Serial over Ethernet with HA (piefed.zip)

submitted 1 month ago by SwingingTheLamp@piefed.zip to c/homeassistant@lemmy.world

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I just picked up a 4K commercial display to upgrade my TV for cheap. It has an RS232C port on the back for control, and Home Assistant has a native integration to control it via a local Linux tty. The hitch is that my Home Assistant server is located in a spot not near the television, and running physical serial line to it would be inconvenient. But, since I have a Raspberry Pi connected as the streaming media box, I should be able to plug a USB adapter into it and route the serial data over the network, right?

Is there a a good way to do this in HAOS?

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[-] Jenseitsjens@lemmy.world 5 points 1 month ago

As mentioned by CondorWonder, the LG via Serial HA Integration can already connect to a TCP socket instead of a TTY device.

If you want to use your Raspberry Pi as the serial proxy server, there's tons of options. To recommend something kinda modern, I'd put a systemd service on your raspberry pi which starts netcat on a stty, see https://stackoverflow.com/a/71173551/2232127 as an example.

[-] fonix232@fedia.io 3 points 1 month ago

I think even a simple ESP32 would serve well as a serial to TCP adapter. And it's considerably cheaper.

[-] Jenseitsjens@lemmy.world 2 points 1 month ago

Well since the Pi is already there and has a serial interface, getting an ESP32 is still more expensive :)

[-] SwingingTheLamp@piefed.zip 1 points 1 month ago

Thanks! I see now that HA documentation just assumes that one knows that one can use the URL schema to specify the "port, " without saying so. iYKYK, I guess.

this post was submitted on 14 Sep 2026

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