# Features and supported hardware

> Compare Serin Controller firmware, app controls, board support and Serin Link compatibility.

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

These tables cover the standard NanoC6 and Atom S3 Lite builds. Custom ESPHome configurations may omit features. Check your indoor unit with the [model checker](https://serin-labs.com/compatibility.html).

## Firmware and apps

Scroll sideways to read all columns.

| Firmware | Usual app route | Setup and maintenance |
| --- | --- | --- |
| ESPHome | Home Assistant | Join Wi-Fi, adopt in ESPHome and add the integration. Customize and update from the ESPHome dashboard. |
| HomeKit-compatible | Apple Home | Join Wi-Fi, then add the accessory. Extra controls and updates are in the controller web interface. |
| Matter-compatible | Google Home, Alexa, SmartThings; also Apple Home or Home Assistant through Matter | The app supplies Wi-Fi credentials during Bluetooth commissioning. Extra controls and updates are in the web interface. |

For certification and source availability, see [firmware differences](https://serin-labs.com/controller/firmware.html#differences) and [licenses and compliance](https://serin-labs.com/licenses.html).

## Controls and temperature sources

Scroll sideways to read all columns.

| Feature | What determines availability |
| --- | --- |
| Mode and target temperature | All three builds control the indoor unit. App thermostat cards expose different subsets of its modes. |
| Fan speed and vane direction | Depend on the indoor unit, firmware configuration and app. Web controls provide options some apps omit. |
| Heat-pump diagnostics | Available through the HomeKit/Matter web interface. ESPHome adds optional diagnostic entities through its configuration. |
| Bluetooth room sensor | Direct reading is available with supported sensors. HomeKit/Matter use web settings; ESPHome direct reading requires a suitable sensor configuration. |
| Home Assistant temperature entity | An ESPHome configuration can forward a temperature entity from Home Assistant. Home Assistant must remain available. |
| Serin Link room sensor | Pair Serin Link, then select it as the temperature source. Pairing alone enables control. |

See [controls and entities](https://serin-labs.com/controller/controls.html) for the values exposed, and [room sensor setup](https://serin-labs.com/controller/room-sensors.html) for each route.

## Supported boards and Serin Link

Scroll sideways to read all columns.

| Board | Released controller firmware | Serin Link |
| --- | --- | --- |
| M5Stack NanoC6 | ESPHome, HomeKit-compatible and Matter-compatible | Supported with all three standard firmware builds. |
| M5Stack Atom S3 Lite | ESPHome, HomeKit-compatible and Matter-compatible | Supported with all three standard firmware builds. |
| Other ESP32 boards | Support and build availability vary. Check the source project and the flash tool. | Do not infer support from the chip name alone. Check the particular build and board. |

Custom configurations must include Serin Link support. See the [board reference](https://serin-labs.com/parts.html) and [published builds](https://serin-labs.com/flash.html).

## Requirements and limits

All three builds use 2.4 GHz Wi-Fi. A fresh Matter installation needs a compatible hub, local IPv6 and a phone nearby for commissioning. Other app and hub requirements are listed in the [setup guides](https://serin-labs.com/controller/manual.html#install).

Only one accessory can occupy CN105; splitters are not supported. A feature listed here remains subject to the indoor unit's capabilities. For limits such as local-interface access and automatic updates, see [settings the controller does not provide](https://serin-labs.com/controller/settings.html#limits).