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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.
That sounds like a really nice solution. I haven't used it myself, but it might be worth checking out and extending something like https://github.com/firmata/arduino, if you haven't already. Good luck!
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