Observed arrival · 2026-10-14
SansaSpot: room occupancy without cameras
A student-built system estimates how many people are in a room using changes to WiFi signals and nearby Bluetooth devices.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People checking study-room or lab availability
- Worth noticing
- Four ESP32 boards exchange signals 100 times per second; estimates are checked against manual counts.
Field notes
The described setup combines WiFi channel-state information from four corner nodes with Bluetooth broadcasts heard by a central Raspberry Pi Pico W. Its page says the estimates are calibrated against hand counts and displayed with an uncertainty range; the sampled room panel was still waiting for data. The team identifies itself as students at Universidad Técnica Federico Santa María, presenting the project at Muestra TECH 2026.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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