This is something that [Albert David has addressed] with his simple ESP8266-based WiFi switcher that he’s added to a string of USB-powered LEDs, and he’s neatly mounted the ESP-12 module it ...

To convert a light switch, use the control module that has a box flange and then any number of custom switch and display shields can be hot swapped on it.

For more information on the new Amazon Echo Feather HUZZAH with ESP8266 WiFi control system jump over to the Adafruit website for details by following the link below.