pystiebeleltron
Python API for interacting with the Stiebel Eltron ISG web gateway via Modbus for controlling integral ventilation units and heat pumps.
Decision gist · record as of 2026-08-14
Yes, if you own a compatible STIEBEL ELTRON ISG WEB gateway with Modbus enabled and need Python-based control. The package is actively maintained, has no known vulnerabilities, uses a permissive MIT license, and requires Python 3.12 or later. The main constraint is hardware dependency—you must have the specific gateway and a compatible heat pump model.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires a STIEBEL ELTRON ISG WEB gateway with Modbus module enabled and network connectivity to it; Python 3.12 or later required.
- Low friction installation with a pure-Python wheel.
- Actively maintained with release on 2026-08-12.
License · maintenance · safety
MIT (permissive) — MIT license permits unrestricted use, modification, and distribution with minimal restrictions—suitable for both personal and commercial projects.
last release 2026-08-12 (2 days) · last repo commit 2026-08-12 · 7 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 75,731 downloads/mo, #14,683 on PyPI
Alternatives
Verify before relying
pip install pystiebeleltron
import asyncio
from modbus_connection import ModbusTcpParams
from modbus_connection.pymodbus import ModbusConnection
from pystiebeleltron.wpm import WpmStiebelEltronAPI
async def main():
connection = ModbusConnection(ModbusTcpParams(host='ISG_ADDRESS', port=502))
api = WpmStiebelEltronAPI(connection.for_unit(1))
await api.async_update()
print(api.system_values.outside_temperature)
await connection.close()
asyncio.run(main())- Compatibility with specific heat pump models beyond LWZ504e and LWZ304 mentioned in the description.
- Whether the package handles automatic reconnection if the Modbus link drops during operation.
- Full list of supported STIEBEL ELTRON device models and controller variants.
What it is and what it does
pystiebeleltron is a Python client library for the STIEBEL ELTRON ISG WEB gateway, an internet-connected controller for heat pumps and ventilation systems. It wraps the Modbus protocol to expose the gateway's registers as typed Python attributes, allowing you to read sensor values (outside temperature, comfort settings) and write control parameters (target temperatures) asynchronously. The library is based on the official Modbus user manual but is not endorsed by Stiebel Eltron.
You own the Modbus connection: you create it using modbus-connection and pymodbus, hand a unit to the API, and close it when done. The first read establishes the link; if it drops, the next request re-establishes it automatically. Each register block maps to a component on the API (system_values, system_parameters, etc.), and values are typed attributes that return None when unavailable.
Use it for
- Read real-time sensor data (outside temperature, system status) from a heat pump for monitoring dashboards.
- Adjust comfort temperature setpoints or other control parameters remotely via Python scripts.
- Integrate STIEBEL ELTRON heat pumps into home automation or IoT platforms that use Python.
- Build custom automation logic that responds to heat pump state changes.
- Monitor and log heat pump performance metrics over time for analysis.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you own a compatible STIEBEL ELTRON ISG WEB gateway with Modbus enabled and need Python-based control.
The package is actively maintained, has no known vulnerabilities, uses a permissive MIT license, and requires Python 3.12 or later. The main constraint is hardware dependency—you must have the specific gateway and a compatible heat pump model.
Install
pystiebeleltron on PyPI
Before you install
Low friction installation with a pure-Python wheel. Actively maintained with release on 2026-08-12. Requires Python 3.12 or later and two runtime dependencies (modbus-connection and pymodbus).
Requires a STIEBEL ELTRON ISG WEB gateway with Modbus module enabled and network connectivity to it; Python 3.12 or later required.
License in practice
MIT license permits unrestricted use, modification, and distribution with minimal restrictions—suitable for both personal and commercial projects.
Quickstart
pip install pystiebeleltron
import asyncio
from modbus_connection import ModbusTcpParams
from modbus_connection.pymodbus import ModbusConnection
from pystiebeleltron.wpm import WpmStiebelEltronAPI
async def main():
connection = ModbusConnection(ModbusTcpParams(host='ISG_ADDRESS', port=502))
api = WpmStiebelEltronAPI(connection.for_unit(1))
await api.async_update()
print(api.system_values.outside_temperature)
await connection.close()
asyncio.run(main())Verify before relying
- Compatibility with specific heat pump models beyond LWZ504e and LWZ304 mentioned in the description.
- Whether the package handles automatic reconnection if the Modbus link drops during operation.
- Full list of supported STIEBEL ELTRON device models and controller variants.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release <4,>=3.12 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagesmodbus-connectionpymodbus |
| Maintenance | Actively maintained 2 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 75,731 / month, #14,683 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Typing :: Typed |
Evidence: pystiebeleltron-0.7.0-py3-none-any.whl
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