Connection Refused with Luxonis OAK-D Pro Auto Focus using Gen2 TCP Example

edensheiko

Hi all,

I'm working with the Luxonis OAK-D Pro Auto Focus and trying to connect to it using the gen2-poe-tcp-streaming example. I've set the camera's IP to be static at 192.168.68.126, and I’m running the following setup:

The camera is connected to my router via Ethernet, and I’m also connected to the camera via the USB programming port for development.
I run the oak.py script on the camera and try to connect using port 55551, but I keep getting a ConnectionRefusedError.

Here’s the error I get when running host.py on the host machine:

$$
Traceback (most recent call last):
File "C:\Users\edens\PycharmProjects\OAK_Camera\depthai-experiments\gen2-poe-tcp-streaming\host.py", line 20, in <module>
sock.connect((OAK_IP, 55551))
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it.
$$

Additional details:

The OAK camera has a static IP (192.168.68.126), and I’m connected to it via USB.
Bootloader Warning: I’m seeing a warning about the OAK bootloader being version 0.0.25, and an upgrade to 0.0.28 is advised. Could this be related to the connection issue?
I've tried connecting on both port 5000 and port 55551, but neither works.

Any suggestions on why the connection is being refused or if there’s anything else I need to configure?

Thanks in advance!

jakaskerl

edensheiko
If you connect to the device VIA programming board, it will force it to use USB. In this case ETH comms won't work.

edensheiko The OAK camera has a static IP (192.168.68.126), and I’m connected to it via USB.

I hope it is in the same subnet as your PC

edensheiko Bootloader Warning: I’m seeing a warning about the OAK bootloader being version 0.0.25, and an upgrade to 0.0.28 is advised. Could this be related to the connection issue?

It's not related, but updating the bootloader is recommended for stability improvements.

Unplug the programming board and device should start to work properly.

Thanks,
Jaka

edensheiko

jakaskerl

Hi Jaka ,

Thanks for the response

I’m using the OAK-D Pro PoE (forgot the Poe), and I noticed the following issue: when I disconnect the USB programming port, the device stops receiving pings via Ethernet. However, when the USB is connected, it starts receiving pings again.

Additionally, I'm seeing repeated failed TCP connection attempts (SYN packets followed by RST, ACK responses). Could this be related to the camera's interface switching between USB and Ethernet? Do you have any recommendations to ensure it uses Ethernet for communication when the USB is disconnected?

Thanks for your help!

link for pic:

https://ibb.co/NyGQyqC

Eden

jakaskerl

Hi edensheiko
You are using a POE switch or injector right? Check power.

edensheiko Additionally, I'm seeing repeated failed TCP connection attempts (SYN packets followed by RST, ACK responses). Could this be related to the camera's interface switching between USB and Ethernet?

Yes, it probably is.

edensheiko Do you have any recommendations to ensure it uses Ethernet for communication when the USB is disconnected?

https://docs.luxonis.com/hardware/platform/deploy/poe-deployment-guide/ should be all you need.

Thanks,
Jaka

edensheiko

jakaskerl

Hi Jaka,

Thanks for the answer. Yes, I’m using an M12 PoE connection to my router, and the M8 port is connected to a USB programmer that links to my PC.

Regarding the repeated failed TCP connection attempts, I suspect it’s due to the camera’s interface switching as you mentioned. Do you think configuring the system to prioritize Ethernet when USB is disconnected might resolve this?

I’ll take a look at the PoE deployment guide, thanks for sharing it!

Best,
Eden

jakaskerl

edensheiko
I have a feeling you are not powering the device via POE, but rather through the USB (which is why your device becomes partially accessible when plugged in via USB).

There is currently no way for force ETH comms when usb is plugged in,.

Thanks
Jaka