# Documentation

> Manuals for Serin Controller and Serin Link, and the Serin Link DIY build guide. Find assembly, setup, controls, maintenance, and troubleshooting instructions.

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

Choose your product's manual for setup, everyday controls, maintenance, and troubleshooting.

Serin ControllerThe Wi-Fi controller connected to your indoor unit's CN105 port. Serin LinkPhysical controls for your rooms.

## Serin Controller

Set up a new controller or find the task you need in the [Serin Controller manual](https://serin-labs.com/controller/manual.html).

[Browse the manualSetup, everyday controls, maintenance, troubleshooting and reference.](https://serin-labs.com/controller/manual.html) [Quick startChoose firmware, install the controller and verify control.](https://serin-labs.com/setup.html) [Update firmwareInstall a release or manage beta updates.](https://serin-labs.com/controller/updates.html) [TroubleshootingFind the cause of a connection or control problem.](https://serin-labs.com/troubleshooting.html)

## Serin Link

Start with the quick start for a new Serin Link, or go directly to the task you need.

[Quick start](https://serin-labs.com/link/manual.html) [Pair your first controller](https://serin-labs.com/link/pairing.html) [Temperature, modes and airflow](https://serin-labs.com/link/controls.html) [Rooms and zones](https://serin-labs.com/link/zones.html) [Room temperature sensors](https://serin-labs.com/link/room-sensors.html) [Display and control settings](https://serin-labs.com/link/settings.html) [Controller Wi-Fi and smart-home pairing](https://serin-labs.com/link/connections.html) [Updates and resets](https://serin-labs.com/link/maintenance.html) [Knob and touchscreen gestures](https://serin-labs.com/link/gestures.html) [Status and diagnostics](https://serin-labs.com/link/diagnostics.html) [Troubleshooting](https://serin-labs.com/link/troubleshooting.html) [DIY build guide](https://serin-labs.com/link/build-guide.html)

## Tools

These run in your browser. The setup and configuration guides link to them when you need them.

- [Flash controller firmware](https://serin-labs.com/flash.html): install firmware over USB from a computer.
- [Flash Serin Link firmware](https://serin-labs.com/flash-link.html): install Serin Link firmware over USB.
- [ESPHome YAML generator](https://serin-labs.com/esphome/generate-yaml.html): create a configuration for your indoor unit and optional features.

## Get help

Check [compatibility](https://serin-labs.com/compatibility.html), browse the [FAQ](https://serin-labs.com/faq.html), or [contact support](https://serin-labs.com/contact.html). For shared reference information, read [safety](https://serin-labs.com/safety.html), [licenses and compliance](https://serin-labs.com/licenses.html), and [security](https://serin-labs.com/security.html).