LG webOS TVs

ha-lg-webos-tv controls LG televisions from Home Assistant over the TV’s own WebSocket protocol. It is in the HACS default list.

It follows the design of Home Assistant’s built-in webOS integration and adds to it:

• a remote with pointer movement, clicks, scrolling and text entry
• picture settings as numbers and selects: picture mode, backlight, contrast and the rest
• sound output and channel selection
• notifications on the screen
• services for launching apps, sending any button, changing settings and calling an arbitrary endpoint

It holds one connection per TV and the TV pushes its state. A check every ten seconds confirms the connection is alive; it does not poll for state. TVs are found on the network automatically and paired by accepting a prompt on the screen. Turning a TV on uses Wake-on-LAN.

What it took

Most of the work has been in what newer webOS versions changed: webOS 25 and 26 changed how a TV pairs.

• Setting a soundbar's volume through a TV that cannot read it: volume control when the TV cannot see the soundbar’s level.
• A callback that awaits disconnect deadlocks the connection: a deadlock in the client library, carried as a fix in a fork until upstream takes it.
• Home Assistant serves config/www without authentication: why the screenshot button was removed.