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InfluxDB-Client-for-Arduino
Simple library for sending measurements to an InfluxDB with a single network request. Supports ESP8266 and ESP32.
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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.
If each ESP has WiFi access, then you can post the sensor readings straight to a database. There are libraries available for the ESP32 that make it easy to upload datapoints to e.g. an InfluxDB database. You can visualize the data in a neat dashboard with software like Grafana. You could setup a Raspberry Pi or an old laptop/pc to run an InfluxDB and Grafana server, but there are cloud options as well. There are many guides and tutorials available for getting InfluxDB and Grafana running on your own machine, often with the intention to store and visualize sensor data from various sensors at home. Then you just have to write some code with a fitting library, e.g. this InfluxDB Client that sends the sensor readings to the database.
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