If you are building for venues, the problem is not just "count people." It is state management at scale.
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‎A solid system needs:
‎- Identity:RFID / BLE / QR / badge linked to a ticket or role
‎- Events: Entry, exit, zone transition — with timestamps
‎- Rules:Who can enter which zone, when, and how many times
‎- Live aggregates:* Occupancy per zone, updated in seconds, not minutes
‎- Resilience: Offline check-in at gates, then sync when network returns
‎- Audit:Immutable logs for compliance and post-event analysis
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‎The hard parts are not the sensors. They are deduplication, offline sync, clock drift, and keeping the dashboard fast when 10,000 people enter in 30 minutes.
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