From remote switches to networked homes
The idea of a home that responds to commands is older than the internet. In 1975, a Scottish company introduced X10, a system that sent control signals over a house’s existing electrical wiring so that lamps and appliances could be switched from a central controller or a timer. It was inexpensive and remained popular with hobbyists for decades, though its signals were prone to interference. Other early systems used dedicated wiring, and some were installed in expensive custom homes in the 1980s and 1990s.
The change that brought smart homes to ordinary households was the arrival of home Wi-Fi in the early 2000s, followed by smartphones that could serve as remote controls. Companies could now sell a device that connected to a router the family already owned and was controlled through an app, rather than requiring a specialist installer. Programmable thermostats, which had existed since the late twentieth century, became learning or app-controlled devices around 2011, and cameras, door locks, light bulbs, plugs and appliances followed.
Voice assistants and hubs
In the mid-2010s, small speakers with built-in microphones introduced voice assistants to many living rooms. The speaker was both an entertainment device and a hub for other products, letting users give spoken commands for lights or music. Large technology companies competed to be the center of the home, and each had its own set of compatible products. This meant that a device sold for one ecosystem might not work with another. Industry groups then developed shared standards, and one called Matter was introduced in 2022 to make products work across brands, though its adoption has been gradual.
Cities and utilities
Connected devices also spread outside the home. Electric, gas and water utilities began installing smart meters that report use remotely, which reduces the need for manual reading and allows more detailed billing. Cities experimented with sensors on streetlights, parking spaces, traffic signals, bins and air-quality monitors, some of them networked wirelessly. Farms used soil and livestock sensors, and factories attached monitors to machines to spot failures early. The Internet of Things in industry is often shortened to IIoT.
These projects had mixed results. Some saved money or time, while others proved costly to maintain, and cities found that gathering data was easier than deciding what to do with it. Where large amounts of readings are stored and studied, techniques related to big data and cloud computing are usually involved.
Security problems
Many connected devices were designed to be cheap and quick to bring to market, and security was sometimes treated as an afterthought. Common weaknesses included default passwords that users never changed, services left open to the internet, and no practical way to install updates. Because a device might sit in a home for many years, a flaw discovered later could remain unfixed.
In October 2016, a program called Mirai took over large numbers of insecure cameras and home routers by trying a list of default passwords, then used them to flood a domain-name service provider with traffic. The attack disrupted access to a number of popular websites for hours. It drew wide attention to the risk that poorly protected small devices could be turned into tools for attack at scale. This was an example of a wider problem that falls under cybersecurity, in which each unprotected gadget adds a possible entry point to a home network, and network firewalls in routers offer only partial protection.
Governments and standards groups responded over the following years with guidance and, in some places, rules, for example calling for unique passwords and a stated period of security updates. The details vary by country, and the effect on the market is still being assessed.
Privacy
Devices that listen, watch or measure raise questions that go beyond hacking. A microphone in a speaker has to listen for a wake word, and critics have asked what is recorded, where it is stored and who can review it. Cameras and doorbells can capture images of neighbors and passers-by. Smart meters can reveal patterns about when a household is home. Manufacturers have said such data is used to provide services and to improve products, but policies differ, and users often find them long and hard to compare. There have been reports of recordings reviewed by company staff or provided to authorities in response to legal requests, and public understanding has developed slowly.
Practical lessons from the record
History does not offer a verdict on whether connected devices are good or bad. It shows a pattern: convenience spread faster than the habits and rules needed to keep devices secure. Readers who use such products may want to check a maker’s update policy and privacy settings, though that is a general suggestion rather than expert advice, and conditions vary between products.