Virtual IoT Lab DEI

Instructions

Objective:

Learn how to interface and display animated text on an OLED display using Arduino with Adafruit SSD1306 library.

Steps to Perform:

Click "Start Simulation" to power up the Arduino circuit
The OLED display will initialize and clear the screen
Text messages will appear word-by-word with animation effects
First message: "Welcome to IOT Virtual Lab" displays across 2 lines
Second message: "This is a sample program of OLED Display" shows across 3 lines
The animation sequence loops continuously

Key Concepts:

OLED Display: 128x64 pixel organic LED display with SSD1306 controller
Adafruit Libraries: Uses Adafruit_GFX and Adafruit_SSD1306 for display control
I2C Communication: Display communicates via I2C protocol (address 0x3D)
Text Animation: Custom function displays text word-by-word with delays
Display Functions: clearDisplay(), setTextSize(), setCursor(), print()
Screen Resolution: 128 columns × 64 rows for graphics and text

Arduino Code - main.ino

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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET     4
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// Function to display full line word-by-word with animation
void animateLine(String line, int x, int y, int wordDelay) {
  display.setCursor(x, y);
  String word = "";
  for (int i = 0; i < line.length(); i++) {
    char c = line.charAt(i);
    if (c == ' ' || i == line.length() - 1) {
      if (i == line.length() - 1) word += c;  // Include last character
      display.print(word + " ");
      display.display();
      delay(wordDelay);
      word = "";
    } else {
      word += c;
    }
  }
}

void setup() {
  Serial.begin(9600);

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3D)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }

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

void loop() {
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);

  // First message: split into 2 lines manually
  animateLine("Welcome to IOT", 0, 10, 400);
  animateLine("Virtual Lab", 0, 20, 400);
  delay(1000);  // pause between messages

  display.clearDisplay();

  // Second message: also split to fit OLED screen
  animateLine("This is a sample", 0, 10, 300);
  animateLine("program of OLED", 0, 20, 300);
  animateLine("Display", 0, 30, 300);
  delay(1500);  // pause before repeating
}

            
          