go-lmsensors

Linux hardware sensor monitoring in Go.

Uses the lm-sensors (linux monitoring sensors) pacakge, on top of the hwmon kernel feature.

Setup

• Install lm-sensors
  • Ubuntu: sudo apt install lm-sensors libsensors-dev
  • Arch: pacman -S lm_sensors
• Configure lm-sensors
  • Run sensors-detect
  • Make any necessary adjustments to the configuration in /etc/sensors3.conf, using /etc/sensors.d/*
• go get github.com/mt-inside/go-lmsensors

How it works

This module links against the C-language libsensors and calls it to get sensor readings from the hwmon kernel subsystem (which it reads from sysfs).

My original version ran and parsed sensors -j, as all the information is in that JSON if you really squint and know how to read it. However, using the library direct seemed faster, avoids a fork(), and doesn't require lm-sensors to be installed, just libsensors5 (some package managers have them separately). (The instructions say to install lm-sensors, becuase you almost certainly want to run sensors-detect.)

The hwmon data are exposed through sysfs, but those are raw values - libsensors isn't just a convenience binding; it scales raw values according to a big built-in database, and lets the user rename sensors.

Example

Code

package main

import (
	"fmt"
	"log"

	"github.com/mt-inside/go-lmsensors"
)

func main() {
	sensors, err := golmsensors.Get(true, true)
	if err != nil {
		log.Fatalf("Can't get sensor readings: %v", err)
	}

	for _, chip := range sensors.ChipsList {
		fmt.Println(chip.ID)
		for _, reading := range chip.SensorsList {
			fmt.Printf("  [%s] %s: %s\n", reading.SensorType, reading.Name, reading.Value)
		}
	}
}

Output

it8792-isa-0a60
  [In] PM_CLDO12: 1.504000
  [Fan] SYS_FAN4: 0.000000
  [In] VIN0: 1.788000
  [In] DDR VTT: 0.665000
  [In] Chipset Core: 1.090000
  [In] six: 2.780000
  [Temp] PCIEX4_1: 37.000000
  [Temp] System2: 34.000000
...