WIFI Switch to integrate in wall | pimatic home automation forum
Retrofit House Lights with WiFi - Keep existing switches Controlled by Android using ESP8266 and pfodApp<br><b><i>No Android programming required</i></b>
ESP8266 ESP-01S 5V WiFi Relay Module Things Smart Home Remote Control Switch Replacement for Arduino Phone APP - Walmart.com
ESP8266 / Sonoff Controlled Ceiling Lights - Share your Projects! - Home Assistant Community
Esp8266 Chip Wall Light Switch Interruptor Inteligente Power Wall Switch Smart Tuya Switch - Buy Smart Power Tuya Switch,Esp8266 Wall Light Switch,Interruptor Inteligente Light Switch Product on Alibaba.com
ESP8266 – HomeKit Light Switch - StudioPieters®
An ESP8266 In Every Light Switch And Outlet | Hackaday
An ESP8266 In Every Light Switch And Outlet | Hackaday