[Greg McKaskle]

Many of the USB cameras seem to turn off their LED and take a nap if nothing opens a session to them. I don't know this behavior well enough to use it as a general debugging diagnostic, but you may be able to compare the LED behavior between the working system and the nonworking system.

For example, if the LED immediately lights up on the working roboRIO and never lights up on the competition robot, there may be a power issue, and it may make sense to ensure that the USB host port still works. If the LEDs turn on, but go off after awhile when no code is running, and that matches the competition bot, that may tell you that the code isn't keeping a session open, and time to break out the debugger.

Also, the roboRIO web page will show you how USB devices are connected, so it should show up on the left list. And Vision Assistant will let you test and configure the USB camera plugged into a roboRIO. When you launch it, choose to acquire images, double click the second camera type which includes USB and IP, then on Target, type in the name or IP of the roboRIO. The list beneath should show the UVC/USB camera, and you can select it and click the play triangle to start getting images from it.

Greg McKaskle