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OLED Display (Graphics & Fonts) | NexaLearn IoT Lab | NexaLearn

Displays30 دقيقة

OLED Display (Graphics & Fonts)

Draw circles, lines, and tiny icons.

Lesson Content

OLED screens don't need a backlight (each pixel lights itself), giving true black and saving power. The most common is 0.96-inch operating via I2C. We use the Adafruit_SSD1306 library to draw pixel by pixel, allowing graphics and text at various sizes unlike the limited character-based LCD.

Components Needed

Arduino UnoOLED Display 0.96 I2C

Wiring Notes

Like the LCD: VCC to 5V or 3.3V. SDA to A4 and SCL to A5.

Code Example

#include <Adafruit_SSD1306.h>
Adafruit_SSD1306 display(128, 64, &Wire, -1);

void setup() {
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(10, 20);
  display.println("IoT Lab");
  display.display(); // هذا السطر ضروري لإظهار التعديلات
}
void loop() {}

Common Mistakes

Forgetting the display.display() command at the end of your code, leaving the screen black even though the code and wiring are correct.

Next Lesson

Introduction to Industrial Sensors & Reliability