Cassa HA: Bootstrap Home Assistant onto a Homey Pro

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[AI-generated for clarity]

Hey all,

I love the Homey Pro – the hardware is rock solid, the radios are all in one place, and the software is refreshingly easy to use. But as much as I enjoy the Homey ecosystem, I’ve always longed for the larger community, add-ons, and flexibility of Home Assistant. I’ve run HA before on dedicated hardware, and I kept wishing there was a way to bring the two worlds together.

That’s what led me to build Cassa HA - Core Automation & Smart System Assistant

The core idea

  • A Homey Pro backup (.homeyprobackup) is just a raw .img file with some header data.
  • My tool modifies that backup image in place — no OS redistribution, nothing proprietary bundled.
  • The result: a Homey Pro that boots directly into Home Assistant.
  • All Homey services are disabled so only Home Assistant runs on the device.

In other words, you can turn your Homey Pro into a dedicated Home Assistant box using just your own backup file.

Why this is exciting

  • Homey Pro hardware + HA’s massive community = best of both worlds.
  • No second device needed — everything runs on the Homey Pro itself.
  • No redistribution of proprietary files; the magic happens on your backup.
  • You can always restore a stock backup to roll back.

Coprocessor bridge add-on (WIP)

I’m also working on a Homey Coprocessor bridge add-on for HA:

  • Currently focused on Z-Wave and LED integration.
  • Zigbee is already directly exposed to the OS, so no bridge needed there.
  • Still very WIP — I only have one device to test with, and it’s hacky.
  • To respect Athom’s IP, I’m not distributing binaries — just glue code built from what I learned by reverse engineering.

How it works

  1. Back up your Homey Pro (you get a .homeyprobackup file).
  2. Run my tool — it unpacks the header, modifies the raw .img, and bootstraps Home Assistant.
  3. Restore that backup to your device.
  4. Boot into a dedicated Home Assistant system on Homey Pro hardware.

Repo

GitHub: MrDaGree/cassa-ha

Docs, usage, and a breakdown of how the bootstrap works are in the README. I’d appreciate any support/broken reporting utilize Github Issues.

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Hi,

This is really cool! I hope it works out well because having a clean box running Home Assistant OS with all the radios (Zigbee, Z-Wave) working perfectly would be the ideal setup.

The Homey Pro hardware is great, so being able to leverage it with HA’s flexibility and ecosystem would be fantastic. Looking forward to seeing how the coprocessor bridge develops, especially for Z-Wave integration.

Great work on this project!