ESP-12 (ESP8266) with OLED Display (SSD1306) - Arduino Code

This guide provides an Arduino sketch to interface an ESP-12 (ESP8266) with a 0.96" SSD1306 OLED display using the Adafruit SSD1306 library. The code initializes the OLED screen, displays text, and draws simple graphics.

** Hardware Requirements **

• ESP-12 (ESP8266) Module
• 0.96" OLED Display (SSD1306, I2C)
• Jumper Wires
• 3.3V Power Source (ESP-12 operates at 3.3V)

** Wiring Diagram (ESP-12 to OLED - I2C Mode)**

** Install Required Libraries **

Before uploading the code, install the following libraries in the Arduino IDE:

1. Adafruit GFX
2. Adafruit SSD1306
3. Wire (Pre-installed in Arduino IDE) To install:

• Go to Sketch → Include Library → Manage Libraries
• Search and install Adafruit GFX & Adafruit SSD1306

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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

 
void setup() {
  Serial.begin(115200);
  

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C, false, false)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  delay(2000); // Pause for 2 seconds
 
  // Clear the buffer.
  display.clearDisplay();
  
  display.setTextSize(1);             
  display.setTextColor(SSD1306_WHITE);       
  display.setCursor(0,0);            
  display.println("ESP12 SSD1306 OLED");
  display.setTextSize(2);
  display.setCursor(0,24);
  display.println("EltroNerd");
  display.setTextSize(1);
  display.setCursor(0,44);
  display.println("[email protected]");
  display.display();
}
 
void loop() {
  display.clearDisplay();

    // Display Title
    display.setCursor(10, 10);
    display.setTextSize(2);
    display.print("ESP-12 OLED");

    // Draw a Rectangle
    display.drawRect(20, 30, 80, 20, WHITE);

    // Draw a Circle
    display.fillCircle(64, 50, 5, WHITE);

    display.display();
    delay(1000);
}