Programming via SD card
Press the ‘Compile’ button
Select File > Open Build Folder
Copy the .tft file created onto a microSD card (FAT32 formatted).
Insert the microSD card into the Nextion display and power it. You will see a message confirming the code is being uploaded.
Once complete the display will display a message instrucing you to remove power and remove the microSD card.
When you power it up again the new version of your interface will be there.