Up to this point, I did already lay out all of the tidbits concerning the electricity, the I/O hardware units, even some custom software to provide an event-based API to address all of the various components in the overall system. The final fundamental piece to bring everything together is what I call the service layer, and specifically home assistant.

This post is a part of a larger series of posts on my home automation setup. See the home automation overview post, to learn about the rationale and a description of the other posts!