Device Detection in USB Hubs

Lightning cables have the capacity to draw a small amount of current, even when no device is connected to them. This behaviour can cause a USB hub to interpret the cable as a device with a low power draw, resulting in the hub's LEDs turning on. Additionally, in the case of a Cambrionix Connect system, this may lead to the appearance of an "unknown device" in the interface.

This current draw is a characteristic of lightning cables, as they negotiate power automatically upon connection, regardless of whether a device is attached or not. Consequently, the hub may mistakenly identify the cable itself as an active device, despite the absence of any connected peripherals.