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How a 15,000-Delegate Riyadh Expo Got Real-Time Crowd Tracking via RFID and Edge Computing

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A tech team built a live physical analytics dashboard for a large B2B exhibition in Riyadh, Saudi Arabia, serving approximately 15,000 delegates. Passive UHF RFID chips embedded in attendee lanyards were read by antenna arrays installed above doorways, generating thousands of location data points per second without manual scanning. To ensure reliability, edge computing nodes processed and deduplicated data locally using MQTT before asynchronously syncing to a central cloud database, insulating the system from network outages. A React frontend consumed this data over WebSockets to render sub-second live heatmaps and sponsor ROI metrics on an SVG venue map. The architecture highlights a broader shift toward edge-first IoT pipelines for high-density physical environments where cloud connectivity cannot be guaranteed.

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