Problem with Nextion library upload example

Using Arduino Displays
1

Greetings,
I was trying to upload a tft file to nextion using Arduino Mega and SD card module with Upload example provided by Nextion library.. Here is my code:

#include "NexUpload.h"
NexUpload nex_download("test.tft",53,115200);
void setup() {
  // put your setup code here, to run once:
    nex_download.upload();
}

void loop() {
  // put your main code here, to run repeatedly:
}

This returns:

12:32:00.184 -> start _checkFile
12:32:00.184 -> file is not exit
12:32:00.231 -> tft file size is:
12:32:00.231 -> 0
12:32:00.231 -> check file ok
12:32:00.916 -> get baudrate error

Any ideas?

Thanks.

2

is you screen configured at 9600 bauds and connected on pin 2 (Arduino Rx) and 3(Arduino Tx) ?

3

Thank you for the reply,
I am using Arduino Mega hence it is connected to 16(Arduino Rx2) and 17(Arduino Tx2) and screen is configured at 115200.

4

I'm not using their stuff but I would look into NexUpload.cpp to see the assumption they make.

How does the code know the screen is on Serial2?

5

Default conf file for this library, is for mega and it is on Serial2:

/**
 * Define nexSerial for communicate with Nextion touch panel. 
 */
#define nexSerial Serial2

Btw, I can manipulate a text field on Nextion through Arduino, which means Serial communication is established.

6

OK

the error message you see

12:32:00.916 -> get baudrate error

comes from here

    if(_getBaudrate() == 0)
    {
        dbSerialPrintln("get baudrate error");
        return;
    }

so for some reason _getBaudrate() returned 0

7

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.