OLED Messaging rev_05

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    - Project: OLED Messaging
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2024-08-25 15:27:39

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Display "Hello, World!" on the SSD1306 OLED using */
    /* I2C communication with SDA on pin D21 and SCL on */
    /* pin D22, ensuring proper initialization of the */
    /* Adafruit SSD1306 library. */
/****** END SYSTEM REQUIREMENTS *****/


/********* User code review feedback **********
#### Feedback 1 ####
- print on serial that esp32 is alive on loop function
#### Feedback 2 ####
- change address from 0x3C to 0x78
********* User code review feedback **********/

/****** 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 display_SSD1306OledDisplay_I2C_PIN_SDA_D21 = 21; // SDA pin
const uint8_t display_SSD1306OledDisplay_I2C_PIN_SCL_D22 = 22; // SCL pin
const uint8_t display_SSD1306OledDisplay_I2C_SLAVE_ADDRESS = 0x78; // Updated I2C address to 0x78

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Create an instance of the display object
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64  // OLED display height, in pixels
#define OLED_RESET    -1  // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); // Initialize display with I2C

// Create an instance for U8g2 using the Adafruit display
U8G2_FOR_ADAFRUIT_GFX u8g2_for_adafruit_gfx; // Create an instance for U8g2

void setup(void)
{
    // Initialize serial communication for debugging
    Serial.begin(9600);

    // Initialize the display with updated I2C address
    display.begin(SSD1306_SWITCHCAPVCC, display_SSD1306OledDisplay_I2C_SLAVE_ADDRESS);
    display.clearDisplay(); // Clear the display buffer

    // Connect u8g2 procedures to Adafruit GFX
    u8g2_for_adafruit_gfx.begin(display);

    // Set up the display
    display.setTextSize(1); // Set text size
    display.setTextColor(SSD1306_WHITE); // Set text color
    display.setCursor(0, 0); // Set cursor position
    display.println(F("Hello, World!")); // Print message
    display.display(); // Refresh the display
    delay(2000); // Delay for 2 seconds
}

void loop(void)
{
    // Main code to run repeatedly
    display.clearDisplay(); // Clear the display buffer
    display.setCursor(0, 0); // Set cursor position
    display.println(F("ESP32 with OLED")); // Print message
    display.display(); // Refresh the display
    delay(2000); // Delay for 2 seconds

    // Print to serial to indicate ESP32 is alive
    Serial.println("ESP32 is alive!"); // Print message to serial monitor
}

/* END CODE */