Guide: Alexa Octoprint Integration & Coaster

This write up is meant to serve as a guide for adding smart home controller support to a Raspberry Pi and integrating that support with Octoprint. This example details controlling the power for an Ender 3 but should be easily adaptable for other items like lights and fans.

What's with the Coaster?
A: It seemed morally wrong to click "Publish a Thing" but not have a thing.

Disclaimer
Please note this project will involve some basic electrical work and even though most of that should be low voltage DC you still need to be careful. If you are not comfortable with basic skills like soldering or reading a volt meter it might be a good time to stop.
Deliverables

When complete you will be able to turn your printer or lights on and off via both your smart home controller and the main Octoprint interface. Notifications will also 'push' to your smart home app.

TL,DR;







You'll be able to say Alexa, turn on my printer / Alexa turn off my printer lights / etc.

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