Just curiosity is all. What can we learn about how things are put together, can we modify things in any useful way, or can we make this platform work better for some users. I don’t know, and I won’t know until I look so… I’m looking. You can too!
Hi,
I’m new in this community. But I am doing IoT since years now.
My latest project is a central oil heater control with display.
So I am going to Use the first time a Nextion display. (Unfortunately I got a 3.5inch TCJ display from china)
I tried to read or the flash of the STM but it was read out protected. So I removed the ROD with openGDB successfully. So I want to flash a Nextion image to my display.
Has someone any idea how to obtain an image of a 3.5 inch basic Nextion .
Maybe out of a tft file?
Thanks
It seems like they have fixed this oversight in recent revisions unless I am doing something wrong.
So I was able to dump a 3.2 enhanced display.
it seems that the actual firmware is just a type of bootloader. The actual program is stored on the flash chip. Clearing and reflashing the firmware will reload the last .TFT that was stored on flash with the display information. The firmware is the same across TJC and Nextion. Even though the dumps are different, the flash program will readjust back to stock for the display.
Has anyone had any luck dumping the flash chip for the display? I believe I have hit a lack of knowledge road block.
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Well, I was about to post another bug to the Nextion forum and it seems I was banned from it for posting this in this forum. Good to know they have absolutely no tolerance for research.
I know this is an old thread plus I am new and pushing the limts of what is allowed but I hope someone can help.
While messing around I accidently relashed the STM32F030 on one of my Nextion boards and effectively bricked it. The other boards I own have Read-Out protection set so I can’t just copy from one to the other.
The board is a NX3224T028_011 but I suspect the same boot loader is used across all Nextion boards that use the same chip (pretty sure all it does is save and boot files thats are generated by the editor).
Would anyone have a hex or bin file they could share via a private message?
Are you sure that it’s worth the time and the work since you can easily get a new one for less than $20? How much is your working hour?
I read this as a hacker experimenting with the tools at hand, as opposed to making a financial model for the project.
It only takes a few minutes to flash a board, so that’s not an issue. Plus, ignoring the replacement cost I have an issue about throwing out perfectly good hardware!
Since time is not money for me at the moment, I just spent most of the day researching how to bypass read-out protection on the STM32F0 range for fun. So far that has been a failure due to my lack of python skills (search for Dumping the flash of the Syscan 2015 badge). I will probably try again tomorrow however I need to setup a Linux ARM development environment to try the same method using C code (search for Shedding too much Light on a Microcontroller’s Firmware Protection).
The joys of being told to stay at home 
2 Likes
Ok so I solved the problem and managed to get the code from the Syscan web page working.
All it took was a nights rest after which it took a few simple code line changes got the program to work properly. The code does require a buspirate as an interface which thankfully I just happened to have.
A couple of hours later and I now have a copy of the bootloader. This has been sucesfully flashed into my faulty board and it now works again!
3 Likes
Seriously above my skill level. Good to see there are folks that can figure out these things…in case I ever need it. 
Hey! I need your help! I didn’t accidentally save a hex file from stm32 when trying to upload a finished copy from another display. Can you share it?
Can you send me a hex file? So i can fix my Nextion instead of buying another one. Thank you.
[admin edit: link removed, see below]
Just a reminder here from the pinned topic:
A corollary to rule #1 - don’t post illegal content . That includes any copyrighted material belonging to Nextion, TJC, or whomever else.
We can’t be sharing copyrighted files, and that includes rips of firmware images.
1 Like
Hello Good-day brother… is it possible to use this Hex or bootloader on Nextion Basic 3.5 inch? can I offer sixpack beer in return? Thanks bro
Ola amigo, preciso de seus conhecimentos para outros assuntos entre em contato comigo por favor 11-995720340 grato
Ola amigo, preciso muito de seus serviços.
Entre em contato por favor 11-995720340 Vagner
Hi and welcome @vagnertecnico55!
It’s generally not a good idea to post contact information like this in a public forum. If you think that a certain member of the community can and would help you personally, you should write a direct message to them. If you need quick replies, you might also want to check our discord server.
In any case, it’s usually a good idea to write in the language everyone else uses (English in this case) and to give at least a brief description of what you need or are trying to do.
Kind regards,
Max
Hello. I burned the chip in NX4832T035. I bought new STM32F030C8T6 on ali. I thought it would be easy to program and now I see I need a bootloader.
Questions:
- Anyone have a bootloader for NX4832T035?
- Can this be programmed with St-link V2?