waterfurnace

Python interface for WaterFurnace and GeoStar geothermal systems.

This provides basic sensor readings for WaterFurnace geothermal systems by using the websocket interface that exists for the Symphony website. This is not a documented or stable interface, so don't use this for critical systems. However, it is useful to record historical usage of your WaterFurnace system.

Installation

pip install waterfurnace

Quick Start

   from waterfurnace.waterfurnace import WaterFurnace
   wf = WaterFurnace(user, pass)
   wf.login()
   data = wf.read()

The waterfurnace symphony service websocket monitors it's usage, so you need to do a data reading at least every 30 seconds otherwise the websocket is closed on the server side for resource constraints. The symphony website does a poll on the websocket every 5 seconds.

The software now supports a CLI. For details, use waterfurnace --help

CLI Usage

The CLI uses subcommands. Common options (-u, -p, -v, etc.) go after the subcommand.

Reading sensor data

# One-shot sensor reading (password prompted if not provided)
waterfurnace sensors -u user@example.com -p password

# Read specific sensors
waterfurnace sensors -u user@example.com -p password -s enteringwatertemp,leavingairtemp

# Read all available sensors
waterfurnace sensors -u user@example.com -p password -s all

# Continuous monitoring (reads every 15 seconds)
waterfurnace sensors -u user@example.com -p password --continuous

# All parsed fields as JSON (status lines go to stderr, so this pipes cleanly)
waterfurnace sensors -u user@example.com -p password --format json | jq .

# The unmodified response from the unit, for fields the library doesn't map
waterfurnace sensors -u user@example.com -p password --format raw

Energy data

# Get hourly energy data for a date range
waterfurnace energy -u user@example.com -p password \
  --start 2024-01-01 --end 2024-01-31

# Daily energy data in a specific timezone
waterfurnace energy -u user@example.com -p password \
  --start 2024-01-01 --end 2024-01-31 --freq 1D --timezone America/Chicago

# 15-minute resolution energy data
waterfurnace energy -u user@example.com -p password \
  --start 2024-01-01 --end 2024-01-07 --freq 15min

Controlling the thermostat

# Set thermostat mode (off, auto, cool, heat, eheat)
waterfurnace set-mode -u user@example.com -p password auto

# Set cooling setpoint (60-90F)
waterfurnace set-cooling-temp -u user@example.com -p password 74

# Set heating setpoint (40-80F)
waterfurnace set-heating-temp -u user@example.com -p password 68

Multi-device and vendor options

# GeoStar systems (--vendor accepts "waterfurnace" or "geostar")
waterfurnace sensors -u user@example.com -p password --vendor geostar

# Select a specific device in a multi-device system (0-indexed)
waterfurnace sensors -u user@example.com -p password -D 1

# Select a specific location in a multi-location system (0-indexed)
waterfurnace sensors -u user@example.com -p password -l 1

Environment variables

# Set credentials via environment variables to avoid repeating them
export WF_USERNAME=user@example.com
export WF_PASSWORD=your_password

waterfurnace sensors
waterfurnace set-mode auto

# Reuse an existing session ID
export WF_SESSIONID=your_session_id

Development

Setting Up Development Environment

# Clone the repository
git clone https://github.com/sdague/waterfurnace.git
cd waterfurnace

# Install all dependencies (creates .venv automatically)
uv sync --extra dev

# Run tests
uv run pytest

# Run tests with coverage
uv run pytest --cov=waterfurnace --cov-report=term-missing

# Format and lint code
uv run ruff format waterfurnace tests
uv run ruff check waterfurnace tests

Building and Publishing

# Build package
uv build

Known Issues / Limitations

• The python websocket code goes into a blocked state after long periods of usage (always takes at least days if not weeks or months to get to this state). I've yet to discover why. Help welcome.

License

• Free software: Apache Software License 2.0