1.3-Inch OLED Display with EC11 Rotary Encoder Module 128x64 I2C White

Specifications:

• Screen Size: 1.3 Inch Diagonal
  
• Resolution: 128 x 64 Pixels
  
• Display Technology: OLED (Self-Emitting, No backlight needed)
  
• Driver IC: SH1106 (Compatible with SSD1306 libraries)
  
• Interface: I2C (Default Address: 0x3C or 0x3D)
  
• Encoer Typed: EC11 with integrated Push-Button
  
• Operating Voltage: 3.3V to 5V DC
  
• Communication: 4-Pin I2C (VCC, GND, SCL, SDA) + Encoder Pins (A, B, Key)

Applications:

• Smart Home Controllers: Adjust temperature or dim lights using the rotary dial.
  
• Synthesizers & Audio Gear: Perfect for selecting waveforms or adjusting volume with visual feedback.
  
• Lab Power Supplies: Use the encoder for precise voltage setting and the OLED for real-time monitoring.
  
• CNC/3D Printer Interfaces: A compact "Jog" controller for manual axis movement.

Buying Guide
Tutorials

Project Evolution

• Past Projects (Prerequisites): If you have mastered basic 16x2 LCDs and simple push-buttons, you know how limited they feel for complex menus.
  
• Feature Upgrade: This module upgrades your project from "basic hobbyist" to "professional interface." It unlocks hierarchical menu navigation, real-time graphing, and high-resolution status icons.
  
• Effort Level: Intermediate. While the hardware is simplified, coding a rotary menu requires a bit of logic (don't worry, we provide the library links!).

Virtual Technician & Wiring

        ⚠️ Safety Warning: Ensure your microcontroller logic level matches your power input. This module is Probots Logic-Safe™ for both 3.3V (ESP32) and 5V (Arduino Uno) systems.

Pin Mapping:

• VCC: 3.3V - 5V
  
• GND: Ground
  
• SCL/SDA: I2C Clock and Data
  
• ENCA / ENCB: Encoder Output (Requires Pull-ups)
  
• SW: Encoder Push Button (Active Low)

Package Including: 1 X 1.3-Inch OLED Display with EC11 Rotary Encoder Module 128x64 I2C White

Frequently Asked Questions (FAQ)

1. Does this use the SSD1306 or SH1106 driver?
   It typically uses the SH1106, though many SSD1306 libraries work by simply changing the constructor.
   
2. Can I use this with an ESP32 at 3.3V?
   Yes, it is fully compatible with 3.3V logic.
   
3. Is the encoder knob included?
   This module includes the encoder soldered to the board; knobs are usually sold separately.
   
4. What is the I2C address?
   The default is 0x3C.
   
5. Does the OLED require a separate power supply?
   No, it runs off the same VCC as the logic pins.
   
6. Can I display graphics and bitmaps?
   Yes, the 128x64 resolution supports custom bitmaps.
   
7. Is the display color white or blue?
   This specific model is high-contrast White.
   
8. How many pulses per rotation does the encoder have?
   It is a standard 20-pulse/20-detent EC11 encoder.
   
9. Do I need external pull-up resistors for I2C?
   Most units have onboard 4.7k resistors, but check your specific MCU requirements.
   
10. Can I change the I2C address?
    Yes, there is usually a solder jumper on the back to switch between 0x3C and 0x3D.
    
11. What library is best for Arduino?
    We highly recommend the U8g2 library for flexibility.
    
12. Does it support SPI?
    No, this specific integrated module is I2C only for pin efficiency.
    
13. Is the push button on the encoder separate?
    Yes, it has a dedicated 'SW' pin.
    
14. Can I use this for a 3D printer menu?
    Yes, it's a popular choice for custom Marlin or Klipper interfaces.
    
15. Is it sunlight readable?
    Being an OLED, it has great contrast, but direct sunlight may still wash it out compared to e-Ink.
    
16. What is the refresh rate?
    Over I2C at 400kHz, you can achieve roughly 20-30 FPS depending on the library.
    
17. How do I debounce the encoder?
    You can use a library like Encoder.h or add 100nF capacitors.
    
18. What is the current consumption?
    Typically less than 20mA when the screen is mostly full.
    
19. Can I turn off the screen to save power?
    Yes, the driver supports a "Display Off" command via software.
    
20. Is the header pre-soldered?
    Yes, most batches come with pre-soldered headers for breadboard use.