OAK-FFC-4P does not detect cameras

christoph

Hi,

I just got a OAK-FFC-4P with four OAK-FFC-OV9282-2 cameras. I connect all of them up and try to get data. I connected them as following

According to the LEDs it seems like the OAK is getting sufficient power. I am able to connect to the FFC device, but for whatever reason it does not seem to detect a single camera. My host computer is Ubuntu 22.04. I see under lsusb

Bus 003 Device 030: ID 03e7:f63c Intel Luxonis Bootloader

I also added the udev rules for /etc/udev/rules.d/80-movidius.rules. When I run cam_test.py I get

/bin/python3 cam_test.py --cameras rgb,m right,m left,m camd,m
Enabled cameras:
    rgb : mono
  right : mono
   left : mono
   camd : mono
DepthAI version: 2.20.2.0.dev+9a1a60cf5e177c92c98cd3b966acff9e3940e2d2
DepthAI path: /home/u/.local/lib/python3.10/site-packages/depthai.cpython-310-x86_64-linux-gnu.so
[1844301031EBCB0F00] [3.1] [4.301] [MonoCamera(8)] [error] Camera not detected on socket: 3
[1844301031EBCB0F00] [3.1] [4.302] [MonoCamera(6)] [error] Camera not detected on socket: 1
[1844301031EBCB0F00] [3.1] [4.302] [MonoCamera(2)] [error] Camera not detected on socket: 0
[1844301031EBCB0F00] [3.1] [4.303] [MonoCamera(4)] [error] Camera not detected on socket: 2
Connected cameras:
USB speed: HIGH
IR drivers: []
Cam:      rgb           right         left          camd     [host | capture timestamp]
FPS: 0.00| 0.00| 0.00|  0.00

When I just print the device it shows

[DeviceInfo(name=3.1, mxid=1844301031EBCB0F00, X_LINK_UNBOOTED, X_LINK_USB_VSC, X_LINK_MYRIAD_X, X_LINK_SUCCESS)]

Any suggestions? I hope there I did not miss something obvious or there is a hardware issue?

erik

Hi christoph ,
I am not entirely sure. It looks like you connected cameras correctly, and command/cam_test execution was correct as well. 2 notes; could you try with latest main branch, and could you try with USB3 cable?
Thanks, Erik

christoph

Hi Erik,
I compiled the last main and ran it again. Basically the same output

I also tried different cables. Seems to make no difference as well. The communication to the FFC seems also fine, so I hope this is not the issue.

Any other suggestion? Anything I could check on the Hardware maybe.

Best,
Christoph

erik

Hi christoph ,
Sorry about the issue, after checking a bit closer it might be that you got FFC camera modules that have ERRATA - could you check the markings on the voltage regulators?

If that's the case, you can either cut the pin, or we can send you replacement camera modules.
Thanks, Erik

christoph

Hi Erik,

thank you the information.

So I definitely have the K28 mark on the voltage regulator U3 of all four cameras I do have. It seems like Pin 4 is already disconnected. I did not disconnect it, I guess it was delivered like this. It seems like I still have the issue that it is not detected. If it is possible it would be great if you could sent 4 new ones, what would be the approach to get them replaced?

erik

Hi christoph ,
Please send an email to support@luxonis.com and we will take care of this issue.
Thanks, Erik

christoph

Hi Erik,
so I got the replacement cameras, same issue. I think something is seriously wrong here. I realized that my SOM and FFC Board are turned 180 degrees to the picture on your website https://docs.luxonis.com/projects/hardware/en/latest/pages/DD2090.html. I added a picture to this thread so you can see it. I was wondering if you guys reworked the carrier board so that the SOM is switched 180 degrees now or if I got the part incorrect delivered? Is it save for me to turn the SOM, just wanted to verify, before I break something.

erik

Hi christoph , The SOM looks good, what about cable connection - are they correct?

christoph

Hi erik,
I connected them similar to the picture above so I am pretty sure they are correct. For me it seems like the OAK FFC is working, at least the python examples are able to connect to it. Is there any way to check the subsystems individually? So we could at least see where the issue is coming from? My first idea was to connect the cameras to a rpi, just to see if I get a picture, but they seem to have a different size connector, so maybe this is also not a possibility. Could I flash the SOM Pro again and give this a chance, I am not sure if this is possible.

erik

Hi christoph ,
Could you share again output of cam_test.py script eith the latest main version of depthai?
Thanks, Erik

christoph

Hi erik,

so I went into depthai-python, pulled the last main, installed it wit pip and this is the output .

erik

Hi christoph ,
Perhaps the reworked units weren't properly tested, but no other customer reported this issue - so it's strange it doesn't work as expected. If you have tried different cable connections (so it's connected properly), perhaps best if you send email to support again, and we'll try to send you units that weren't reworked.
Sorry for the inconvenience.
-- Erik