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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.
This "notification" from the screenshot looks very similar to the pop-up produced by this network widget https://github.com/pltanton/net_widgets. With a quick check in you rc file, I can confirm you indeed use a wifi widget, and the code is also very similar to what the readme says.
NOTE:
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