OakViewer can't connect to Oak 4 camera

oakleydoakley

I have an Oak4D camera. It is connected via POE+ to a staticIP (I followed the procedure to set a static IP). However, the OakViewer doesn't connect to the camera when entering that IP address.

I'm also not able to run simple python test sample codes to view the camera feed. I get an error regarding XLinkOut: xout = pipeline.create(dai.node.XLinkOut)
^^^^^^^^^^^^^^^^^
AttributeError: module 'depthai.node' has no attribute 'XLinkOut'

Spec details:

Camera Os: 1.30.1
OakCtl version: 0.18.6
DeptAI 3.5.0
Python 3.11

Oskar-Luxonis

Hey oakleydoakley - you’re hitting two different issues here.

The AttributeError: module 'depthai.node' has no attribute 'XLinkOut' means you’re trying to run an old v2-style sample with DepthAI v3. In v3, XLinkOut is no longer created explicitly, so for OAK4 + depthai==3.5.0 you should use the v3 examples from depthai-core, not older depthai-python examples.

For the PoE/static IP side, first make sure your host is actually on the same subnet as the camera, then check whether the device shows up with oakctl list. If ping works but OAK Viewer and DepthAI still can’t connect even when you specify the IP, that usually points to a bad network/setup state on the device, and the next step is to re-run OAK4 setup or do a factory reset and configure it again.

OAK4 setup docs with troubleshooting here.

Thanks,
Oskar

bradon

I ran into a similar issue of OakViewer suddenly not reaching the device, The first time I sertup my camera after I updated from 1.32.1 to 1.40.0 it did actually connect to the oak viewer just fine no issues but then I accidentally added it to the luxonisHub.. which tossed chaos into the whole thing, and I didn't really want to do, so I reverted back without the hub and re-installed everyhing the best I could.. this is the current state from oakctl. it seems to recognize the camera and I can PIng the IP address just fine.

Oak viewwer 3.8.2

Oakctl 0.29.0

I followed the troubleshooting here.

so I tied to also uninstall and re-install the oak viewer software also. then disable the firewall and turn off wifi still doesn't connect.. is there a manual device add button where I can just plug the camera IP address in? The camera has a blue solid light like it is waiting to connnect, but its not connecting and I can't seem to get any information from this camera.

bradon

I did check the camera connection to the OakViewer today through USB connection and that was successful and workfed fine.

This points to a problem with windows network POE settings in connection to the oakviewer app, but I've tried all the networking troubleshooting steps, disabled wifi, disabled firewall, oakctl can see the camera and I can ping the camera's IP address it all seems to be connected, and recognized on the network. I have tried connecting the camera directly into the network port on the PC and also connecting through my router, but the OakViewer will just not pick up the camera as a recognized device, even though oakctl can see it as a listed device.

The crazy thing is a week ago it used to connect just fine, its only when I re-setup the camera and installed to the latest OS that this non-recognized device issue has shown up.

Oskar-Luxonis

Hey bradon - since OAK Viewer connects to the camera over USB, the camera and Viewer installation are working. This points to a PoE network-discovery issue rather than a Viewer version issue.

First, please update oakctl:

oakctl self-update

oakctl and OAK Viewer use different discovery methods: oakctl list uses mDNS, while OAK Viewer uses DepthAI discovery. Therefore, oakctl list and ping can work even when OAK Viewer cannot find the device.

Please follow the checks in the OAK Viewer device-discovery troubleshooting guide, especially the same-subnet, VPN, interface-routing, UDP 11491, and TCP 11490 checks.

Could you also test the underlying DepthAI connection from the same PC? With depthai installed, run:

depthai cam_test -d <MXID> -stereo

Use the MXID shown by oakctl list. Please share the full terminal output if it does not connect.

Thanks,
Oskar

bradon

Camera and host tools are the latest versions
Camera and host are on the same subnet
Ports are open. I tested 11491 UDP and 11490 TCP connections with PCs across the network to verify. Even tried disabling the firewall completely on the host.
No VPN is used
Only 1 network adapter is active on the host
The network switch is unmanaged

depthai cam_test -d <MXID> -stereo

Unfortunately, Oakctl can see the camera but nothing else can. It didn't work; I'm still at a loss for how to get this device to connect.

Oskar-Luxonis

bradon - thanks for the screenshot. It confirms that oakctl can find the camera, but DepthAI cannot: depthai -l is empty and cam_test reports no available device. This is below OAK Viewer itself.

Please first check whether an app is running on the camera:

oakctl app list -d <camera-IP>

If it shows any installed or running app, please share the output before making changes.

If no app is running, or oakctl app list cannot access the device, please perform a full factory reset, then configure the camera again and retry over PoE. A factory reset deletes the device configuration and user data. The reset steps are in the OAK4 setup guide.

Thanks,
Oskar