I have a digital camera with a USB port for image dowload from the camera SD card.
I will like to be able to capture this image files store in the camera SD card using the Arduino TX TR lines (serial) then transmit this image file to the computer from the USB connection from Arduino to Computer.
The reason need this scenario responds to that the camera dissables the shutter when sensing a USB cable conneted to computer. I do not knwo why this happens but I suspect is an underdeveloped feature of the camera.
Basically, I will like to use Arduino as a USB hub for external devices but at the same time to power down the line when no longer need the device using the Arduino TX and TX line . This will give tha camera a sense that the camera is been unplugged.