#define LED_PIN 10

void setup() {
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(9600);
  while (!Serial) {
    ;
  }
  Serial.println("LiFi Transmitter Ready");
}

void loop() {
  sendText("Hello World");
  delay(1000);
}

void sendText(const char* text) {
  Serial.print("Transmitting text: ");
  Serial.println(text);
  
  for (int i = 0; text[i] != '\0'; i++) {
    char c = text[i];
    Serial.print("Transmitting character '");
    Serial.print(c);
    Serial.println("'");
    
    sendCharacter(c);
    delay(500); // Adjust delay based on transmission speed
  }
}

void sendCharacter(char c) {
  for (int i = 0; i < 8; i++) {
    digitalWrite(LED_PIN, c & (1 << i));
    delayMicroseconds(100); // Adjust delay based on transmission speed
  }
}