//SSD1306 OLED DISPLAY
//LIBRARY FUNCTION USED :1)Adafruit SSD1306   2)Adafruit GFX Library

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

// OLED display width and height
#define SCREEN_WIDTH 128 //Display Width And Height Is Fixed
#define SCREEN_HEIGHT 64

// Create display object (I2C address 0x3C is common)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  // Initialize serial and OLED
  Serial.begin(9600);//freq baud rate
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Check your OLED I2C address
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Infinite loop on error
  }

  delay(2000); // Wait for display

  // Clear the display
  display.clearDisplay();

  // Set text size and color
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("HELLO !!!");
  display.display();

  delay(2000);

  // Display a new message
  display.clearDisplay();
  display.setTextSize(1);
  display.setCursor(0, 0);
  display.println("Welcome To OLED");
  display.println("Arduino UNO");
  display.display();
}
void loop() {
  // put your main code here, to run repeatedly:

}
// OLED DISPLAY PIN CONFIGURATION
//GND - GROUND PIN (ANY)
//VCC PIN - ONLY 3.3V [FIXED]
//SDA - IN A4 PIN [FIXED] (SERIAL DATA LINE)
//SCL - IN A5 PIN [FIXED] (SERIAL CLOCK LINE)