Common Home Automation Devices and How They Work

Smart light bulbs and switches let you control lighting through an app, a voice assistant, or a schedule, making them useful when you want lights on before you enter a room. Smart plugs add similar control to compatible lamps and other simple plug-in devices, although you should avoid using them with appliances that need continuous power or could be hazardous if switched on unexpectedly.

Smart thermostats can adjust heating and cooling on a schedule or through an app, which can be convenient when your routine changes or you want to adjust the temperature without walking to the thermostat. Smart speakers and displays can provide a voice-controlled way to set reminders, play music, or operate compatible devices, but they generally need an internet connection for many features.

Check the product’s listed specifications when evaluating comfort and everyday convenience.

Video doorbells, smart locks, and security cameras can help you manage access to your home or see who is at the door, with features varying by device and service. Smart smoke alarms, water-leak sensors, and motion sensors can provide alerts about conditions in the home; place and maintain safety devices according to their instructions, and do not rely on an app alert as your only safety plan.

Check the product’s listed specifications when evaluating security and safety devices.

You can start with one task, such as turning on a bedside lamp, then choose a device with controls that feel comfortable and check whether it works with any phone, voice assistant, or hub you plan to use. Our team suggests considering who will have access, how a device behaves during an internet or power outage, and whether it needs batteries, updates, or a subscription; for a practical starting point, see our smart home setup guide for seniors and our Smart Home Automation for Seniors Checklist digital download.