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I am working on a very similar project myself. I want the outlets to be controlled with a DHT22 temperature and humidity sensor. I put a decent amount of effort into designing a PCB for it, though in the end I have decided to use Particle's relay shield so that I don't have to reinvent the wheel and then I can focus on the external wiring and building a safe enclosure. Check it out on my Hack-A-Day, I hopefully will have a functional prototype over my Winter Break. https://hackaday.io/project/6229-photonhome-ac-power-iot-homebase