OLED Object
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADRESS)){
    Serial.println(F("SSD1306 allocation failed"));
    for(;;)
    {

    }
  }
  display.clearDisplay();
}

void loop(){
  // display Text
  int letterWidth = 6;    // Width of letter "A"
  int centerX = (SCREEN_WIDTH - letterWidth) / 2;
  display.clearDisplay();
  display.setCursor(centerX, 24);
  display.setTextSize(3);
  display.setTextColor(WHITE);
  display.write(65);
  display.display();
  delay(4000);
  display.clearDisplay();

  display.setCursor(centerX, 24);
  display.setTextSize(3);
  display.setTextColor(WHITE);
  display.write(3);
  display.display();
  delay(4000);
  display.clearDisplay();
}