ESP32 with a 0.96-inch OLED display:

Hardware Setup:

1. Gather the necessary components:
   • ESP32 development board
   • 0.96-inch OLED display module
   • Jumper wires
   • Breadboard (optional)
   • Power supply (3.3V or 5V)
2. Connect the OLED display to the ESP32:
   • Connect the VCC pin of the OLED display to the 3.3V or 5V output of the ESP32.
   • Connect the GND pin of the OLED display to the ground pin of the ESP32.
   • Connect the SCL pin of the OLED display to the SCL pin of the ESP32.
   • Connect the SDA pin of the OLED display to the SDA pin of the ESP32.

Software Setup:

1. Install the Arduino IDE: Download and install the Arduino IDE from https://support.arduino.cc/hc/en-us/articles/360019833020-Download-and-install-Arduino-IDE.  
2. Install the ESP32 board support package: Open the Arduino IDE, go to File > Preferences, and add the following URL to the Additional Boards Manager URLs field: https://dl.espressif.com/package/esp32/index.json. Then, go to Tools > Board > Boards Manager and install the “ESP32” board.  
3. Install the Adafruit SSD1306 library: Search for “Adafruit SSD1306” in the Library Manager and install it.

Code:

C++

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

#define SCREEN_WIDTH 128 // OLED display width
#define SCREEN_HEIGHT 64 // OLED display height   

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire);   

void setup() {
  Wire.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // Address may vary
  display.clearDisplay();
  display.display();
}

void loop() {
  display.clearDisplay();

  // Draw text
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 0);
  display.println("Hello, world!");

  // Draw a rectangle
  display.drawRect(10, 10, 100, 30, WHITE);

  // Display the image
  display.display();

  delay(2000);
}

Explanation:

• The code includes the necessary libraries for I2C communication, graphics, and the OLED display.
• The SCREEN_WIDTH and SCREEN_HEIGHT constants define the dimensions of the OLED display.
• In the setup() function, I2C is initialized, the OLED display is initialized, and the display is cleared.
• In the loop() function, the display is cleared, text is drawn, a rectangle is drawn, and the image is displayed.

Uploading the Code:

1. Connect the ESP32 to your computer.
2. Select the correct board and port in the Arduino IDE.
3. Compile and upload the code to the ESP32.

Testing:

1. Observe the OLED display to see the text and rectangle being drawn.

Additional Notes:

• You can customize the code to display different text, shapes, images, or animations on the OLED display.
• The OLED display’s address might vary depending on the specific model. You might need to adjust the address in the display.begin() function.
• Consider using a library or framework like ThingSpeak or Blynk to control the OLED display remotely.

By following these steps, you can effectively use an ESP32 to display information on a 0.96-inch OLED display.