WiFi MQTT controlled relay for Home Assistant

I’ve been wanting to use a ESP8266 WiFi module in a project for some time now, and after reading about the WeMos board I figured this was the easiest way to get started. The WeMos D1 mini is quite small, and much easier to interact with and program than the ESP8266 devices. So I built this single relay controller, with internal temperature reporting. I am communicating with it using MQTT, which makes it really easy to implement it into things like Home Assistant.

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The Rack Box project

When I was young and single I had a lot of spare time. I lived in a tiny apartment and wanted to build electronic modules for home-automation and whatever really. I just wanted to solder and make circuit boards. So I got myself a server rack box, and started making electronics and microcontroller modules to fill it with.

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