Case in point: the $5 Sonoff WiFi Smart Switch has an ESP8266 ... emulated I2C turns this little “switch” into something much more useful — a wall-powered IoT sensor node in a sweet little ...

Internet of Everything is the way to go for home automation these days. ITEAD makes an ESP-8266 switch that IoT-ifies your appliances. If you still have an ancient, 433 MHz style radio switch ...