I am having trouble connecting more than 3 cameras stably to Zed Box Orin NX.
What is the maximum number of cameras for this model?
6xZED 2i cameras.
3x USB hubs (USB 3.2 Gen 1 Type-A), each having 7 identical slots.
I tried many connectivity configurations for 4x cameras and 6x cameras setups and always at least one camera disconnects.
Only for 3 cameras I havent seen this effect.
Hi @tony-pitchblack
Welcome to the Stereolabs community.
You cannot connect more than two ZED 2i cameras to the ZED Box because the Jetson Orin module has a single USB 3 channel. The bandwidth is not enough to handle more cameras.
When you add USB 3 hubs, you are not adding USB3 channels, but all the ports share the same channel and then the same bandwidth.
This is a limit condition. It could work for limited combinations of grab rates and resolutions.
Hi. Thanks for reaching out.
If I am calculating correctly (link) a single USB 3.1 Gen 1 channel should be able handle up to 7 cameras in 720p@30.
But the error I am getting arises even before I try to launch any recording.
I simply reboot the device, then in python import pyzed and check available cameras - one or more cameras are ususally not listed as visible even though they are physically connected and visible via other cli linux tools like lsusb.
Bandwidth is not the only limitation. Also power can cause this kind of issues.
Are the USB3 Hubs externally powered?
The usb hubs are externally powered and the cameras seems to be drawing the power from the hub according to ChatGPT analysis (link) of the logs (link).
Cant be sure though - I used simple utilitily uhubctl, let me know if there are more advanced ways to confirm this.
Also would greatly appreciate if you would be able to extract any other insight from the attached logs or point to further resoruces for debugging or confirming hardware-level limitations of my current setup.
The logs show no more information than what I’ve already said.
Cameras are detected, then disconnected because the bus cannot support them all.