Device connected in USB2 mode! This might cause some issues (OAK-D S2)

JetForMe

I just got my OAK-D S2. I've connected it to an M1 MacBook Pro and installed the python tools. When I run the Getting Started examples, I get:

% python
Python 3.12.2 (main, Feb  6 2024, 20:19:44) [Clang 15.0.0 (clang-1500.1.0.2.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from depthai_sdk import OakCamera
>>> 
>>> with OakCamera() as oak:
...     color = oak.create_camera('color', resolution='1080p')
...     oak.visualize([color])
...     oak.start(blocking=True)
... 
…/OAK-D/.venv/lib/python3.12/site-packages/depthai_sdk/oak_camera.py:219: UsbWarning: Device connected in USB2 mode! This might cause some issues. In such case, please try using a (different) USB3 cable, or force USB2 mode 'with OakCamera(usb_speed='usb2') as oak:'

I've tried this with the included cable via a USB hub, and a couple different USB-C cables directly connected to the MacBook Pro. The warning implies a less than optimal connection.

jakaskerl

Hi @JetForMe
You can check the speed with luxonis/depthai-experimentstree/master/random-scripts#oak-bandwidth-test to make sure.

Thanks,
Jaka

JetForMe

% python oakbw.py
Downlink 359.5 mbps
Uplink 300.1 mbps
Press any key to continue...

Both with and without adding maxUsbSpeed=dai.UsbSpeed.SUPER_PLUSto the Device constructor.

jakaskerl

Hi @JetForMe
That makes sense, but I'm not sure what the cause is. I'm very doubtful it's the device, so either the USB (still, even though you changed it) or MBP (some weird USB bandwidth block - since I can confirm it works great for me).

Thanks,
Jaka

JetForMe

I've tried with several different USB-C cables, including a known good 20G one I use to connect a 10G SanDisk external SSD.

The OAK-D shows up like this:

Movidius MyriadX:

  Product ID:	0x2485
  Vendor ID:	0x03e7
  Version:	0.01
  Serial Number:	03e72485
  Speed:	Up to 480 Mb/s
  Manufacturer:	Movidius Ltd.
  Location ID:	0x02100000 / 1
  Current Available (mA):	500
  Current Required (mA):	500
  Extra Operating Current (mA):	0

Whereas my SSD shows up like this:

PRO-BLADE Transport:

  Product ID:	0x205f
  Vendor ID:	0x4791
  Version:	40.05
  Serial Number:	<redacted>
  Speed:	Up to 10 Gb/s
  Manufacturer:	SanDisk
  Location ID:	0x02200000 / 1
  Current Available (mA):	900
  Current Required (mA):	896
  Extra Operating Current (mA):	0

This is on one of the Mac’s USB 3.1 buses.

erik

Hi @JetForMe , Could you try with some other computer? It might also be the USB-C connector on the OAK, or perhaps the connection isn't good between cable and connector, so only USB2 lines are connected. If it's connector, we can replace the device (send email to support@luxonis.com after reconnecting/trying with different computer).
Thanks, Erik

JetForMe

I've tried it with two of the three ports on the MacBook Pro. I've also successfully connected other devices to the MBP at high speed (as shown above). I doubt it’s the Mac. But I pulled out my previous MBP, an Intel MacBook Pro with four USB-C ports. It also shows up as a USB 2 device (480 Mb/s).

I don't know if it might be the firmware on the device?

jakaskerl

JetForMe
Hi looks like a HW fault then. Could you write to support@luxonis.com so we can replace the device. Make sure to link this thread along with the request.

Thanks and apologies for the inconvenience.
Jaka

JetForMe

Okay, I've sent the email. Got a quick response saying to just ask Amazon for a replacement. I've ordered that, should be here in a couple days. Thanks.

JetForMe

My replacement camera arrived, and it still connects as USB2. Unless this was a known issue with the manufacturing of your cameras, I'd be surprised that they both had a problem. It must be a software issue, no?

erik

Hi @JetForMe ,

Movidius MyriadX:

  Product ID:	0x2485
  Vendor ID:	0x03e7
  Version:	0.01
  Serial Number:	03e72485
  Speed:	Up to 480 Mb/s

Disregard this msg, as it's bootloader, and it will always show up as usb2. After uploading the pipeline + FW, it will switch to USB3 (if possible). Have you tried USB bandwidth test with the new camera?

JetForMe

erik Yes, above: https://discuss.luxonis.com/d/4726-device-connected-in-usb2-mode-this-might-cause-some-issues-oak-d-s2/3

erik

@JetForMe I mean with the new cam?

JetForMe

Ah! Sure enough, the new one does connect at 5 GB/s and has much better bandwidth test numbers:

% python oakbw.py          
Downlink 1860.2 mbps
Uplink 1664.8 mbps

(BTW the formatting controls on this forum really suck. I can't precisely set just a portion of the text to code block style, as evidenced above by the English sentence. I'm trying to format only the python output, but it insists on doing both. I'd highly recommend changing the forum to Discourse, but at the very least maybe there's an update for whatever you use that fixes this issue? Safari 17.5 on macOS 14.5)

jakaskerl

JetForMe
It's standard markdown. If you wrap your text in code block, then it will be rendered as code block. Nothing wrong with the forum (apart from missing button for code-block).

code or whatever
.
.
.

Bottom text.

Thanks,
Jaka

JetForMe

Oh, that’s

great!