# Match settings to your indoor unit

> Configure supported modes, vane type, units and names so the controller matches the Mitsubishi indoor unit.

Source: https://serin-labs.com/controller/unit-settings.html
Last updated: 2026-10-27

## Before changing settings

Check the indoor unit's specifications for supported modes and louvers, then [back up your settings](https://serin-labs.com/controller/backups.html).

## Set modes and temperature ranges

On HomeKit-compatible or Matter-compatible firmware, open the [web interface](https://serin-labs.com/controller/web-interface.html) and expand **Modes**.

1. Select a mode. Turn off **Available** if the indoor unit lacks it. **Auto** requires both **Heat** and **Cool**.
2. Choose **Heat Pump Limits** to use the range reported by the indoor unit, or **Custom Limits** to set **Low** and **High**.
3. Select **Save**. If you changed availability, select **Reboot Now** below the mode list so your app receives the change.

The unit may refuse temperatures outside its reported range. **Dry** shares Cool's range; **Fan** has no range. The line below the list shows the combined range offered to your app and Serin Link across enabled modes.

[![Modes section listing each mode, its temperature range and the combined Home app and Link range](https://serin-labs.com/assets/content/860/media/webui-modes.png.a02e786d43fe.webp)](https://serin-labs.com/assets/media/webui-modes.png)

Mode availability and temperature ranges. Matter-compatible firmware shows the Matter and Link ranges.

[![Heat settings with Available, Heat Pump Limits and Custom Limits controls](https://serin-labs.com/assets/content/860/media/webui-mode-heat.png.0086c881fc91.webp)](https://serin-labs.com/assets/media/webui-mode-heat.png)

Heat with a custom temperature range.

## Set the vane type

In **Device**, set **Vane Type** to match the unit's louvers, then select **Save Settings**. **None** and **Vertical** hide unavailable vane controls.

[![Device settings with a name, temperature unit, vane type and Save Settings button](https://serin-labs.com/assets/content/860/media/webui-device.png.7776b7935aed.webp)](https://serin-labs.com/assets/media/webui-device.png)

Device settings in the HomeKit-compatible web interface. [Enlarge screenshot](https://serin-labs.com/assets/media/webui-device.png).

## Set the name and displayed units

In **Device**, set **Device Name** and select **Save Settings**. This names the web interface and a paired Serin Link. Rename the thermostat in your app separately. **Temp Unit** selects °C or °F and applies as soon as you choose it.

Matter-compatible firmware also has **Names & sensors** in the **Matter** section. It sets thermostat and fan tile names. **Separate Sensor Tiles** adds temperature and humidity tiles after the controller restarts.

## Advanced connection settings

Leave **Poll Interval** at its default unless support asks you to change it. Leave **CN105 Baud Rate** at 2400 unless the indoor unit never connects. Some models need 9600; use [CN105 troubleshooting](https://serin-labs.com/troubleshooting.html#cn105-no-data) to decide whether to change it.

See the [settings reference](https://serin-labs.com/controller/settings.html#device) for other fields.

## Configure ESPHome options

Select fitted vane axes and optional controls through the YAML generator or your configuration. Follow [Customize ESPHome](https://serin-labs.com/controller/customize-esphome.html).