Up to 5 remote sensors
A LoRa hub-and-sensor system that detects rope or string movement, distinguishes four movement levels and identifies the triggered sensor.
The system monitors rope or string movement at up to five remote sensing points. Each sensor distinguishes four movement levels based on speed and sends the event to a central hub over LoRa.
The hub identifies the triggered sensor and alerts the user through LEDs, sound and vibration. Replaceable batteries power both the hub and remote nodes.
Detect movement at several separated locations and make the source and intensity of an event understandable at the hub. The electronics need to combine remote sensing, a long-range radio link and clear local alerts in compact battery-powered units.
HTS developed the custom hub-and-sensor electronics and the embedded functions for movement classification, LoRa event transmission and sensor-specific alerts. Separate STM32-based boards support the remote sensing and central notification roles.
| Parameter | Hub | Sensor |
|---|---|---|
| Board dimensions | 60 × 57 mm | 48 × 17.5 mm |
| Processing | STM32 | STM32 |
| Radio | LoRa | LoRa |
| System communication distance | Up to approximately 1 km | Up to approximately 1 km |
| Battery | CR2 | AA |
| Indication | LEDs, beeper and vibration | LEDs and beeper |
| Movement detection | Receives sensor events | Four speed-based levels |
Communication range depends on the operating environment and radio conditions.
The resulting design brings movement detection and sensor identification into a standalone monitoring system. A single hub gives the user local alerts from several remote points and identifies where each event occurred.
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