onewire_exporter

Prometheus exporter for 1-wire temperature sensors connected to a Raspberry PI

Usage

./onewire_exporter

Options

Name	Default	Description
--version		Print version information
--listen-address	:9330	Address on which to expose metrics.
--path	/metrics	Path under which to expose metrics.
--ignoreUnknown	true	Ignores sensors without a name
--names	names.yaml	File mapping IDs to names"

Configuration

The names.yaml files contains the sensor id and name to use

names:
  28-0416506c85ff: temp_sensor_01

Setup

For gpio 4 append this to /boot/config.txt and reboot

dtoverlay=w1-gpio-pullup,gpiopin=4,extpullup=on

You should now see your sensors with IDs in /sys/bus/w1/devices

Example output

# HELP onewire_temp Air temperature (in degrees C)
# TYPE onewire_temp gauge
onewire_temp{id="28-0416506c85ff",name="temp_sensor_01"} 28.187

Circuit

I used DS18b20 1-wire sensors. For a long distance (50m worked fine) i used 5v power for the sensors and 3.3v with a 4.7k resistor as pull-up.