Modules are purchased which plug into power outlets and then the appliances to be controlled. Such a system can be expanded over time, as your budget allows. For instance, when I enter the bathroom, the lights fade in by themselves and fade out after a predetermined number of minutes. You can control everything either by phone, with a remote, or by a touch-screen panel. A loss of mobility implies increased risk in the event of an emergency.
Early warning is critical for a person with a disability.
Warning alarms include smoke, fire, and gas detectors. The alarm design should consider a variety of sensory needs. A buzzer or siren for warning might not be sufficient. Products are available with strobe lights which can waken sighted people from a deep sleep and thus also serve people with hearing disabilities. Check alarm batteries often.