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If you don't want to use ready-made components when networking everyday devices, you can rely on Arduino, ESP8266 or the Raspberry Pi. With lots of source code, the practical book "Manifest - The Handbook for the Digital World Revolution" shows you how to build an IoT smart home yourself, control it with your smartphone and usually have more options than with ready-made devices. This is because the latter often come with incompatibilities that you certainly don't need in your own smart home. The 800-page book contains more than 50 projects with step-by-step instructions and source codes to follow.