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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Some of them are open source: https://github.com/sifive/freedom
So this board has an open source CPU: https://www.sifive.com/boards/hifive1-rev-b
This does not: https://www.sifive.com/boards/hifive-unmatched
Although, I get the feeling they will open source design on a rolling basis. Pure speculation.
Robert C. Nelson has been doing a stellar job of maintaining the omap-image-builder repo:
https://github.com/RobertCNelson/omap-image-builder
(and https://elinux.org/BeagleBoardUbuntu)
It's pretty easy to use to build an image for Debian Buster/Stretch or Ubuntu Bionic Beaver, he has various configurations that cover IoT, console only/headless, GUI and a few other combos. It's pretty easy to create your own config with the Kernel and packages that you want.
The images can be used for flashing to the eMMC via an SD card (or via USB).
I've found images built this way to up very up to date and absolutely rock solid thanks to Robert's curation.
The solution I'm going for (for a similar problem, reading moisture from multiple plants on one esp8266) is tying the outputs from all the sensors together, and only turning on one at a time
Like this guy:
https://github.com/sfgabe/custom_scripts/blob/master/plant_m...
Robert is the best. Looks like he'll be involved with this project too.
https://github.com/RobertCNelson/riscv64-multiplatform