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Something like ft232r US $1.14 |High Quality FT232RL FT232 FTDI USB 3.3V 5.5V to TTL Serial Adapter Module Mini Port|Integrated Circuits| - AliExpress

My guess would be the three soldering islands CN11, but I am not sure. For my board they were in a similar position see first post. I have corrected the image links.

This for me will create a file with all zeros. except the last byte --> bs=1 count=1 Try the following this will add zeros to the end of u-boot.bin until it reaches the size 16777215 truncate -s 16777215 u-boot.bin

No, at least not on my firmware and others also not that would be not logical. It would normally always start at 0x0 maurice@maurice-N73SM:~/Downloads/extract$ binwalk u-boot.bin.img DECIMAL HEXADECIMAL DESCRIPTION...

Yeah, you should do that for all the files to get the complete flash. You also could try uboot first and see if that works. Then flash the rest from the uboot shell. To clarify: The user-x.cramfs.img was just an example file.

For some reason I cannot read the flash in u-boot when starting at ie 0xb10000 where the web squashfs files starts. It gives me an "ERROR: read/write area is out of range!" I only can read part of the flash, which is weird. It seems locked. So sadly I can't help you with that, however you can...

@runekyndal It loads the kernel (zImage) from the romfs image. See the output of the serial console. So if you already reflashed the romfs image, and it still doesn't want to boot the kernel, you are using the wrong firmware. find_squashfs_file: name bin, start_block 0, offset 2676, type 1...

If someone wants to build a box with a 3D printer for the NBD8008R - 3536DV100 V1.01 print I have designed a simple one Search Thingiverse - Thingiverse Tinkercad links are also there so you can customize it. There are 3 parts bottom, top and back. HDD can be screwed to the top.

@Nyat Huy, that is what I mean. You can get the right files from the firmware file. General_General_NBD8008R-PL_V4.02.R11.7601.Nat.OnvifC.20180901.bin Just unzip the .bin to get the below files and then flash them in uboot. Reflashing romfs, web and custom should get you going again...

@kirikomori Thanks for the diagram, I can use that to control the menu with my raspberrypi. @Nhat Huy What do you exactly want? You can just download the firmware and unpack it to get the hex data.

A little info on where the settings of the NVR/DVR are stored: In /mnt/mtd/Config/Json are gunzip compressed Json files which contain the settings. NetWork is one of those files it will contain your cams ip and passwords in plain text once unpacked. The .second files are I guess backups. Note...

Hmm again an OTA update This time we also have a newly build kernel. ~ # cat /mnt/custom/FirmwareInfo NET_UPGRADE_FILE=General_General_NBD8008R-PL_V4.02.R11.7601.Nat.OnvifC.20180905.bin BURN_FILE=upall_General_General_NBD8008R-PL.7601.Nat.OnvifC.20180905.bin ~ # uname -a Linux localhost 4.9.37...

My thoughts, about the device/software after playing around with it. The software/firmware is pretty solid and also looks secure especially when you look at china devices a couple of years back. When the Sofia program is started with dvrhelper it will kill any existing telnetd. (using openssh...

I got an over the air update today on the device, so I will do a little write up on how to extract the new firmware from u-boot and upload it to the tftp-server. Make sure you create a filename in the tftp folder from the server that is named the same way you want to use in u-boot to save your...

Just collecting the information here, found a nice python based device manager tool NeiroNx/python-dvr from NeiroNx on github. When I am making some serious progress I can add it all to the wiki in some nice logical order. BTW the tool can also be used on the command line and what is most...

Another little update: Installed Entware/Entware on the device, just for trying out some things. Programs I installed through entware like ffmpeg, nano work fine. This saves me some time to go through the trouble of building my own with a crosscompiler ( I can still do that if it is needed)...

@alastairstevenson Yeah, already got the busybox version busybox-1.29.2 To install it I had to do it a bit different, because of the squashfs filesystem which is readonly and there is no overlayfs present. Also there is not a lot of room on the device, this can however later be easily solved...

Hmm a little set back, I was afraid of this, the recording hdd is written to directly. It doesn't use a filesystem. Although it should be possible to retrieve data from the drive it won't be of use for me. I just wanted to share it across the network, which is easy todo when it was using some...

@alastairstevenson Well all ready had some experience with embedded arm devices, although it was quite some years ago. The serial port ttyAMA0 is correct, why it doesn't output the kernel messages there, I am not entirely sure. Maybe in the kernel it is somehow disabled. Telnetd crashes when I...

Time to write some progress down on how to flash a modified rootfs to the device. Extract the firmware, I used sudo, because I am afraid of loosing file permissions ownership of files. Didn't check yet if it is true, but for now just in case. I used dumpimage like always on linux there are a...

@alastairstevenson Thanks for the link and also for the root password. It was on my todo list to bruteforce the hash. Oops, had the tx wire wrong. that is why I couldn't interrupt the boot. I tried setting ptzsupport, it wasn't set and it also didn't have any effect after setting it. I will...

@alastairstevenson Thanks for the info, however that would mean rebuilding the firmware and flashing it? I still need to investigate more to see what is in the headers I ignore when unpacking, else I could be left with a bricked device. I noticed that there is telnetd available in the firmware...

Ahh that was pretty easy binwalk user-x.cramfs.img DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------------------------------------- 0 0x0 uImage header, header size: 64 bytes, header CRC: 0x6EF60315, created: 2018-07-19...

A little follow up. I have currently the following firmware installed. General_General_NBD8008R-PL_V4.02.R11.7601.Nat.OnvifC.20180719.bin The .bin seems to be just a compressed zip with below files. 7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18 p7zip Version 9.20...

Zoneminder seems to be one of the popular ones. ZoneMinder - Home I didn't use it myself, I know there are also some others around, but can't remember their names right now.

Hi, first post here. I was looking for the rs232 connection on my newly bought NBD8008R - 3536DV100 V1.01 Hangzhou Xiongmai First I was looking at the 4 pin connector CN4, but that seems to be a USB host. I finally found some chinese description online It wasn't quite the same board, but...