Nextion update through Arduino

hello everybody,

I am new on this forum but have already used a lot of helpful information from this forum.
Now I am working on updating my Nextion lcd through an Arduino Mega which I managed to do using the below code provided by Koepel (thanks, works great) from this thread:

while( true)
  {
    if( Serial.available())
      nexSerial.write( Serial.read());
    if( nexSerial.available())
      Serial.write( nexSerial.read());
  }

However this requires the Nextion editor. Does anybody know of a way to upload the Nextion TFT file with a loader such as XLoader through the Arduino USB to the Nextion?

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