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How to Build a Raspberry Pi Telemetry Dashboard for Home Automation

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Home Assistant's default SQLite recorder struggles with long-term sensor data, slowing down on range queries as history tables grow beyond a few weeks. A three-container Docker Compose stack — InfluxDB 2.x, Grafana OSS, and Telegraf — running on a Raspberry Pi 4 addresses this limitation. The setup consolidates fragmented data sources such as network routers, UPS interfaces, and uptime monitors into a single unified dashboard. InfluxDB's time-series storage engine handles continuous data ingestion far more efficiently than SQLite, while Grafana enables cross-signal alerting and pattern analysis. A USB SSD is recommended over an SD card to handle InfluxDB's write-heavy workload and avoid storage failures.

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