Hey @aquavass - If you’re running hass.io on a RPi, which is essentially a custom OS that runs docker to present Home Asssistant and plugins, you should be right to following this guide using the Portainer plugin: Tutorial: add Homebridge to Hass.io using Portainer
Once you have the HomeBridge container up and running, you can open its portal and install the RinnaiTouch plugin, and hopefully it will automatically find your module and automatically create all the thermostat accessories. After that, some of your options of controlling it are:
- Home Assistant HomeKit Controller integration (will create new entities)
- MQTT
- Node-Red HomeBridge plugin
Hope that helps.