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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.
There's already a ready made solution you can connect with OpenHAB called Find3 that uses Bluetooth and WiFi signals and combines it with "machine learning" do basic room detection.
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