Flashing Tasmota Firmware on Wifi Smart Switches Sonoff Basic S20 SV
The Sonoff devices by https://www.itead.cc/ are an excellent little range of modules for building your own Smart Home setup. They are pretty well built, CE and RoHS marked and implement what is essentially a WiFi operated switch/relay circuit based on the extremely versatile ESP8266. See here for a full circuit schematic. It can handle up to 10A load so could be used for...