Monitor temperature and humidity with Grafana and Raspberry Pi | Grafana Labs
Whether you’re in a data center, a greenhouse, or a sea-side apartment, you can use Grafana dashboards to track temperature and humidity levels.
Sample Grafana dashboard for DHT22 provided humidity and temperature

Very timely post by Grafana Labs blog about temperature and humidity monitoring. It so happened that I had some Raspberry Pi lying around so I grabbed it, picked the cheap (sub 10€, c'mon, it's a bargain!) DHT22 sensor and started playing with it. My original idea was to replicate their setup, but later on I decided that this is an awesome opportunity to write some Go and, even better, my very first Prometheus exporter. So I did: hadret/dht22_exporter.