Home Assistant integration plugin for BMR HC64 heating controller. This controller has many quirks but overall it is quite usable in Home Assistant. The plugin provides entities from these Home Assistant platforms:

• binary_sensor
• climate
• sensor
• switch

For normal use, use HACS to install the plugin. I assume you already have HACS in your Home Assistnt installation.

Steps:

1. Open "Community Store" in the side menu

2. Click the "dots" menu in the top-right corner

3. Select "Custom repositories"

4. Enter https://github.com/dankeder/HomeAssistant-BMR into "Repository" field and choose "Integration" in the "Type" field

5. Click "Add" and close the dialog

6. A new integration "BMR HC64" should now be available for download. Find it and click the "Download" button.

Alternatively you can install the plugin manually: copy custom_components/ to your Home Assistant config directory.

The integration is configured using the Home Assistant UI. The YAML configuration is no longer supported.

Add the BMR HC64 controller device to Home Assistant:

1. Go to "Settings -> Devices & Services"

2. Click "Add integration" in the bottom right corner

3. Search for "BMR HC64", then click on it to show the configuration dialog

4. Fill in the form

5. Click Submit.

Add heating circuits:

1. Go to "Settings -> Devices & Services -> BMR HC64"

2. Click the three dots to show the BMR HC64 controller menu

3. In the menu click "Add heating circuit"

4. Fill-in the form

5. Click Submit

6. Repeat for every circuit you want to configure.

The actual names of entities depend on the controller device name that was configured above.

Provided entities:

• binary_sensor.<controller-name>_hdo: Binary sensor for indicating the state of HDO (low/high electricity tariff)

Climate entity for the given heating circuit. It supports setting HVAC mode, HVAC presets, target temperature, power on/off.

Provided entities:

• climate.<controller-name>_<circuit-name> for every configured circuit

The concept of "circuits" represents heating circuits that will be handled by the integration. Usually the circuit corresponds to a room it is located in, but sometimes the circuit can heat multiple rooms as well.

In my heating system the HC64 controller has two circuits per room - the "room" circuit which is measuring air temperature and "floor" circuit which is measuring floor temperature. Controller will start heating when both circuits have lower temperature than their target temperature. An electrician would say they are conected in series. This is unneccesarily complicated and it sometimes results in unpredictable behaviour so I recommended to configure the floor circuit in such a way that it almost always "wants" to heat by setting its target temperature to a high value (e.g. 32 C) and configure only the "room" circuit in Home Assistant.

Supported HVAC modes:

• Auto mode: Let the heating controller manage the temperature automatically using the configured schedules. It is possible to configure up to 21 schedules that are rotated daily.

• Heating (Manual mode): Set the target temperature for the circuit manually. This works by switching the circuit to a "manual" schedule specified in circuit configuration and setting the target temperature of the schedule. Make sure the "manual" schedule is not used by some other circuit, otherwise you will observe weird behaviour. The reason for using a special schedule for manual mode is to preserve settings of the schedules used by Auto mode.

• Off: Turn off the heating circuit. Internally this works by assigning the circuit into the "summer mode" and turning the summer mode on.

Supported HVAC presets:

• None: Normal operation, the controller will control target temperature according to the configured schedules

• Away: Turn on the "away" mode. This will set the target temperature of the circuit to the configured "Away temperature". Intenally this works by turning on the "low" mode of the HC64 controller and assigning the affected circuits to it.

Sensor entities for reporting current and target temperature of circuits.

Provided entities:

• sensor.<controller-name_<circuit-name>_temperature for every configured circuit
• sensor.<controller-name_<circuit-name>_target_temperature for every configured circuit

Switches for controlling the "Away" mode and "Power". When these are used they affect all configured circuits.

Provided entities:

• switch.<controller-name>_away
• switch.<controller-name>_power

The switch.bmr_hc64_away switch will toggle the "Away" mode for all configured circuits. Internally this works by turning on the "low" mode in the controller and assigning all circuits to it.

The switch.bmr_hc64_power switch will toggle power for all circuits. Internally this works by enabling the "summer" mode in the controller and and assigning all circuits to it.

Cooling support is implemented, but it has not been tested (I don't have a water-based circuits). But it should work. Probably.