OLED

Overview

The AlphaBot2 kit often comes with a 0.96-inch OLED display (usually 128x64 pixels) that connects via I2C (Inter-Integrated Circuit) communication. This small but sharp display is useful for showing real-time data, sensor readings, or debugging information without needing a serial monitor.

Key Feature

• Size
  • 0.96 inches (diagonal)
• Resolution
  • 128x64 pixels (monochrome or sometimes blue/yellow)
• Interface
  • I2C (uses SDA and SCL pins)
• Low Power Consumption
  • OLEDs only light up active pixels, saving energy.

Working

• Libraries
  • Wire.h: Enables I2C communication between Arduino and the OLED..
  • Adafruit_GFX: Provides basic graphics functions (text, shapes).
  • Adafruit_SSD1306: Driver for the OLED display.
  • Adafruit_SSD1306: Creates an object named display for controlling the OLED.
• begin(SSD1306_SWITCHCAPVCC, 0x3C)
  • Starts the OLED with internal voltage (address 0x3C for I2C).
• Buffer Management
  • clearDisplay() is called before new content to avoid Overlapping of text.
  • display() is required to push changes to the OLED.
• Text Positioning
  • setCursor(X, Y) sets the text origin (top-left is (0, 0)).
• I2C Address
  • 0x3C is the default I2C address for most OLEDs in AlphaBot2.