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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.
I flashed mine using the flasher included into a Stm32f4 discovery board I had laying around. Used this toolset https://github.com/stlink-org/stlink to flash the firmware. Not sure if you can use UART to flash, if that's so, you might be able to use a raspberry pi or Arduino as an interface which is far way more accessible than the stlink flasher.
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