CIFF Shanghai has learned that today's smart homes have moved beyond the initial stage of single-device mobile phone remote control. Relying on the coordinated linkage of home networks, control hubs, various sensors, and execution devices, they achieve autonomous perception, intelligent judgment, and automatic response of the residential environment, forming a complete whole-home smart operating system. A standardized smart home system mainly consists of an ecosystem home network, control hub and gateway, sensing devices, smart switches, smart lighting, and various execution terminals. Each module performs its own duties and interconnects, jointly building stable and practical smart home scenarios.
Currently, China's domestic smart home ecosystem is dominated by three major systems: Apple, Huawei, and Xiaomi, each with its own applicable scenarios and technical features, adapting to different user needs and renovation modes. Apple's HomeKit ecosystem relies on terminal devices such as iPhone, iPad, and Apple Watch for unified control, using HomePod and Apple TV as home hubs, supporting Matter and Thread network protocols. The overall operation is simple, privacy is strong, and device linkage is smooth, highly suited to Apple device users. Its shortcoming is the limited range of compatible device categories, with some peripherals requiring third-party gateways for access. Huawei's HarmonyOS Smart Home focuses on whole-home integrated customization solutions, relying on smart hosts, central control screens, and smart panels to build the entire system. It can integrate all categories of devices including networking, lighting, security, shading, audio-visual, and home appliances, autonomously completing learning, computation, and intelligent decision-making. With rich scenario modes and standardized construction and after-sales systems, it is more suitable for unified planning and implementation in the early stages of renovation, with relatively higher overall delivery costs. Xiaomi's Mijia ecosystem is widely popular due to its rich device categories, outstanding cost-effectiveness, and strong scalability. Its multi-mode gateway is compatible with mainstream protocols such as Bluetooth, Bluetooth Mesh, and Zigbee, with flexible device access, support for gradual iterative upgrades, and high flexibility in automation settings, adapting to the whole-home smart renovation needs of ordinary households for self-built, budget-controlled systems.
The stability of the home network is the foundation for long-term smart home operation. Current mainstream networking solutions are divided into two modes: AC+AP and Mesh networking, adapting to different apartment types and renovation scenarios. The AC+AP solution consists of a controller and multiple wireless access points, which can uniformly manage whole-home network signals, channels, and power, with even multi-area signal coverage and support for fast device roaming. It is suitable for large spaces such as large apartments, duplexes, and multi-story residences, mostly deployed via wired connections with extremely strong operational stability. Mesh networking consists of multiple routing nodes forming a unified wireless network, supporting both wireless and wired backhaul modes, with wired backhaul offering better stability. Overall deployment is simple without complex cabling, suitable for ordinary residences that have already been renovated and where re-cabling is inconvenient. The industry generally recommends that for new home cabling and large apartment spaces, the AC+AP solution should be prioritized; for stock renovations and small apartment residences, Mesh networking can be used. At the same time, it is necessary to distinguish the different functions of network routing devices and smart home gateways, ensuring stable operation of both network transmission and device intelligent control.
Smart home gateways, represented by Xiaomi's Mijia system, can be divided into three levels: main gateway, slave gateway, and blind gateway, with clear division of labor that directly determines the linkage capability and offline stability of the whole-home smart system. The main gateway, as the core hub of whole-home intelligence, is responsible for storing local automation rules, receiving sensor signals, executing intelligent judgments, and issuing device commands. It also coordinates and manages all slave gateways and attached devices throughout the home, supporting offline automation operation within the local area network, and is the core carrier of the entire system. Slave gateways are mainly used to expand the signal coverage of Bluetooth, Mesh, and Zigbee devices, handling signal transmission from devices in remote rooms, following unified scheduling from the main gateway, and solving the problem of signal blind spots in large apartments. They can be deployed independently or integrated into devices such as routers, smart screens, and smart panels. Blind gateways only have basic device networking and signal forwarding capabilities, cannot fully access local hub scheduling, and devices connected through them mostly rely on cloud operation. After network disconnection, automation linkage will most likely fail, with relatively weak overall stability.
Smart home automation is divided into two modes: local execution and cloud execution, with significant differences in performance and applicable scenarios that directly affect home smart experience and reliability. Local automation runs on the home local area network without relying on cloud servers, offering fast response and normal operation during network outages. It is the core guarantee for basic home linkages such as lighting and security, and complete local linkage requires full-chain support from sensors, gateways, and execution terminals. Cloud automation relies on external networks and servers to complete data judgment and command issuance, enabling diverse functions such as mobile phone positioning, weather linkage, remote control, message push, and AI smart services, with stronger scenario scalability. However, it fails when the external network is interrupted or the cloud is abnormal. In actual implementation, the industry generally follows the design principle of localizing basic functions and cloudifying extended functions, ensuring that core functions such as basic lighting and manual control operate normally after network disconnection, avoiding the problem of whole-home smart paralysis.
