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Only a few years ago ‘smart’ devices in home seemed to be available only for a small group of people. Recently we heard a lot about Amazon Echo or Google Home, which attempt to bring personal assistant to the everyday life of each of us. Most of the commercial solutions are still quite expensive, but standalone modules that you can program yourself, which are much cheaper, are gaining popularity. In this article, I will show you how to build a simple light module controlled from an Android app via Wi-Fi.