SONOFF WIFI SMART SWITCH
Sonoff is an affordable ESP8266 based device that provides users with smart home control.
It is a WiFi based wireless switch that can connect to a wide range of appliances.
Sonoff transmits data to a cloud platform through the WiFi router, which enables users to remotely control all the connected appliances,
via the mobile application eWeLink.
The Sonoff cloud server is an Amazon AWS global server.
Voltage range: 90-250v AC(50/60Hz)
Max current: 10A
Max Wattage: 2200 watts (Resistive Load)
StandBy power <0.5w
Operating Temperature: 0ºC-40ºC(32°F-104°F)
Operating Humidity: 5%-90%RH, Non-condensing
Wireless Frequency: 2.4Ghz
wireless standard 802.11 b/g/n
Sonoff makes all home appliances smart. As long as your mobile has network, you can remotely control the connected appliances from anywhere at any time.
Another feature available is to set timing schedules for appliances, which includes countdown timers and scheduled on/off times.
This can make controlling lights/heating etc easier and avoid spending excess money on electricity bills if you forgot to switch of the light before you left for work for example.
This ESP8266 based device can further be modified with available Firmwares
With a very tiny amount of soldering and some custom firmware, the Sonoff Basic model can be turned into a locally controlled MQTT enabled WiFi smart switch
There are a lot of options for flashing the Sonoff. You can use the simple KmanSonoff. If you would like something more full featured, check out Sonoff-Tasmota.
KmanSonoff is very lightweight and foolproof.