Sensors, as the perception core of smart homes, are equivalent to the "sensory nerves" of the whole-home system. Mainstream technologies include three types: passive infrared, near-infrared, and millimeter-wave radar, each adapting to different home scenarios. Passive infrared sensors, commonly known as PIR human sensors, judge human movement by sensing changes in human thermal radiation, offering the advantages of low power consumption, low cost, and long battery life. They are suitable for areas with frequent human movement such as entryways, hallways, and stairs. Their shortcoming is the inability to recognize stationary humans, and they are susceptible to interference from environmental heat sources and lighting. Near-infrared technology relies on active light-emitting ranging and imaging perception, covering functions such as ToF ranging, structured light, and night vision cameras. It is mostly used in scenarios such as face recognition, device obstacle avoidance, and night vision fill light. It does not rely on human heat sources, but has higher power consumption and is susceptible to strong light interference. Millimeter-wave radar is the current mainstream solution for high-precision perception, capable of accurately recognizing static human sitting and subtle breathing movements, supporting distance measurement, area division, and multi-person tracking. It is not affected by lighting or heat sources, perfectly adapting to spaces where people remain stationary for long periods such as bedrooms, studies, and bathrooms. Some high-end radar devices can also achieve zoned refined scenario linkage, with the only shortcoming being relatively higher cost and power consumption. In actual deployment, high-frequency movement areas can use cost-effective PIR sensors, static sedentary spaces should prioritize millimeter-wave radar deployment, and precise recognition scenarios should use near-infrared technology, achieving a balance between performance and cost.
In addition to human perception devices, conventional sensors such as door/window, light, temperature/humidity, water leak, smoke, and gas sensors jointly build a whole-home environmental monitoring and safety protection system. Door/window sensors can be linked to enable scenarios such as turning on lights when doors open, turning off air conditioners when windows open, and door/window reminders when leaving home; light sensors combine with human status to intelligently start and stop lighting, avoiding ineffective lighting; temperature/humidity sensors can be linked with air conditioners, fresh air systems, and humidification/dehumidification devices to maintain a comfortable indoor environment; water leak, smoke, and gas sensors focus on home safety, with key deployment in kitchens, bathrooms, and home appliance areas, prioritizing models with local audible and visual alarms to comprehensively build a home safety defense line.
Smart lighting control is mainly divided into two major solutions: smart switches and smart lamps, adapting to different renovation needs and usage habits. Smart switches can directly adapt to traditional ordinary lamps, retaining manual button operation, and can still be used normally during network abnormalities, adapting to whole-home basic lighting renovation. During renovation, it is necessary to confirm in advance the reservation of the neutral wire in the bottom box to ensure stable device operation. Smart lamps come with built-in communication and dimming drivers, capable of precisely adjusting brightness, color temperature, and color, with stronger plasticity for lighting atmosphere. However, they require continuous power supply and are more suitable for use with wireless switches, momentary switches, and smart panels. The industry's selection logic is clear: basic on/off control should prioritize smart switches, while atmosphere dimming and color temperature adjustment needs should be paired with smart lamps and driver systems.
Mature smart lighting design centers on the refined coordination of color temperature, brightness, and spatial layering, rather than simple on/off control. Warm light of 2700K to 3000K suits bedrooms, dining rooms, and nighttime living rooms, creating a relaxed and warm atmosphere; neutral light of 3500K to 4000K is natural and transparent, suitable for core activity spaces such as daily living rooms, kitchens, bathrooms, and studies; cold white light above 5000K provides sufficient brightness, mostly used for local work and cleaning scenarios. At the same time, lighting brightness can be automatically adjusted according to day/night, scenarios, and human status, paired with a multi-layer lighting system of basic lighting, accent lighting, and atmosphere lighting, achieving automatic lighting adaptation for different scenarios such as daily living, movie watching, guest reception, and nighttime bathroom visits, greatly enhancing home quality and comfort.
Overall, high-quality smart home design is not about blindly stacking devices, but about centering on stability, practicality, and ease of maintenance. Relying on a sound system architecture, reasonable device selection, and scientific scenario logic, it enables home spaces to achieve autonomous perception and proactive service. CIFF Shanghai believes that by ensuring stability through localized basic linkage, expanding scenario experience through cloud functions, and pairing with apartment-appropriate network solutions and precise sensing devices, a truly human-living symbiotic smart home experience can be achieved, which is also the core design criterion for current whole-home smart implementation.
Source: https://mp.weixin.qq.com/s/9KjlKOaHsffjAK9e4GtkHA?from=industrynews&color_scheme=light
