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Tracking

The Synapsys module allows you to track the location of beacons in real time, showing which zones each device is currently in.

Navigation path: the Tracking menu (available when the Synapsys module is enabled on the site).

How it works​

Tracking is based on BLE (Bluetooth Low Energy) signals:

  1. Beacons (panic buttons, asset trackers, personal tags) emit BLE signals periodically
  2. Antennas installed in each zone capture these signals and send them via MQTT
  3. The Location Engine analyzes the signal strength (RSSI) from each antenna and determines which zone the beacon is in
  4. The location is updated in real time in the interface
Beacon (BLE) → Antenna (MQTT) → Location Engine (RSSI) → Detected zone

Accuracy level​

Tracking is done at zone level — the system determines which zone the beacon is in, not its exact position within the zone. Location confidence is calculated based on:

  • Number of signals received in the time window
  • Signal strength (RSSI) — stronger signals indicate greater proximity
  • Margin between the dominant antenna and the others
  • Temporal consistency — maintaining the same zone for several cycles increases confidence

The system uses hysteresis to avoid oscillations: a beacon does not change zones if the signals are close to the threshold between two antennas.

Confidence is classified into three levels — High, Medium, and Low — combining four factors with weights: signal strength (25%), number of signals (25%), margin over the secondary antenna (30%), and temporal consistency (20%).

Location Engine parameters

The location calculation uses configurable parameters (default values):

  • Calculation interval: every 5 seconds
  • Signal window: 15 seconds
  • Minimum signals to calculate a position: 2
  • Minimum RSSI considered: -90 dBm (weaker signals are discarded)
  • Hysteresis threshold: 5 dBm of margin to switch zones

Tracking page​

The Tracking page (/tracking) shows an overview of the zones for the selected site:

Tracking page with the zone cards and the number of beacons present in each one

  • Zone list with the number of beacons present in each one
  • Real-time updates — zone entries and exits appear without reloading the page
  • Monitored events: zone entry, zone exit, beacon movement

Next steps​

  • Zone Map — Interactive visualization with floor plans
  • History — View past movement of a beacon