FANlun's Wi-Fi smart switch solution for single-live wiring is built on the ESP32-C family and solves multiple single-live deployment challenges through coordinated hardware and software optimization. Dynamic power management adjusts CPU frequency and RF output based on application demand, keeping operating current at around 600 to 800 ?A while maintaining stable Wi-Fi connectivity and completely eliminating LED flicker issues. The ESP32-C platform's strong RF performance, including RX sensitivity down to -98.4 dBm and TX power up to 21 dBm, ensures stable connectivity in complex home environments and can maintain about 20 meters of effective communication after passing through three walls. On the security side, the solution integrates RSA-3072 secure boot and AES-128-XTS flash encryption to prevent unauthorized firmware execution and data leakage. It also supports Matter for cross-ecosystem interoperability and works with ESP RainMaker and major public clouds for remote control, OTA updates, and device sharing. A modular hardware design fits the standard 86-type wall switch form factor, allowing ordinary users to complete replacement in about ten minutes. The complete stack includes chips, modules, and reference designs, greatly reducing development difficulty and cost.