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    Milesight desk & occupancy sensors — VS121, VS340, VS370

    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

    1. 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.

    2. 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.

    3. 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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