homeassistant

20955 readers

15 users here now

Home Assistant is open source home automation that puts local control and privacy first.
Powered by a worldwide community of tinkerers and DIY enthusiasts.

Home Assistant can be self-installed on ProxMox, Raspberry Pi, or even purchased pre-installed: Home Assistant: Installation

Discussion of Home-Assistant adjacent topics is absolutely fine, within reason.
If you're not sure, DM @GreatAlbatross@feddit.uk

founded 3 years ago

MODERATORS

GreatAlbatross@feddit.uk

greatalbatross@lemmy.world

Serial over Ethernet with HA (piefed.zip)

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

7 comments fedilink hide all child comments

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?

top 7 comments

sorted by: hot top controversial new old

[–] CameronDev@programming.dev 9 points 1 month ago (1 children)

https://esphome.io/components/serial_proxy/

https://tasmota.github.io/docs/Serial-to-TCP-Bridge/

A esp32 dev board and some soldering might work.

[–] SwingingTheLamp@piefed.zip 2 points 1 month ago (1 children)

Thanks! I've got the TV end covered, the issue is at the HAOS end. The LG serial TV integration talks to a Linux device node (e.g. /dev/ttyUSB0), so the issue is stuffing the TCP stream back into a pty.

[–] CondorWonder@lemmy.ca 10 points 1 month ago (1 children)

That’s what they’re saying - you can use an ESP32 device as a serial proxy without having to do anything special. If you already have a device attached to it you could use the socket:/… syntax below.

Per the integration documentation:

Port

The serial port the TV is connected to. This can be a local device path or a remote serial proxy URL. For example, /dev/ttyUSB0 (USB adapter), socket://192.168.1.100:2000(network proxy), or socket://esphome-device.local:6638 (ESPHome).

[–] SwingingTheLamp@piefed.zip 2 points 1 month ago

Oh, nice, thanks!

(Oddly, the documentation that came up when I looked didn't mention the socket options.)

[–] Jenseitsjens@lemmy.world 5 points 1 month ago (1 children)

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 (1 children)

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 :)