A Homebridge plugin for
Infinitive, a system that connects to a
Carrier Infinity HVAC serial control bus via an RS-485 dongle and allows for
networked control over the thermostat and HVAC units. homebridge-infinitive
exposes the following features to
Apple HomeKit:
- Read and set your thermostat's current temperature and heating/cooling mode.
- See whether your thermostat is actively heating or cooling.
- Set and store separate target temperatures for heating and cooling.
- Full support for auto mode and temperature setpoints.
- Multiple independent thermostats.
- Can optionally expose sensors representing outdoor temperature and humidity, measured at your HVAC cabinet.
- Voice control and automation via standard HomeKit features.
These features aren't implemented just yet:
- Non-HomeKit updates made to your HVAC system (through the thermostat or Infinitive API, for example) will not immediately push an update to HomeKit.
The following features are not supported:
- Thermostat-level scheduling or vacation mode. These are best done via HomeKit.
- Multi-zone Infinity control (requires Infinitive support).
- In-depth heat pump or electric heating control.
First, get Infinitive working; its repo has fairly complete steps. My own recommendations are to host Infinitive on a small embedded system like a Raspberry Pi or any of the Pine64 SBCs, keep it indoors by connecting your RS-485 adapter to your thermostat's A and B lines with short bits of wire (you'll likely have to drill a couple of holes in your thermostat mount), and host Infinitive behind a strong reverse proxy like Nginx with HTTP basic auth enabled. See my own configuration at home for an example of a ruggedized Infinitive installation.
This section assumes you have a Homebridge installation and have installed this plugin. If not, Homebridge's documentation around this is fairly complete.
The recommended way to configure this plugin is via homebridge-config-ui-x.
To manually configure the plugin, insert a section into your config with the following fields:
| Field | Value |
|---|---|
platform |
Must be infinitive |
name |
A friendly name for the thermostat |
url |
The base URL for the Infinitive server (IE, http://infinitive) |
username |
The HTTP basic auth username for the server (optional) |
password |
The HTTP basic auth password for the server (optional) |
includeOutdoorSensors |
Whether to include HomeKit sensors for outdoor temperature and humidity |