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Nextion 2.4", 2.8", 3.2", 4.3" Firmwares

Firmwares for Nextion 2.4", 2.8", 3.2", 4.3" displays to use with MK4duo (3D Printer Arduino firmware).

Video demo: youtu.be/Kq1StPYwWfQ.

If 3D GFX Preview is not working

Change these lines in /src/lcd/nextion/Nextion_lcd.cpp:

if (strstr(buffer, "4827")) { // Model 4.3" Normal or Enhanced
        SERIAL_MSG(" 4.3");
        #if ENABLED(NEXTION_GFX)
          gfx.set_position(1, 24, 250, 155);
        #endif
}
else if (strstr(buffer, "8048")) { // Model 7" Normal or Enhanced
        SERIAL_MSG(" 7");
        #if ENABLED(NEXTION_GFX)
          gfx.set_position(274, 213, 250, 155);
        #endif
}

to:

if (strstr(buffer, "3224")) { // Model 2.4" or 2.8" Normal or Enhanced
	SERIAL_MSG(" 2.4");
	#if ENABLED(NEXTION_GFX)
	  gfx.set_position(1, 24, 250, 155);
	#endif
}
else if (strstr(buffer, "4024")) {  // Model 3.2" Normal or Enhanced
	SERIAL_MSG(" 3.2");
	#if ENABLED(NEXTION_GFX)
	  gfx.set_position(1, 24, 250, 155);
	#endif
}
else if (strstr(buffer, "4827")) {  // Model 4.3" Normal or Enhanced
	SERIAL_MSG(" 4.3");
	#if ENABLED(NEXTION_GFX)
	gfx.set_position(1, 24, 250, 155);
	#endif
}
else if (strstr(buffer, "8048")) {  // Model 7" Normal or Enhanced
	SERIAL_MSG(" 7");
	#if ENABLED(NEXTION_GFX)
	  gfx.set_position(274, 213, 250, 155);
	#endif
}