So your Bluetooth thing can be connected directly to a UART on your Axon. It can comunicate wirelessly with a USB Bluetooth Dongle that would be connected directly in the PC's USB port or through that USB hub you mention. The webcam can be connected directly to the PC's USB port or through the USB hub. Both devices, I mean the webcam and the Bluetooth Dongle, have to be connected to the PC and not to the Axon, since they need a USB host to function (PC is a USB host, microcontrollers aren't). In other words, your Bluetooth thing is good to have wireless communication with your Axon. To also have wireless vision, you eighter need a wireless cam or a wireless USB hub.