I. Core technologies of wireless smart home

1. Mainstream wireless protocols

2. Technology comparison

Wi-Fi: Suitable for high-bandwidth devices (such as cameras), but too many devices will cause network congestion.
Zigbee: Low power consumption, self-organizing network, suitable for sensors and lamps, requires a coordinator (such as CC2531).
Z-Wave: High stability, but requires a dedicated gateway and is more expensive.
Matter: Unified protocol, cross-brand linkage in the future (such as iPhone controlling Zigbee devices)

Ⅱ. Classification of wireless smart home devices

1. Lighting control

Smart bulbs:

Philips Hue (supports Zigbee, adjustable color temperature and brightness).

Yeelight (Wi-Fi direct connection, supports Xiao Ai).

Smart switch:

Aqara smart switch (Zigbee, supports localized control).

Lutron Caséta (Zigbee + Wi-Fi, high-end dimming).

2. Environmental monitoring

Sensors:

Aqara temperature and humidity sensor (Zigbee, linked to air conditioner/humidifier).

Xiaomi human body sensor (Bluetooth/Zigbee, automatic light on).

Air quality monitoring:

Dyson Purifier Humidify+Cool (Wi-Fi, linked to fresh air system).

3. Security system

Smart door lock:

August Smart Lock (Wi-Fi, remote authorization temporary password).
Aqara smart door lock (Zigbee, supports fingerprint/password).
Security camera:

Eufy Indoor Cam (Wi-Fi, local storage, no cloud service).

Arlo Pro (Wi-Fi, 3K HD, supports night vision).

4. Home appliance control

Smart socket:

TP-Link Kasa HS103 (Wi-Fi, supports timer switch).

Sonoff Mini (Wi-Fi/Zigbee, open source compatible).

Smart curtain:

Aqara smart curtain motor (Zigbee, voice control).

Lutron Serena (Zigbee, gradient dimming).

5. Voice and entertainment

Smart speaker:

Amazon Echo (fourth generation) (Wi-Fi/Alexa, supports Zigbee relay).

HomePod mini (Wi-Fi/Siri, Apple ecosystem linkage).
Smart TV:
Sony Bravia (Wi-Fi, supports AirPlay 2).

Ⅲ. Typical application scenarios

1. Home automation

Linkage solution:
Mobile phone is close (Bluetooth/Wi-Fi) → automatically turn on the light → turn on the air conditioner → open the curtains.

Device: Aqara human body sensor + smart switch + curtain motor.

2. Security monitoring

Scenario example:
Door and window sensor triggers → camera records and pushes notification to mobile phone → sound and light alarm starts.

Device: Aqara door and window sensor + Eufy camera + Aqara alarm.

3. Energy management

Linkage solution:
Temperature and humidity sensor detects the environment → automatically adjusts the air conditioner/humidifier → energy-saving mode automatically turns off non-essential appliances.

Device: Xiaomi temperature and humidity sensor + Tuya smart socket.

4. Elderly/child care

Device combination:
Fall detection sensor (such as Aeotec Care) → push alarm to family members' mobile phones.

Smart camera + voice speaker → Check the status in real time and make voice calls.