CPU Fan speed\lmsensors in Hass.io

Configuration
1

Hello, guys!

I’m running hass.io in docker on Ubuntu 16.04 machine.

I’d like hass to keep track of CPU Fan’s speed.

What are my options here? How can I achieve this? Since there’s no lmsensors in home-assistant’s docker container.

Thanks for your time and attention!

2

I made a cron job that reported to mqtt my CPU temperature.

Found it. I have a script that contains this

t=$(cat /sys/class/thermal/thermal_zone2/temp)
t=$(($t/1000))
mosquitto_pub -h mqtt.server.local -u username -P password -t HostServer/temperature -m "$t"
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3

Hm… I’m not using mqtt so would not like to bother with it just to rin this one comand. But This made me thinking… Well I do have a custom python dashboard with some api in it. I suppose I could add something like /domain.com/api/get_cpu_rpm that would return rpm in plain text. Or json. And then use some sort of http get command from inside HASS to query that.

Just gotta find a command for http request, either hass sensor or terminal command.

4

If you want to use a Home assistant component I believe you can run Open Hardware Monitor on Linux using the Mono Framework.

5

Thanks for the suggestion,

I’m not sure how it behaves on linux, but on Windows OHM is pretty heavy, it was loading my CPU up to about 10%. Which is not good for something like this.

I ended up writing my own api endpoint which returns json of all fans from lmsensors, and using ‘rest’ in HASS. As you can imagine it’s quite lightweight, especially since it’s just a part of my already existing dashboard thing.

While I was doing that, however, I noticed that that homeassistant docker container has DNS issues, namely - it does not work. Which does not allow me to use Google Home integration, for example, as well as any other service which relies on domain names.

6

You had me worried for a moment. I just checked mine and it peaks at 0.5%, and is at 0% most of the time (i7 4790S CPU).