Video tutorial displays NEXTION

I don't really know what arduino code should look like for this to work.

Have you watched In each episode, you have the arduino code described and explained. Start with the first episodes and then about text boxes.

Greetings

Hello - I have a question whether it is possible to change the color of the entered variable when calling the numeric keyboard.
Regards Jacek.

Hello, with what command from nextion after serial send the end of line chr (13)
Regards Jacek.

I am looking for a batch for the 25Q32 memory in Nextion NX3224T024_011. The symptom is that once a white image appeared, I uploaded it
from the SD card again its copy and everything was OK. Unfortunately, after turning off the display again from the same card, the image did not want to be uploaded. Same with other images. I suspect that the flash memory mentioned at the beginning spilled out. Unfortunately, I do not have a second such display to copy from it and upload to the damaged one. I read on some foreign forum that someone had a similar case, but I didn't come across the batch. Maybe someone has the ability to make a backup of this memory for this display model.

But there is nothing there, in this memory there is only the program / project uploaded. It's different if you were asking about the bootloader but it's sitting in STM-e.

Thanks for the quick reply. Unfortunately, I did not know this and I suggested this discussion on a foreign forum and I thought it was like in such memories in radiotelephones with which I played a bit. Is there any advice for this situation. Until now, when I inserted a card with an image, there was a text about loading and this time silence, white screen and that's it. Is it possible to restore this bootloader, because perhaps something happened to it and the image does not load. I don't know how the mechanism works.

Yes, you can re-upload the bootloader when you find it, unfortunately, I only have the NX3224K024 version, but I don't want to believe a bit that the suspicion is rather on a damaged SD card.

I've just tried three other images on different cards and nothing. The first card could be loaded after the first display pad, while the second time, i.e. with the next white screen, nothing could be done, as well as with the other images that could not be uploaded.

And what cards are you using?

Samsung and SanDisk - 1GB. It even occurred to me to upload the image via the UART interface if I remember correctly, because I haven't done it for a long time and I have to remember. Maybe something is an SD card reader.

Try it won't hurt. In principle, it's easy to upload if you have a USB-UART adapter, but the speed is not great.

I remember something, that it was going slowly along this road, but if only it happened, it would be something. I just need to find that interface, but I'll probably do that tomorrow. If I have any success, I will write. Thanks for your help so far and best regards.

Added after 30 [minutes]:

Because I am quite an impatient person and according to the principle of what you have to do tomorrow, do it today, so I did. I found the right adapter, editor and the image I was after but lost. Everything started beautifully with the message that it will last 300 seconds and everything reached the final without any errors, but the display remained white.
It follows that something happened to the display itself, hence the negative effect when uploading from the card. There is probably nothing that can be done about this problem, anyway I have no more idea and now I'm really done and thank you again for your time.

Is it possible to replace the damaged Nextion (more expensive) with a cheaper display module - e.g. 2.8" 240x320 SPI TFT LCD - ILI9341?

You can, provided that you write its support in your microcontroller and you have how to connect it via SPI.

Regards

Thanks for the answer. That's how I thought it wouldn't be that easy and writing programs is beyond my reach.
Regards