In this guide you will learn how to control any 110-240V appliance for $5, using Itead's SONOFF device. Compared to the $30 WiFi smart plugs out there, the SONOFF is a great alternative for making smart home and even industrial IoT projects at a larger scale. Moreover, it is based on the popular ESP8266 Wi-Fi chip, making it compatible with the Arduino environment and other resources like our ESP libraries at Ubidots.
The SONOFF comes with its own firmware and mobile app, but we think that its main value actually lies in its form-factor and low price. This is why we decided to do some hacking and unleash its full power!
The SONOFF contains a relay, an ESP8266 WiFi chip and the required circuitry to power it with the AC line of a power outlet. It also comes in a nice package that makes it look more professional than an average DIY project at home.