Climate
Hitachi Heat Pump
alepee/hass-hitachi_yutaki · vv2.1.7
HACSLocal polling
A custom Home Assistant integration to control and monitor Hitachi heat pumps through ATW-MBS-02 and HC-A(16/64)MB Modbus gateway.
In Apple Home through HomeKit Bridge
What HomeKit Bridge makes of each kind of entity this integration creates, read from its source code. A device only gets the ones that apply to it.
| Entity | Shows up as | Note |
|---|---|---|
switch | Switch or outlet | |
climate | Thermostat | |
binary_sensor | Sensor (motion, contact, leak, smoke…) | |
sensor | Sensor (temperature, humidity, air quality…) | |
water_heater | Water heater (as a thermostat) | |
button | Button (as a switch) | |
select | Mode picker (as switches) |
How it connects
Local polling
Talks to the device on your network, asking it for updates every so often.
Details
| Installs (analytics) | 21 |
|---|---|
| GitHub stars | 35 |
| Latest version | v2.1.7 (2026-10-22) |
| Set up in the UI | Yes |
| Maintainers | @alepee |
| License | MIT |
Devices listed in its README
- Compatible Models: Hitachi air-to-water heat pumps (2016 and newer fully supported, pre-2016 in beta)
- Tested With: Yutaki S80, Yutaki S, Yutaki S Combi, Yutampo R32
- Required Hardware: ATW-MBS-02 or HC-A(16/64)MB Modbus gateway
Limitations from the README
- Modbus TCP only: Direct serial Modbus is not supported.
- Pre-2016 models: Older Hitachi heat pumps use different register maps and are not compatible.
- Temperature precision: Internal temperature sensors have 1°C precision. Configure external sensors for more accurate COP.
- Single gateway: Each integration instance connects to one gateway. Multiple gateways require multiple instances.
- Global operating mode: Heat/cool/auto is shared across all circuits. With two circuits active, change mode via the Control Unit's operationmode` select.
- No automatic discovery: The gateway must be configured manually.
In ReReHome
Whatever HomeKit Bridge shares reaches Apple Home as normal HomeKit accessories behind your Home Assistant bridge, so ReReHome shows and controls them like any other.
Bridges get their own settings page listing the accessories behind them.
Sources
- Documentation: https://github.com/alepee/hass-hitachi_yutaki
- Source code: https://github.com/alepee/hass-hitachi_yutaki
- Issues: https://github.com/alepee/hass-hitachi_yutaki/issues
- HACS: https://hacs.xyz
