Revise paste OLED Hello rev_01

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- Project: OLED Hello
	- Source Code NOT compiled for: ESP32 DevKit V1
	- Source Code created on: 2024-10-19 21:02:45

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* just check that the display works in a espduino 32 */
	/* hw 707 (almost the same that d1 r32) whit a simple */
	/* code. */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <Adafruit_SSD1306.h>    // https://github.com/stblassitude/Adafruit_SSD1306_Wemos_OLED.git
#include <U8g2_for_Adafruit_GFX.h> // https://github.com/olikraus/U8g2_for_Adafruit_GFX

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF I2C PINS *****/
const uint8_t SSD1306_I2C_PIN_SDA = 21; // SDA pin
const uint8_t SSD1306_I2C_PIN_SCL = 22; // SCL pin
const uint8_t SSD1306_I2C_SLAVE_ADDRESS = 60; // I2C address

/****** DEFINITION OF LIBRARIES CLASS INSTANCES *****/
Adafruit_SSD1306 display(SSD1306_I2C_SLAVE_ADDRESS); // Initialize the display object
U8G2_FOR_ADAFRUIT_GFX u8g2_for_adafruit_gfx; // Initialize U8g2 for Adafruit GFX

void setup(void)
{
    // Initialize the display
    display.begin(SSD1306_SWITCHCAPVCC, SSD1306_I2C_SLAVE_ADDRESS); // Start the display
    display.clearDisplay(); // Clear the display buffer

// Connect U8g2 procedures to Adafruit GFX
    u8g2_for_adafruit_gfx.begin(display); // Initialize U8g2 with the display object
    
    // Example to set font and display text
    u8g2_for_adafruit_gfx.setFontMode(1); // Use U8g2 transparent mode
    u8g2_for_adafruit_gfx.setFontDirection(0); // Left to right
    u8g2_for_adafruit_gfx.setForegroundColor(WHITE); // Set text color to white
    u8g2_for_adafruit_gfx.setFont(u8g2_font_helvR14_tf); // Select a font
    u8g2_for_adafruit_gfx.setCursor(0, 20); // Set cursor position
    u8g2_for_adafruit_gfx.print(F("Hello World")); // Print text
    display.display(); // Make everything visible
    delay(2000); // Delay for 2 seconds
}

void loop(void)
{
    // Main code to run repeatedly
    display.clearDisplay(); // Clear the display buffer
    u8g2_for_adafruit_gfx.setCursor(0, 20); // Set cursor position
    u8g2_for_adafruit_gfx.print(F("Hello World")); // Print text
    display.display(); // Make everything visible
    delay(2000); // Delay for 2 seconds
}