A controller is communicatively coupled to the one or more user input devices, such as sensors or electrodes, a user interface device, and one or more switch-controlled devices. The controller presents a configuration user interface on the user interface device including selectable configurations for access modes. The controller assigns one or more of the user input devices according to a current selected configuration of an access mode. The controller detects a volitional user input corresponding to a change in a particular signal detected by a particular user input device. The controller identifies the user input based on the current selected configuration and the detected volitional user input and switches the switch-controlled device based on the detected user input. In one or more embodiments, the system includes one or more sensors for detection of movement, gestures, eye tracking or other input.