I did the same as @LosinIt, chose the Raspberry Pi, InfluxDB and Grafana route. Though I haven't used the charting options on Hubigraph, I would still recommend at least taking a look (like you have done) before investing in a rpi, if you would have to buy one like I did.
I posted a similar question before I started. The thread includes some of mine and others experiences, as well as links to the InfluxDB logger and grafana setup I used.
Feel free to take a look and ask any questions, always happy to help.
Simon
