A hands-on project guide showing how to build a local IoT plant monitoring system using InfluxDB 3 Core, MQTT (Mosquitto), Telegraf, and an LLM-powered conversational interface via Claude and the Model Context Protocol (MCP). An ESP32/Arduino reads soil moisture, publishes structured JSON to an MQTT broker, Telegraf ingests it into InfluxDB 3 running in Docker, and Claude with MCP allows natural language queries like 'Has the plant been dry today?' instead of writing SQL. The architecture mirrors industrial edge setups with local data processing and no cloud dependency.
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