Milesight occupancy and desk sensors connect to Vemcount as IoT data sources, displayed via the Presence Overview widget (desk/seat grid) or the Realtime IoT widget (live metric). This guide covers VS121, VS340/341, VS370, and VS321.

Sensor selection guide

VS121

AI Workplace Occupancy Sensor. Overhead ceiling mount (2.0–4.0m). Detects presence at individual desks, seats, or meeting rooms using AI vision. Works in 0 lux. Ethernet/PoE. Best for open-plan offices and co-working spaces.

VS340 / VS341

Desk & Seat Occupancy Sensor. Mounts directly under the desk or on the seat. LoRaWAN battery-powered. Ultra-compact. Best for individual hot-desks, library seats, or any scenario where overhead mounting is not possible.

VS321

Wireless AI Occupancy Sensor. Room and zone-level presence detection. LoRaWAN or PoE. Good for meeting rooms and enclosed spaces.

VS370

Radar Human Presence Sensor. Detects presence through non-metallic surfaces and in complete darkness. No camera. Ceiling or wall mount. LoRaWAN. Good for private offices, phone booths, quiet rooms where camera-based sensors are not acceptable.

Vemcount widget mapping

Presence Overview widget

Shows individual sensor states (occupied/free) as a visual grid — ideal for a floor plan view showing which desks are available right now. Add via Dashboard → + → Widget → Presence Overview → Zone and sensor overview mode.

Realtime IoT widget

Shows a live metric from any sensor (occupancy count, percentage, CO2, temperature, etc.). Add via Dashboard → + → Widget → Realtime → select sensor → select metric.

Live Inside widget

Shows total occupied count across a zone. Add via Dashboard → + → Widget → Live Inside → select zone.

VS121 — technical specifications

Technology

AI vision-based presence detection

Mounting height

2.0 – 4.0 m ceiling mount

Detection area

Up to ~3m × 3m per sensor at 4m height

Required illumination

0 lux (built-in IR)

Privacy

GDPR-compliant, no personal data transmitted

Connectivity

PoE (802.3af) or Cellular · HTTP(S)/MQTT(S)

Power

PoE 802.3af or DC 12V

Operating temp

0°C to 45°C

VS340/VS341 — technical specifications

Technology

Infrared/AI presence detection

Mounting

Under-desk or seat mount (adhesive/magnetic)

Connectivity

LoRaWAN (requires Milesight gateway)

Power

Battery — years of operation at standard intervals

Operating temp

-20°C to 60°C

IP rating

IP30

Connecting to Vemcount

VS121 (Ethernet) — Configure HTTP push in the VS121 web interface to https://data.vemcount.com/ss/milesight. Register in Vemcount → Settings → Devices → + Add sensor → MAC address → Vendor: Milesight.
VS340/VS341 (LoRaWAN) — Requires a Milesight LoRaWAN gateway configured to push to ttn.vemcount.app UDP 1700. Register each sensor's DevEUI in Vemcount under the correct zone.
Add to dashboard — Once registered and data is flowing, add a Presence Overview or Realtime widget to your dashboard and select the sensor/zone as the source.

Use case example: A co-working space with 80 desks uses VS340 under each desk. Vemcount's Presence Overview widget shows a live grid of occupied vs free desks on a lobby screen. The Live Inside widget shows total occupied count updated every minute. Members check desk availability on a TV display at reception.

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