DS18B20 based simple temperature logger for the Raspberry Pi
Based off Matt Hawkins's code http://www.raspberrypi-spy.co.uk/2013/03/raspberry-pi-1-wire-digital-thermometer-sensor/
Tested on Arch Linux
Add the following to /boot/config.txt
dtoverlay=w1-gpio,gpiopin=4
Put temp-logger.py into /usr/bin, and temp-logger.service into /etc/systemd/system/multi-user.target.wants