The WS302 is an IoT sound level sensor — it measures ambient decibel (dBA) levels, not people. It is used with the Vemcount Realtime IoT widget to display live noise levels on a dashboard and trigger alerts when thresholds are exceeded.

Use cases

Noise level monitoring in offices, warehouses, gyms, or entertainment venues
Alert when ambient sound exceeds safe working limits (e.g. 65 dBA threshold)
Correlate noise events with footfall data on dashboards

Step 1 — Configure via NFC (Milesight ToolBox)

Download Milesight ToolBox (iOS or Android).
Enable NFC, open the app, and hold your phone against the WS302.

Step 2 — General settings

Reporting Interval

2 minutes (recommended for monitoring). Range 1 min–unlimited

LED Indicator

ON (visible confirmation the sensor is active)

Frequency Weighting

A — matches human ear response (most common setting)

Fast Time Weighting

OFF (uses standard 125ms response approximating human hearing)

Step 3 — Calibration (optional)

Enable Sound Pressure Level (SPL) calibration if the sensor is deployed in an environment with constant background noise (e.g. warehouse machinery). Set the calibration value to the ambient baseline so readings reflect relative noise above that baseline.

Step 4 — Threshold alert

SPL Threshold

Default threshold

65 dBA (standard safe working level — adjust for your environment)

Direction

Over — fires when dBA exceeds the set value

Step 5 — LoRaWAN network settings

LoRaWAN Version

V1.0.2 (preferred)

Join Type

OTAA

App EUI

24E124C0002A0001

Application Port

Application Key

5572404C696E6B4C6F52613230313823

Support Frequency

EU868 (Europe) or match your region

ADR Mode

Important: After changing any settings in ToolBox, always tap Write to apply them to the device. Settings are not saved until written.

Step 6 — Register in Vemcount and display on dashboard

Register the WS302 in ⚙ Settings → Devices with Vendor = Milesight IoT and the correct DevEUI.
On a dashboard, click + → Widget → Realtime.
Select Source Type → choose the WS302 → select Sound Level (dBA) as the metric.
Save — the widget will display live dBA readings updating at your configured interval.

Sound level reference guide

30–40 dBA

Quiet office, library

50–60 dBA

Normal conversation, open office

65 dBA

Typical alert threshold — prolonged exposure may be tiring

70–80 dBA

Busy restaurant, busy retail floor

85+ dBA

Workplace health and safety concern — hearing protection may be required

7PM

GMT+2

7PM

GMT+2

7PM

GMT+2

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