Hello. thanks for the link, but i have that link. they sent it to me a few days ago. but they told me that I can no longer upload it to my chip. i have to desolder it then program it and resolder it.
"Igor, [01.08.22 12:16]
Encrypted bootloader 😞 Only desoldering and programming

Igor, [01.08.22 12:22]
1. make a dump of the current state of the chip and make the second copy of this dump for working
2. unpack firmware to separated images (.bin firmware file is ZIP-archive, which contains several .img files)
3. cut off the first 64 bytes of each of these images
4. place some of these cut images to the dump (you must find exactly offsets in the dump)
5. erase the chip
6. write re-mastered dump to the chip
7. solder the chip to the camera's PCB"

They told me that it is better to buy a new board.


"Igor, [01.08.22 12:16]
Encrypted bootloader 😞 Only desoldering and programming

Igor, [01.08.22 12:22]
1. make a dump of the current state of the chip and make the second copy of this dump for working
2. unpack firmware to separated images (.bin firmware file is ZIP-archive, which contains several .img files)
3. cut off the first 64 bytes of each of these images
4. place some of these cut images to the dump (you must find exactly offsets in the dump)
5. erase the chip
6. write re-mastered dump to the chip
7. solder the chip to the camera's PCB

Igor, [01.08.22 13:06]
You can buy new camera PCB on Aliexpress.com for less than $15. And this will be a very good way to solve your problem.

Igor, [01.08.22 13:42]
For example: https://aliexpress.ru/item/1005002782438663.html

Igor, [01.08.22 13:53]
Your old PCB is marked as "BLK550AI". It means that PCB uses XM550 CPU.
So you can replace this PCB with many other PCBs. For example there is a new CPU named NT98562. You can buy this PCB and connect to it all your equipment from old camera - lens, IR-CUT module, Wifi-board, Zoom board, POE board etc."

Can it become your board? They said it would?