Which of the following control methods is a wireless one-way interface designed to control a single device?

The wireless control method designed specifically for a one-way interface to control a single device is infrared. Infrared technology operates by emitting a beam of infrared light from a remote control that is received by the device. This communication occurs in one direction, meaning the remote sends commands to the device, but the device does not send any feedback or data back to the remote.

Infrared is commonly used in applications like remote controls for TVs, DVD players, and other consumer electronics. The simplicity and effectiveness of infrared for controlling a single device, without the need for complex bidirectional communication, make it a suitable choice for this purpose. Other methods mentioned, such as Bluetooth and Zigbee, typically support more complex, two-way communication which allows for greater interaction between devices.