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README.md

overview

You’re looking at a minimal implementation of a central control unit for BidCoS-based home automation devices such as the eQ-3 “HomeMatic” line of products.

The program does not keep any state and does not read any configuration. Instead, the specific use-case the author needed and devices the author owns are hard-coded. In a way, you can think of it as a home automation “configured” in Go, coming with its own low-level libraries.

contributions

Note that this project does not accept new features, neither feature requests nor feature contributions. Documentation or code corrections on the other hand are very welcome.

The code is published in the hope that it will be useful to someone, perhaps understanding/implementing the BidCoS protocol themselves :).

If you’d like to see this become an active open source project, please fork and maintain it, and I’ll gladly add a reference to your version.

details

This code interacts with the following HomeMatic devices:

  • HM-MOD-RPI-PCB (wireless transceiver)
  • HM-CC-RT-DN (heating valve drivers)
  • HM-TC-IT-WM-W-EU (thermostats)
  • HM-ES-PMSw1-Pl (power switch)

All implemented properties of BidCoS events are exposed as prometheus metrics.

AES encryption is not supported, because I don’t see the need for my use-case.

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minimal HomeMatic CCU (central control unit) re-implementation in Go

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