How to create a large String separated with line breaks

Projects Programming
6

1. From I2C Master, I executed the following codes:

void loop()
{
  Wire.beginTransmission(8);
  Wire.println();
  Wire.endTransmission();
  delay(1500);
}

2. At the I2C Slave side, I executed the following codes:

void loop()
{
  if (flag == true)
  {
    Serial.println(x1, HEX);
    flag = false;
  }
}

void receiveEvent(int howMany)
{
  x1 = Wire.read();
  flag = true;
}

3. The Slave's Serial Monitor Shows:

23:49:07.799 -> D