Daikin Altherma Heat Pump

Version/wersja 1.0 (2025.11.30)

ENG: Daikin Altherma heat pumps integration with Yubii and Home Center 3 series hubs, via the Modbus protocol.
PL: Integracja pomp ciepła Daikin Altherma z centralami Yubii oraz Home Center serii 3, z wykorzystaniem protokołu Modbus.

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This integration is published in form of encrypted QuickApp device. File attached below is a trial (demo) version that runs for 7 days after installation.
The full version has no time limitation and is distributed as an encrypted QuickApp, released for single Nice Yubii or FIBARO Home Center hub with serial number provided by the buyer.

Cost of full version is 100 Euro without VAT tax (for EU companies with valid EU VAT ID we can use 0% VAT tax for others 23% VAT tax will be applied, so total is 123 Euro to pay).
Cost is per one FIBARO Home Center controller.
Please contact us if you need USD calculations. 
Payment option: bank wire transfer (SEPA/Swift), Paypal
Contact and more details: smarthome @ hdev.pl 
Seller and developer: Human Devices company, VAT EU: PL8942392501
More at www.hdev.pl/en 

Compatibility

• FIBARO Home Center 3 / Lite
• Nice Yubii Home (PRO) and compatible
• FIBARO/Nice firmware version: 5.120, or newer
• Daikin Altherma Heat Pumps
• Daikin Control box DCOM-LT/MB lub  DCOM-LT/IO communication module with RS485/Modbus port
• Modbus RTU-TCP gateway (you need to buy and install it yourself)

More about Daikin Control Box:
https://www.daikin.eu/en_us/products/product.html/DCOM-LT/MB.html  

Functions for Daikin Altherma integration

• Control work mode (heating/cooling/auto/off)
• Monitor heat pump state (Compressor run, Circulation pump, 3-way valve, disinfection)
• Control main (room) temperature setpoint, both for heating and cooling mode
• Control setpoints for cold and warm water
• Monitor hot and cold water temperatures and water flow factor
• Control DHW activity and DHW temperature setpoint
• Monitor DHW temperature
• Monitor outside and room temperature
• Control Silent mode
• Support for weather-automation operation mode (without automatic setting of heating and cooling water setpoints)
• Support for heat pumps without cooling mode (cooling options are automatically hidden)
• Displays alarms and warnings

 All temperature (setpoints) settings are implemented by thermostat-type slave devices, can be set manually or automatically in scenes, profiles or via weekly schedules defined in climate zones.

How it works

The solution is based on Modbus TCP communication protocol and connects Daikin Altherma devices via a Modbus RTU-TCP gateway (hardware converter). Daikin Altherma heat pumps support only Modbus RTU (via RS485 port, 2-wires connection) available via the optional Control Box DCOM-LT/MB or DCOM-LT/IO, which must be installed with the heat pump installer.

Following Modbus RTU-TCP gateways were tested and works fine:
 • PUSR: USR-DR302, USR-DR404 i USR-W610 (www.pusr.com)
 • Waveshare: RS485 TO ETH (B), RS232/485/422 TO POE ETH (B) (www.waveshare.com/wiki)
 • Elfin: EE11A, EW11A (www.hi-flying.com)
Other gateways with same functions shall also work.

Daikin Altherma heat pump integration is available as developer (multi-device) version implemented in the form of two QuickApps, and in a compact version in the form of a single QuickApp. The trial (demo) version is only available as the compact version.