System Architecture: Building a Real-Time Physical Analytics Dashboard with MQTT and Edge RFID

Short summary

Technical case study building live analytics dashboards for a 15,000-person B2B event in Riyadh using passive RFID attendee tracking. Three-layer architecture: RFID antennas read attendees 5m away, edge Node.js daemons deduplicate via MQTT and async batching, cloud layer streams live SVG heatmaps via WebSockets. Key pattern: push computation to the edge and decouple from external networks for sub-second dashboards at scale.

• •Passive RFID antennas embedded in lanyards continuously track attendees without manual scanning
• •Edge Node.js daemons perform local deduplication and batch MQTT messages asynchronously to cloud
• •WebSocket layer delivers real-time SVG floor heatmaps and sponsor ROI tracking despite network latency

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