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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.
You can't run Pihole, but there's no reason why you couldn't run a basic adblocker on a Pico W. Someone's already written something similar for the ESP32: https://github.com/s60sc/ESP32_AdBlocker
NOTE:
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