This stack keeps the live dashboard, telemetry history, and operator controls in one place. Node-RED runs the workflow, Grafana handles reporting, and Telegram stays on alert duty only.
The /ui dashboard is the live operator surface. It shows sensor values, flood condition, and alert state at a glance.
The Node-RED editor is behind HTTPS and proxy auth, then the internal Node-RED login adds one more layer for flow changes.
Grafana is kept for review, graphs, and proof. It is not the main operator control surface.