Kronoterm for Home Assistant (Marketplace integration)

Installs: 55 sharing analytics
GitHub stars: 19
Connection: Works locally
Upkeep: Updated in the last 6 months
Version: v1.7.3, October 26, 2026
Category: Climate
Kind: Marketplace integration
Needs: Needs the Marketplace (HACS on 2026.10 and older)
Domain: kronoterm
Source: github.com/Favio25/Kronoterm-homeassistant
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 Favio25/Kronoterm-homeassistant.

About

Kronoterm is an integration for monitoring and controlling Kronoterm heat pump systems from Home Assistant. It connects through the Kronoterm cloud with mobile app credentials, or locally over Modbus TCP through an RS485-to-Ethernet adapter, or over a direct Modbus RTU serial link. It adds climate controls for hot water, heating loops, reservoir and pool, plus sensors, binary sensors, switches, numbers, selects and a button to reimport energy statistics. The switches cover items such as heat pump on and off, holiday mode, and the reserve source. The controller type, TT3000 or TT4000, is detected automatically, and the update interval can be changed in the options. Energy data works with the Home Assistant energy dashboard, and a redacted diagnostics file can be downloaded for bug reports. Setup is done in the UI.

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Supports

Works locally Talks to your devices on your own network. No vendor cloud in between.
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
Switches
Sensors

Setting it up

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

Connection Type

Connection Type

Also asked when changing the connection.

Cloud API Configuration

Username
Password
Heat Pump TypeSelect Heat Pump Type

Also asked when changing the connection.

Modbus Transport

Transport

Modbus TCP Configuration

IP AddressIP address of your Kronoterm heat pump on local network
PortModbus TCP port (default: 502)
Modbus Unit IDModbus slave address (default: 20)
TimeoutConnection timeout in seconds

Modbus RTU Configuration

Serial Port
Baud Rate
Data Bits
Parity
Stop Bits
Timeout
Modbus Unit ID

Reconnect Kronoterm Cloud

Username
Password

After setup

Username
PasswordLeave blank to keep the current Cloud password.
Scan interval (seconds)
Thermal energy multiplierChoose auto to detect using SCOP, or force 0.1 or 1.0. Changing this can affect recorded energy statistics.

Texts from the code of Favio25/Kronoterm-homeassistant.

Entities

Binary sensorsMain Circulation Pump, Circulation Loop 1, Circulation Loop 2, Circulation Loop 3, Circulation Loop 4, Circulation Pump, DHW Circulation Pump, Circulation DHW, Defrost Status, Reserve Source Status, Alternative Source Status, and 6 more
ButtonsReimport Energy Statistics, Acknowledge alarm
ClimateDHW Thermostat, Loop 1 Thermostat, Loop 2 Thermostat, Loop 3 Thermostat, Loop 4 Thermostat, Reservoir Thermostat, Pool Thermostat
NumbersLoop 1 Eco Offset, Loop 1 Comfort Offset, Loop 2 Eco Offset, Loop 2 Comfort Offset, Loop 3 Eco Offset, Loop 3 Comfort Offset, Loop 4 Eco Offset, Loop 4 Comfort Offset, DHW Eco Offset, DHW Comfort Offset, Heat Pump Eco Offset, and 5 more
SelectsLoop 1 Operation Mode, Loop 2 Operation Mode, Loop 3 Operation Mode, Loop 4 Operation Mode, DHW Operation Mode, Operational Mode, System Regime
SensorsDHW Current Temperature, DHW Target Temperature, DHW Boiler Temperature, External Source Temperature, Inlet Air Temperature, Compressor Status, Error Status, Warning Status, Additional Source Status, Reserve Source Status, Pool Temperature, and 153 more
SwitchesHeat Pump ON/OFF, DHW Circulation, Fast Water Heating, Antilegionella, Luxury Shower, Reserve Source, Holiday Mode, Loop 1 Use JSON Temp Source, Enable Reservoir Climate Entity, Reserve Source (Backup Heater), Additional Source Control

Troubleshooting

DiagnosticsDownloads a diagnostics file to attach to a bug report.

From the README

A comprehensive Home Assistant integration for Kronoterm heat pumps, supporting both Cloud API and local Modbus TCP connections.
Cloud API: Internet-based connection using Kronoterm mobile app credentials
Modbus TCP: Local network connection via RS485-to-Ethernet adapter
Modbus RTU: Direct serial connection via RS485 (USB or GPIO)
Seamless switching: Reconfigure between modes without losing entity history

From the README of Favio25/Kronoterm-homeassistant, MIT License. Shortened.