A lightweight, feature-rich Arduino library for SSD1306 OLED displays that uses only the Wire library. Perfect for projects requiring minimal memory usage and no external dependencies.

• ✅ Wire Library Only - No heavy graphics libraries required
• ✅ Multiple Display Sizes - Supports 128x64 and 128x32 displays
• ✅ Configurable I2C Address - Works with 0x3C and 0x3D addresses
• ✅ Text Rendering - Built-in 5x7 font with position control
• ✅ Graphics Functions - Lines, rectangles, circles, pixels
• ✅ Image Support - Bitmap and XBM format images
• ✅ Memory Efficient - Optimized for Arduino Uno and similar boards
• ✅ Easy to Use - Simple, intuitive API

1. Open Arduino IDE
2. Navigate to Library Manager

   Tools → Manage Libraries... (or Ctrl+Shift+I)
   

3. Search for GeoLinker
   • Type "GeoLinker" in the search box
   • Install version 1.0.2
4. Include with #include <SimpleOLED.h>

1. Download the library files
2. Place in Arduino/libraries/SimpleOLED/
3. Restart Arduino IDE
4. Include with #include <SimpleOLED.h>

Add to your platformio.ini:

lib_deps = 
    SimpleOLED

#include <SimpleOLED.h>

SimpleOLED display;  // Default: 0x3C, 128x64

void setup() {
    display.begin();
    display.clear();
    display.println(0, 0, "Hello World!");
    display.display();
}

void loop() {
    // Your code here
}

• begin() - Initialize display
• display() - Update screen with buffer
• clear() - Clear display buffer
• setSize(width, height) - Set display dimensions
• setAddress(address) - Set I2C address

• print(text) / println(text) - Print at cursor
• print(x, y, text) / println(x, y, text) - Print at position
• setCursor(x, y) - Set text cursor position

• setPixel(x, y, color) - Set individual pixel
• drawLine(x0, y0, x1, y1) - Draw line
• drawRect(x, y, w, h) - Draw rectangle outline
• fillRect(x, y, w, h) - Draw filled rectangle
• drawCircle(x, y, radius) - Draw circle

• drawBitmap(x, y, bitmap, w, h) - Draw bitmap image
• drawXBM(x, y, xbm, w, h) - Draw XBM format image

display.clear();
display.println(0, 0, "Temperature:");
display.print(0, 16, "Value: ");
display.print(50, 16, 25.6, 1);
display.println(80, 16, " C");
display.display();

display.clear();
display.drawRect(10, 10, 50, 30, 1);
display.drawCircle(80, 25, 15, 1);
display.drawLine(0, 50, 127, 50, 1);
display.display();

// For 128x32 display
SimpleOLED display(0x3C, 128, 32);

// For different I2C address
SimpleOLED display(0x3D, 128, 64);

MIT License - Feel free to use in personal and commercial projects.

**Copyright (C) 2025 Jobit Joseph

Jobit Joseph

• v1.0.1 - Current release
• Bug Fix
• v1.0.0 - Initial release