Have a look at the web page for the display:
https://www.itead.cc/nextion-nx3224t024.html
It's not a normal LCD, you need preload all the graphics into the SD card. It's a "smart" display needed very little in the way of computing power of the hardware driving it.
B
Posts made by Brent Bolen
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RE: Nextion NX3224T024 - Generic 2.4'' TFT Intelligent LCD Touch Display