tempsense-exporter

This project is intended to provide a prometheus exporter for the DS18B20 based USB HID Temp Sensor made by Diamex GmbH (https://www.led-genial.de/USB-Temperatur-Sensor-Tester-fuer-DS18B20-Rev-C)

As a test util there is a cli version as well, which just outputs all active sensors.

It was initially inspired by https://github.com/kybernetyk/tempsense

build

dependencies

you need a recent golang build environment, gcc and linux headers (for karalabe/hid) to build the tempsense-exporter.

all

go build -o . ./cmd/...

exporter:

go build -o . ./cmd/tempsense-exporter

simple cli utility:

go build -o . ./cmd/tempsense-cli

install

go get github.com/vgropp/tempsense-exporter
cd $GOPATH/src/github.com/vgropp/tempsense-exporter
go install ./cmd/...

running

exporter

$GOPATH/bin/tempsense-exporter -h
Usage of /home/tric/tempsense-exporter:
  -address string
        The address to listen on for HTTP requests. (default ":9181")

cli

$GOPATH/bin/tempsense-cli

docker

Run the exporter in docker might need some tweaking. First you have to expose the usb device by adding --device=/dev/bus/usb. Additional the user in docker needs access to the device file. The default is gid 46 (group plugdev in debian). Override the default gid 46 by adding -u 1000:<gid> to your docker run command. The exporter is reachable via port 9181, override this with -p <port>:9181

Simple example: docker run --device=/dev/bus/usb -p 9181:9181 ghcr.io/vgropp/tempsense-exporter:latest

Full example: docker run --device=/dev/bus/usb -p 9182:9181 -u 1000:46 ghcr.io/vgropp/tempsense-exporter:latest

exported metrics

• tempsense_temperature_c with label device, sensors and serial (tempsense_temperature_c{device="1",sensor="1",serial="28b3bee62b200327"} 27.8)

# HELP tempsense_temperature_c shows current temperature as reported by the ds18b20
# TYPE tempsense_temperature_c gauge
tempsense_temperature_c{device="1",sensor="1",serial="28b3bee62b200327"} 27.4