How I made all my smart home devices HomeKit compatible with a Raspberry Pi

Despite efforts to create universal standards for smart home devices, we still live in a world where a smart plug that works with Alexa and Google may not work with Apple’s Home platform. It can be incredibly frustrating to find a device that otherwise seems perfect for your needs but doesn’t work with your smart home ecosystem. It’s even worse if you decide to switch from one ecosystem to another, only to find that half of your devices are no longer compatible.