Receiving UDP traffic

James_Dowse · February 26, 2018, 6:44pm

I have a device that is spitting out UDP messages, I would like to pull these into hassio and create a sensor from the data. Is this easy and where should I start?

docbobo · February 26, 2018, 7:29pm

I am having the same problem, though no solution yet.

namadori · February 27, 2018, 10:50pm

I think node-red can receive udp packets and react. I’m starting using it for some automation instead of yaml and it seems very promising.

James_Dowse · March 1, 2018, 12:07am

Spot on! I now have my lightwaverf trv displaying on home assistant

glopresti · March 7, 2018, 10:11pm

Hi there,
I had the same issue with a device regularly reporting via UDP, and exploiting the existing TCP sensor I have created the following UDP sensor:

github.com

glpatcern/domotica/blob/master/homeass/code/udp.py

"""
Support for UDP socket based sensors.

For more details about this platform, please refer to the documentation at
https://home-assistant.io/components/sensor.udp/
"""
import logging
import socket
import select

import voluptuous as vol

from homeassistant.components.sensor import PLATFORM_SCHEMA
from homeassistant.const import (
    CONF_NAME, CONF_PORT, CONF_TIMEOUT,
    CONF_UNIT_OF_MEASUREMENT, CONF_VALUE_TEMPLATE)
from homeassistant.exceptions import TemplateError
from homeassistant.helpers.entity import Entity
import homeassistant.helpers.config_validation as cv

This file has been truncated. show original

Maybe useful for your case? I’m considering to do a PR and contribute it back, even though there’s quite some duplication with the TCP sensor and it could be merged with it.

skeptizzle · April 24, 2018, 10:07pm

How do I use your UDP sensor? Can you give a short explanation please?
I’m trying to get data from my pellet burner and it uses an UDP protocol.

Cheers!

glopresti · April 25, 2018, 10:11am

Hi,

The configuration is very similar to the TCP sensor. The only required parameter is the UDP port to which to listen, e.g.:

sensor:
  - platform: udp
    port: your_port
    timeout: 30
    name: your_favourite_name

Note that your HA must be able to bind and listen to that port. If you run it in a docker container, you have to either use the --net=host option when creating the container or explicitly bridge the port with -p.

Hope this helps,
Cheers,
Giuseppe

skeptizzle · April 25, 2018, 12:59pm

Does it matter if it’s Hass.io or not? I’m running Hass.io on a RPi…

glopresti · April 25, 2018, 1:30pm

Is it in a container? If so, the note above applies, otherwise I think it does not matter…

skeptizzle · April 25, 2018, 3:32pm

Ok. Thank you for the clarification and work!

glopresti · April 25, 2018, 3:36pm

No problem! Feel free to post whether it works for you on Hass.io…

Rkg90 · April 27, 2018, 11:34am

Hi

how do you use the script ?
I get a “Unable to find component sensor.udp” when starting Home assistant on RPI

Can you make a short guide on how to load the script to make the UDP sensor work

Thx

glopresti · April 27, 2018, 4:16pm

Did you copy the script to <your_hass_config>/custom_components/sensor/udp.py ? That’s where Home Assistant looks for any custom component, nothing specific to this one

Rkg90 · April 27, 2018, 6:26pm

Hi
Thx for the reply.
i now got the config of the UDP sensor working, but its not showing any data received.
Just getting these warnings in the log

glopresti · April 28, 2018, 12:15pm

Ok, that may be due to your device’s refresh interval: for example in my case I know I get an update every 60 seconds, so this is the timeout I set.

As for the warnings, this is due to the sensor being synchronous (like the TCP one) and for now I don’t have a solution.

Hope this helps

HFsi · August 24, 2018, 1:30am

I don´t quite understand where I have to use the “–net=host” or “-p” options, since in the log I get a " Unable to bind on port"
Thanks for the component!

glopresti · August 24, 2018, 8:14pm

Which command line do you use to run your homeassistant container? --net=host or -p host_port:container_port are possible options to be given to docker.

HFsi · August 25, 2018, 1:21am

I run HA in a RPi, from the image of Hass.io that I’ve downloaded of the official site…don´t even know if I´m answering what you asked, but I don´t exactly know how Hass.io works inside, sorry

glopresti · August 25, 2018, 9:27am

Well, neither do I - I run HA directly from its container and I control the way it is started, I guess Hass.io is also container-based, and if this is the case it is definitely possible to change the way it is executed. Perhaps you could ask around for more details. Sorry for not being more helpful.

HFsi · August 25, 2018, 6:22pm

Thanks anyway!