# Settings reference

> Look up Serin Controller web-interface sections, device fields, network and pairing controls, and settings that are not available.

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

## Find a section

These sections appear in the HomeKit-compatible and Matter-compatible web interface.

Scroll sideways to read all columns.

| Section | What it contains |
| --- | --- |
| **Climate** | Mode, including · **Off** · , and target temperature. |
| **Airflow** | Fan speed and vane positions. |
| **Heat Pump · CN105** | The connection to the indoor unit, compressor and outside readings, and any error code. See · [diagnostics](https://serin-labs.com/controller/controls.html#diagnostics) · . |
| **Room Sensor** | The temperature source the heat pump uses. See · [room sensors](https://serin-labs.com/controller/room-sensors.html#web-interface) · . |
| **Network · Wi-Fi** | Network name, signal, IP address, and · [changing the network](https://serin-labs.com/controller/wifi.html) · . |
| **HomeKit** | Pairing status, the setup code, and · [pairing resets](https://serin-labs.com/controller/pairing.html) · . |
| **Matter** | Pairing status, the setup code, and · [pairing resets](https://serin-labs.com/controller/pairing.html) · . |
| **Link** | A paired · [Serin Link](https://serin-labs.com/link/manual.html) · . |
| **Device** | Name, temperature units, · indoor-unit settings · , settings backup, and factory reset. |
| **Modes** | Available modes and temperature ranges · for the indoor unit. |
| **Firmware** | Installed version, · [updates](https://serin-labs.com/controller/updates.html) · , · **Flash LED** · , and · **Restart Device** · . |
| **About** | Board, addresses, restart counts, · [Copy Diagnostics](https://serin-labs.com/controller/support-info.html#diagnostics) · , and device events. |
| **Diagnostics · Logs** | Log level and the · [live log](https://serin-labs.com/controller/support-info.html#logs) · . |

## Device settings

Scroll sideways to read all columns.

| Setting | Meaning and effect |
| --- | --- |
| Device Name | Names the web interface and a paired Serin Link. It does not rename the thermostat in the app. |
| Temp Unit | Displays temperatures in °C or °F. Applies immediately. |
| Vane Type | Selects the louver axes offered. None or Vertical hides controls the indoor unit does not have. |
| Poll Interval | Time between reads from the indoor unit; default 2000 ms. Leave it unless support requests a change. |
| CN105 Baud Rate | Serial communication speed. Default 2400; some models require 9600. Consult compatibility and CN105 troubleshooting. |
| Export Settings / Import Settings | Saves or restores selected settings. Excludes Wi-Fi credentials, app pairing and some sensor settings; see · [backup contents](https://serin-labs.com/controller/backups.html#export) · . |
| Factory Reset… | Erases saved Wi-Fi, app pairings, paired Serin Link and settings, then restarts into setup. The firmware remains installed. |

For changes, follow [Match settings to your indoor unit](https://serin-labs.com/controller/unit-settings.html), [Back up and restore](https://serin-labs.com/controller/backups.html), or [Restart and reset](https://serin-labs.com/controller/reset.html).

In the Matter section, **Names & sensors** sets thermostat/fan tile names; **Separate Sensor Tiles** adds room temperature/humidity tiles after restart.

## Modes and temperature ranges

The **Modes** section lists Heat, Cool, Auto, Dry and Fan. Open a mode to change these settings, then select **Save**.

Scroll sideways to read all columns.

| Setting | Meaning and effect |
| --- | --- |
| Available | Offers the mode in the web interface, smart-home app and paired Serin Link. Auto requires Heat and Cool. After changing availability, select · **Reboot Now** · so the app shows the change. |
| Heat Pump Limits | Uses the target temperature range reported by the indoor unit. |
| Custom Limits | Sets · **Low** · and · **High** · with −/+. The indoor unit may refuse targets outside its reported range. |

Dry shares Cool's range; Fan has no range. The summary below the list shows the app and Serin Link range, spanning all enabled mode ranges. See [Set modes and temperature ranges](https://serin-labs.com/controller/unit-settings.html#modes) for the procedure.

## Sensors, network and pairing

Scroll sideways to read all columns.

| Control | Meaning and effect |
| --- | --- |
| Enable Remote Sensors / Add Sensor… | Enables remote temperature sources and discovers supported Bluetooth thermometers. |
| Single / Average | Uses one source or an average of selected remote sources. Sensor offsets adjust individual readings. |
| Change Network… | Attempts new credentials while retaining the current connection if the attempt fails. |
| Forget Wi-Fi… | Erases the saved network and restarts into setup; app pairing and other settings remain. |
| Show Setup Code | Reveals the app setup code, including when already paired. |
| Reset HomeKit Pairing | Removes app pairings; keeps Wi-Fi and other settings. |
| Reset Matter Pairing | Removes app pairings; keeps Wi-Fi and other settings. |
| Open Pairing Window | Opens a 15-minute window for adding another app. |
| Paired Controllers / Remove | Removes an individual app/home connection. Other app pairings remain. |

Use [room sensors](https://serin-labs.com/controller/room-sensors.html), [Wi-Fi changes](https://serin-labs.com/controller/wifi.html), and [app pairing](https://serin-labs.com/controller/pairing.html) for instructions and checks.

## Firmware and logs

Scroll sideways to read all columns.

| Control | Meaning and effect |
| --- | --- |
| Installed | The installed firmware version. Reload the page after an update to refresh this value. |
| Versions | Fetches published releases when opened. The browser needs internet access; the controller does not. Tags mark · **latest** · , · **beta** · and · **installed** · ; · **Other versions** · lists older releases. Select a version and confirm to install. |
| Beta updates | Prioritizes the newest pre-release and offers it as the update if newer than stable. Beta releases remain listed when off. Saved on the controller; turning it off does not change the installed version. |
| latest tag | Marks the latest stable release in · **Versions** · . To return from a pre-release, select it and confirm; · [review the downgrade warning](https://serin-labs.com/controller/updates.html#stable) · first. |
| Manual .bin Upload | Uploads a matching firmware application file; see the update guide for file and board requirements. |
| Flash LED | Flashes the identification light for three seconds. |
| Restart Device | Restarts the controller without erasing settings. |
| Copy Diagnostics | Copies the controller summary and recent device events. |
| Log Level / Live Log | Controls live log detail. The browser keeps the last 200 lines while open; Debug returns to Info on restart. |

Follow [Update firmware](https://serin-labs.com/controller/updates.html) for install steps and [Collect diagnostics](https://serin-labs.com/controller/support-info.html) for support evidence.

## ESPHome settings

ESPHome uses the entities and controls enabled in its YAML. It does not use the HomeKit/Matter Device settings page. See [standard entities](https://serin-labs.com/controller/controls.html#esphome) and [configuration options](https://serin-labs.com/controller/customize-esphome.html#options).

## Settings the controller does not have

HomeKit-compatible and Matter-compatible firmware have these limits:

- **Static IP address.** The controller gets its address from your router. To keep the address the same, reserve it for the controller in your router's settings.
- **Status light brightness.** The light cannot be dimmed or turned off.
- **Time zone.** The controller sets its clock from the internet, and the web interface shows times in your phone or computer's time zone.
- **Password for the web interface.** Anyone on your local network can open it. See [security](https://serin-labs.com/security.html).
- **Automatic updates.** The controller never installs an update by itself. See [Update firmware](https://serin-labs.com/controller/updates.html).