--- title: "LCN" description: "LCN is a built-in integration for Home Assistant. It has 127 installs sharing analytics and works locally." canonical: "https://vulpo.app/integrations/core/lcn" url: "https://vulpo.app/integrations/core/lcn.md" last-updated: "2026-10-22" version: "1.4" --- # LCN > LCN is a built-in integration for Home Assistant. It has 127 installs sharing analytics and works locally. LCN is a built-in integration that connects Home Assistant to LCN bus installations locally through a PCHK server. It provides binary sensors, climate, covers, lights, scenes, sensors and switches. Actions cover dynamic text on LCN-GTxD displays, LED states, key locks, regulator locks, output brightness, output toggling, relays, sent keys, and variable or setpoint values, plus arbitrary PCK commands. Device triggers start automations from received code lock, fingerprint, transmitter and transponder codes, and from received send keys. Setup happens in the UI with the server address, port, credentials, dimming mode, optional acknowledgement requests and segment coupler scan attempts. Connection settings can be changed later without removing the entry. Automatic summary of Home Assistant's source code. Something wrong? [Get in touch](https://vulpo.app/contact) [Open in My Home Assistant](https://my.home-assistant.io/redirect/config_flow_start/?domain=lcn) ## Supports - **Works locally**: Talks to your devices on your own network. No vendor cloud in between. - **Set up in the UI**: Add it in Settings, Devices and services. Nothing to download. - **Device triggers**: Its devices can start automations directly. - **Change settings later**: Its connection settings can change without removing it. - **Silver quality**: Home Assistant's own rating of its code and setup experience. - **Updated with Home Assistant**: Ships and updates with every Home Assistant release. ## Setting it up It is added under Settings, Devices and services, with Add integration. ### Set up LCN host - **Request acknowledgement from modules**: Retry sendig commands if no expected response is received from modules (increases bus traffic). - **Dimming mode**: The number of steps used for dimming outputs of all LCN modules. - **Name**: Name of the LCN integration entry. - **IP address**: IP address or hostname of the PCHK server. - **Password**: Password for authorization on the PCHK server. - **Port**: Port used by the PCHK server. - **Segment coupler scan attempts**: If you have a segment coupler in your LCN installation, increase this number to at least 3, so all segment couplers are identified correctly. - **Username**: Username for authorization on the PCHK server. ### Reconfigure LCN host - **Request acknowledgement from modules**: Retry sendig commands if no expected response is received from modules (increases bus traffic). - **Dimming mode**: The number of steps used for dimming outputs of all LCN modules. - **IP address**: IP address or hostname of the PCHK server. - **Password**: Password for authorization on the PCHK server. - **Port**: Port used by the PCHK server. - **Segment coupler scan attempts**: If you have a segment coupler in your LCN installation, increase this number to at least 3, so all segment couplers are identified correctly. - **Username**: Username for authorization on the PCHK server. Texts from Home Assistant's source code, [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ## Actions - **Dynamic text**: Sends dynamic text to LCN-GTxD displays. Fields: Device, Row, Text - **LED**: Sets the LED state. Fields: Device, LED, State - **Lock keys**: Sets the key lock states. Fields: Device, State, Table, Time, Time unit - **Lock regulator**: Locks a regulator setpoint. Fields: Device, Setpoint, State - **Output absolute brightness**: Sets absolute brightness of output port in percent. Fields: Brightness, Device, Output, Transition - **Output relative brightness**: Sets relative brightness of output port in percent. Fields: Brightness, Device, Output - **Toggle output**: Toggles output port. Fields: Device, Output, Transition - **PCK**: Sends arbitrary PCK command. Fields: Device, PCK - **Relays**: Sets the relay states. Fields: Device, State - **Send keys**: Sends keys (which executes bound commands). Fields: Device, Keys, State, Time, Time unit - **Set absolute variable**: Sets absolute value of a variable or setpoint. Fields: Device, Unit of measurement, Value, Variable - **Shift variable**: Shift value of a variable, setpoint or threshold. Fields: Device, Unit of measurement, Value, Reference value, Variable - **Reset variable**: Resets value of variable or setpoint. Fields: Device, Variable ## At a glance - Kind: Built-in integration - Category: [Hubs and protocols](https://vulpo.app/integrations/category/hubs-and-protocols.md), Building automation - Number: 127 installs sharing analytics - Connection: Works locally - Upkeep: Part of Home Assistant - Needs: Built into Home Assistant - Quality scale: Silver quality scale - Domain: `lcn` - Source: In Vulpo: Light card, Quick Toggle card, Cover card, Climate card, Apple Watch, Control Center, Climate Live Activity (Pro) [Widgets & Live Activities in Vulpo](https://vulpo.app/features/widgets-and-live-activities) Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation. [About these numbers](https://vulpo.app/integrations/about) Last updated 2026-10-22. 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