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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.
for ESP8266, here is an example time clock program for obtaining time via NTP: https://github.com/PaulStoffregen/Time/blob/master/examples/TimeNTP_ESP8266WiFi/TimeNTP_ESP8266WiFi.ino
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