Re-organized the forum to more cleanly delineate the development section, as the end user support side appears to have taken a life of its own!

Author Topic: GRAIN 8135S CPU SDK  (Read 19478 times)

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August 06, 2016, 09:19:51 am
Hello, I've recently got a nice IP camera based on this chip: GRAIN 8135S.
As usually with these Chinese chips there is not much info much less a publicly available SDK even if this should be mandatory for the GPL part of the software (most of it).
I've seen that there available on the ftp server a SDK for an older version of this chip: GM8126 and I would like to get the one for the GM8135 but as usually even if Baidu finds the kit downloading it's impossible for a non-Chinese speaking person.

If some kind soul has this kit and wants to share please PM me, I can even compensate your efforts a bit.

 Thanks in advance, Mircea

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August 22, 2016, 06:57:36 pm
Good day all!

Have you got anywhere with this ???  (Grain GM8135S) SDK.  I've also got a bunch of these cameras.  The first issue I found when I hooked them up.  Was I had no direct connection to them.  I stuck them behind my analytical firewall and found when I could connect, I did so thru a foreign IP.  The only time I could really "Connect" to them was a simple ping.  Getting images from them took me to a weird IP, at which time I could get the 'live' images and play with the PT.  I therefore took one of them apart and was surprised to find that on the inside, one of the 'Antenna's' was not even connected.  (No wires even).  This got me much more curious, so I killed that specific IP on my firewall, and bango.  I could not talk to any of my cameras.  I could still ping them, but all the ports (There were only two) were shut down, and no video/audio to or from.  So my next idea was to flash a proper firmware.  That brings us to this topic. 

If anyone has any suggestions to firmware(s) to try, SDK's to play with, etc.  Any help would be appreciated.

There are some interesting jumpers available on the main board, as well as some 'Missing' hardware.

I would be more than happy to share what I've found out so far about this particular IP camera.

Oh, and the best 'Model' I've come up with is the 'yoo-see' from china (of course). 

Again, I would be more than happy to share my findings and pictures if anyone is interested, and if anyone has any suggestions to try on this interesting PoS.


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January 02, 2018, 03:36:29 am
Hello folks,

Any progress with this cam ;-)? This is the only place I could find anything about the YooSee cam. It's a Techage 1080p and their web site actually contains some firmware files; I've tried this one:

After unpacking, the .bin file can bin uncompressed with 7z unpacker. There are then a few .sqsh4 files, which are mountable with the squashed filesystem type under Linux. Then one can find the scripts under etc/rc.local and a few commands for flashing the FW.

I've opened the box; be careful not to break the clumsy camera cable socket lock (happened to me of course). There are a few anonymous chips but the most important is:
- CPU: ARM Grain 8135S
- WiFi: Realtek 8188 FIV
- Eth: IC IP101GR
- Serial Programmer: 24C08E 735D2

To be able to brute force flash it, one probably needs to go through the 24C08E:

I didn't figure out so far how to communicate with it; it seems to be "write-only" (?) reading the docs.

I didn't plan to reverse this but the stupid thing has NO open ports but the dummy RTSP (which sends nothing of course) and the bloody thing sends all the audio/video stream straight after turning ON to the internet. Their CMS connects then there and reads the streams back to your LAN to see anything.

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April 15, 2018, 07:42:58 am
I to have a CCTV camera with this chip and have noticed that the manufacture has blocked or failed to install a Web interface so that users could configure the camera settings.  I've contacted the manufacture and they refuse to help.

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June 07, 2019, 04:25:50 am
I think the same way as you.