#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128 
#define SCREEN_HEIGHT 64 
#define OLED_RESET     4 
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() 
{

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.display();
  delay(1000);
  display.clearDisplay();

}

void loop() 
{

  //text
  display.clearDisplay();                 
  display.setTextSize(1,2);               
  display.setTextColor(SSD1306_WHITE);    
  display.setCursor(0,0);                 
  display.println(F("Hello OLED"));
  display.display();               
  delay(2000);
  
}