Release 2.6.0¶

Last updated: 2026-06-24

Current Release · Branch V2.6.0

Summary¶

Release 2.6.0 introduces a new climate entity for cooling mode per heating circuit (cooling_circuit), analogous to the existing heating_circuit entity. It shares the same current-room-temperature source but writes its setpoint to the dedicated cooling setpoint register. The feature is disabled by default and is enabled via a new option in the integration's Options Flow. No breaking changes.

New Features¶

Cooling Circuit Climate Entity (cooling_circuit)¶

Affected: custom_components/lambda_heat_pumps/climate.py · custom_components/lambda_heat_pumps/const_sensor.py

For each detected heating circuit, an additional entity can now be created alongside the heating circuit entity (climate.<prefix>_hc<n>_heating_circuit): climate.<prefix>_hc<n>_cooling_circuit.

• Current temperature: identical source as heating_circuit (room_device_temperature, relative register address 4)
• Target temperature: dedicated cooling setpoint register (set_cooling_mode_room_temperature, relative register address 52) — e.g. register 5052 for HC1, 5152 for HC2, 5252 for HC3, …
• HVAC mode: cool (instead of heat for the heating circuit entity)
• Temperature range: reuses the same options as the heating circuit (heating_circuit_min_temp / heating_circuit_max_temp), since it's the same physical room

New entry in CLIMATE_TEMPLATES (const_sensor.py):

"cooling_circuit": {
    "relative_address": 4,         # room_device_temperature (same as heating_circuit)
    "relative_set_address": 52,    # set_cooling_mode_room_temperature
    "name": "Cooling Circuit",
    "unit": "°C",
    "scale": 0.1,
    "precision": 0.1,
    "data_type": "uint16",
    "firmware_version": 1,
    "device_type": "hc",
    "writeable": True,
    "hvac_mode": {"cool"},
    "state_class": "measurement",
},

The entity is created per heating circuit in async_setup_entry() (climate.py) — reusing the same central utility functions as the existing climate entities (generate_base_addresses, generate_sensor_names, build_subdevice_info, get_compatible_sensors).

New Option: Cooling Mode (cooling_mode_enabled)¶

Affected: custom_components/lambda_heat_pumps/config_flow.py · custom_components/lambda_heat_pumps/const_base.py

The integration's Options Flow now has a new "Cooling Mode" toggle (cooling_mode_enabled, default: Off). Only when enabled are the cooling_circuit entities created for all configured heating circuits:

if entry.options.get("cooling_mode_enabled", DEFAULT_COOLING_MODE_ENABLED):
    for idx in range(1, num_hc + 1):
        if "cooling_circuit" not in compatible_climates:
            continue
        entities.append(
            LambdaClimateEntity(coordinator, entry, "cooling_circuit", idx, hc_addresses[idx], sensor_translations)
        )

Translations¶

The new option and the new entity were added to both the German and English translations (translations/de.json, translations/en.json):

• Options Flow: label "Cooling Mode" / "Kühlbetrieb" with description text
• Entity name: "Cooling Circuit" / "Kühlkreis" (analogous to "Heating Circuit" / "Heizkreis")

Affected Files¶