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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.
Possible? Sure. I've got temperatures displayed as bar graphs on RGB LEDs during heating using an excellent plugin (https://plugins.octoprint.org/plugins/ws281x_led_status/).
NOTE:
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Hence, a higher number means a more popular project.