Communication interface adapter capable of controlling power and signal of peripheral device, method for dynamically assigning identification codes of communication interface adapter, and method for automatically diagnosing peripheral device and recovering peripheral device found to be in abnormal operation being electrically connected between a computer device and a peripheral device for controlling signal transmission between the computer device and the peripheral device

Disclosed is to provide a communication interface adapter that can control power and signal of a peripheral device, which may be but not limited to a USB adapter, and is connected to a computer device to a peripheral device (such as a USB peripheral device, but not limited thereto), and includes a first communication interface (such as a USB adapter, but not limited thereto) to be electrically connected to the computer device, a second communication interface (such as a USB adapter, but not limited thereto) to be electrically connected to the peripheral device, a microcontroller, a communication interface hub electrically connected to the first communication interface and the microcontroller (such as a USB hub, but not limited thereto), and a switch unit that is electrically connected between the communication interface hub and the second communication interface, and is controlled by the microcontroller to operate, so as to control whether to output the signal, which is outputted from the communication interf