Use an Arduino Uno, an Ethernet shield and a temperature sensor as a exporter for Prometheus.

• Arduino Uno
• W5100 ethernet shield
• DS18B20 temperature sensor

Modify the src/main.cpp file and set STATIC to 1 or 0 depending if you want a static IP or DHCP.

This project was intendet to be build and flashed with Platformio. When you have it installed you can run platformio run to get all dependencies and platformio run -t upload to compile&uploda to your Arduino

arduino_temperature{sensor="ds18b20",mac="de:ad:be:ef:fe:ed"} 27.44