The tradfri integration allows you to connect your IKEA Trådfri Gateway to Home Assistant. The gateway can control compatible Zigbee-based lights (certified Zigbee Light Link products) connected to it. Home Assistant will automatically discover the gateway’s presence on your local network if discovery: is present in your configuration.yaml file.

You will be prompted to configure the gateway through the Home Assistant interface. The configuration process is very simple: when prompted, enter the security key printed on the sticker on the bottom of the IKEA Trådfri Gateway, then click configure.

If you see an "Unable to connect" message, restart the gateway and try again. Don't forget to assign a permanent IP address to your IKEA Trådfri Gateway on your router or DHCP server.


You can add the following to your configuration.yaml file if you are not using the discovery: component:

# Example configuration.yaml entry
  host: IP_ADDRESS

Configuration Variables

host string Required

The IP address or hostname of your IKEA Trådfri Gateway.

allow_tradfri_groups boolean (Optional, default: false)

Set this to true to allow Home Assistant to import the groups defined on the IKEA Trådfri Gateway.


Incorrect security key

Fatal DTLS error: code 20 might indicate a missing or incorrect security key. Pay close attention as e.g., “I” and “l” can easily be confused.

Firmware updates

After updating your IKEA Trådfri Gateway firmware it might be necessary to repeat the configuration process. One error you might experience after a firmware update is Fatal DTLS error: code 115. If you encounter problems:

  • when configured using the integration: remove the integration through Settings > Integrations > Tradfri > delete (trash can icon)
  • with manual configuration: delete the .tradfri_psk.conf file in your /config directory (/.homeassistant directory if using Home Assistant Core)

Then restart Home Assistant. When prompted, enter the security key and click configure, just like during initial setup.

Compilation issues

This does not apply to Home Assistant running in Docker Containers, including the default Home Assistant install.

Please make sure you have autoconf installed ($ sudo apt-get install autoconf) if you want to use this component. Also, installing some dependencies might take considerable time (more than one hour) on slow devices.

Setting the api_key

Do not use the api_key variable in configuration.yaml. The API key is only needed once at initial setup and will be stored.

Known limitations

  • The TRÅDFRI Shortcut button, Remotes and motion sensor only send information about their battery status, no events, to Home Assistant and thus can’t be used to automate with. If you want to automate with these devices, you need to use something like ZHA.