myVAILLANT for Home Assistant (Marketplace integration)

Installs: 3.9k sharing analytics
GitHub stars: 349
Connection: Uses the vendor's cloud
Upkeep: Updated in the last 6 months
Version: v0.9.19, July 22, 2026
Category: Climate, Thermostats and heating
Kind: Marketplace integration
Brand: Vaillant
Needs: Needs the Marketplace (HACS on 2026.10 and older)
Domain: mypyllant
Source: github.com/signalkraft/mypyllant-component
Issues: Report an issue

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation.

Screenshots From the README of signalkraft/mypyllant-component.

About

myVAILLANT is an integration that controls Vaillant heating devices such as aroTHERM heat pumps and ecoTEC boilers through the myVAILLANT cloud API. It also works with branded versions of the API, such as the MiGo Link app from Saunier Duval and Bulex, selectable through a brand setting. It adds climate and water heater controls, along with sensors, switches, numbers, calendars, dates and times, and binary sensors. Operating modes, target temperature and presets such as holiday mode or quick veto can be controlled, and custom services set schedules for climate zones, water heaters and circulation pumps. Sensors cover temperature, humidity, energy usage and efficiency, plus diagnostics such as heating curve, flow temperature, firmware versions and water pressure. Options cover update intervals, default durations for quick veto and away mode, and whether temperature controls overwrite the time program; setup is done in the UI with the app account login.

Automatic summary of the README and code of signalkraft/mypyllant-component. Something wrong, or are you the maintainer and want your own text here? Get in touch

Supports

Uses the vendor's cloud Needs an internet connection and an account with the vendor.
From the Marketplace Installed through the Marketplace, formerly HACS.
Actively maintained Its author released or pushed a change in the last six months.

Provides

Climate
Water heaters
Switches
Sensors
Calendars

Setting it up

Install it from the Marketplace and restart Home Assistant, then add it under Settings, Devices and services.

Login Information

Password
Email Address
Country
Brand

Reauthenticate to myVAILLANT

Password
Username
Country
Brand

Also asked when changing the connection.

After setup

Seconds between live data updates (lowering risks 'quota exceeded' errors and temporary bans)
Seconds between energy data updates (lowering risks 'quota exceeded' errors and temporary bans)
Delay in seconds before refreshing data after updates
Default duration in hours for quick veto
Default duration in days for away mode
Temperature controls overwrite time program instead of setting quick veto
Default temperature setpoint for away mode
Default duration for manual cooling in days
Temperature above which legionella protection is considered active
Country
Brand
Fetch real-time statistics (not supported on every system)
Fetch real-time power usage (not supported on every system)
Fetch system connection status
Fetch diagnostic trouble codes

Texts from the code of signalkraft/mypyllant-component.

From the README

Home Assistant component that interfaces with the myVAILLANT API (and branded versions of it, such as the MiGo Link app from Saunier Duval & Bulex).
Supports climate & hot water controls, as well as sensor information
Control operating modes, target temperature, and presets such as holiday more or quick veto
Set the schedule for climate zones, water heaters, and circulation pumps with a custom service
Track sensor information of devices, such as temperature, humidity, operating mode, energy usage, or energy efficiency
See diagnostic information, such as the current heating curve, flow temperature, firmware versions, or water pressure
Custom services to set holiday mode or quick veto temperature overrides, and their duration

From the README of signalkraft/mypyllant-component, MIT License. Shortened.