Nearby Devices (lamp.nearby_device)

Records nearby Bluetooth and WiFi devices detected by the phone.

Configuration

• SensorSpec: lamp.nearby_device
• Sampling: Discrete
• Platform: iOS, Android

Usage

Nearby device scans run in the background. No participant action is required.

Data

Fields

Field	Type	Description
type	string	"bluetooth" or "wifi"
name	string	Device or network name
address	string	MAC address or device identifier
strength	number	Signal strength in dBm (RSSI). Closer to 0 = stronger signal.

Signal Strength Reference

RSSI	Signal Quality
−30 dBm	Excellent
−67 dBm	Very good
−70 dBm	Acceptable
−80 dBm	Poor
−90 dBm	Unusable

Example

{
  "timestamp": 1649866397374,
  "sensor": "lamp.nearby_device",
  "data": {
    "type": "bluetooth",
    "name": "device1",
    "address": "3FC6C779-D79C-E00A-B711-5B2C8CA3D313",
    "strength": -95
  }
}

Cortex Features

nearby_device (raw) → nearby_device_count (secondary)

Counts unique Bluetooth device addresses per time window.

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