In this guide, you will learn how to control any 110-240V appliance for $5, using Itead's SONOFF device. Compared with the $30 Wi-Fi 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.
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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!