NEXTION + Rumba

I am new to this group. Greeting from Australia.

The problem is that I am unable to see pass Marlin Kimbra "connecting..." loading screen after I connect pins PD2 and PD3 for RXD1 and TXD1 at EXP1 header on my Rumba+ board. Also use 5v and GND from EXP1 header to power the display. I also uncomment NEXTION and use Serial 1 which I assume EXP1 is serial 1? The loading screen just hang which I assume the pins are incorrect and the configuration_Pins.h is wrong?

The firmware I downloaded is v4_3_3 using the configuration tool [marlinkimbra.it]

Is there specific step I have to take to get the display and board to working properly?

It would be great if anyone help me solve the problem?


// CONTROLLER TYPE: Serial display

// Nextion 4.3" HMI panel model NX4827T043_11
#define NEXTION
// Define Serial it use
#define NEXTION_SERIAL 1
// Define ms for update display (for 8 the default value is best, for 32 bit 1500 is best)
#define NEXTION_UPDATE_INTERVAL 3000
// For GFX preview visualization enable NEXTION GFX
//#define NEXTION_GFX
// Define name firmware file for Nextion on SD
#define NEXTION_FIRMWARE_FILE "mk4duo.tft"

// Show a progress bar on HD44780 LCDs for SD printing
//#define LCD_PROGRESS_BAR
// Amount of time (ms) to show the bar
#define PROGRESS_BAR_BAR_TIME 5000
// Amount of time (ms) to show the status message
#define PROGRESS_BAR_MSG_TIME 1500
// Amount of time (ms) to retain the status message (0=forever)
#define PROGRESS_MSG_EXPIRE 0
// Uncomment this to show messages for MSG_TIME then hide them
//#define PROGRESS_MSG_ONCE
// Add a menu item to test the progress bar:
//#define LCD_PROGRESS_BAR_TEST

If you look this [reprap.org]
TXD1 e RXD1 on mega are pin PD3 and PD2 and on rumba are LCD D4 and LCD RS, You can find these pins on EXP2.
These pins are serial hardware, they do not need to be mapped, they're just that.

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Alberto C. felice possessore di una Kossel K2
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Thank for the link MagoKimbra. Much appreciated .


Previously I connect PD2 (RXD1) and TXD1 (PD3) which cause the hang at loading screen so I reverse that by connecting PD2 (TXD1) and PD3 (RXD1). Finally it went through the loading and onto the menu. I am happy man!