A Prometheus exporter for gathering temperature and humidity using a SHT3x sensor and the Raspberry Pi.
Wire up the sensor as described below, install the exporter using Docker and you are ready to measure the temperature and humidity of the sensor's location.
I'm using this to measure the ambient temperature in a server room and network closet. The temperature is displayed on a Grafana dashboard, and I'm receiving alerts when the temperature exceeds a threshold.
A Raspberry Pi aside, you are going to need a SHT3x temperature sensor and some method for wiring it up to the Pi. Your sensor might look different than the one pictured in the image below. You only need the VIN, GND, SCL and SDA pins.
To use the SHT3x sensor, you'll have to enable the I2C interface on the Raspberry. Run sudo raspi-config and enable I2C under "Interface Options".
Install Docker and run
docker run -p 9892:9892 --device /dev/i2c-1 lukeciel/sht3x_raspberry_exporter
That will expose the metrics on port 9892.