AquaSense: BLE sensor demo

Temperature, humidity and water level over Bluetooth LE. A working app against a simulated sensor.

74 s: live data, a dropped link, automatic reconnect.

Live dashboard (EN), heat alert
Live dashboard (RU)
History, statistics, CSV export
Alert thresholds
Device scan and connection
Honest scope. Verified against a software BLE simulator (same GATT structure), not on real hardware. Flutter app: scan, connect, auto-reconnect, charts, offline history, threshold alerts, CSV. It is a demo, not a product.