Wireless AI Occupancy Sensor

The VS321 is a low-power, battery-operated wireless occupancy sensor empowered by advanced AI algorithms. It achieves up to 95% occupancy detection accuracy powered by its AI algorithm, combining PIR motion sensing with an RGB camera and embedded AI processing. The device integrates temperature, humidity, and ambient light sensors to enable comprehensive environmental monitoring and intelligent scenario-based control. Fully GDPR-compliant with no image collection, the VS321 ensures privacy and data security while providing actionable insights for workspace optimization, energy efficiency, and building automation.

Features

Advanced AI-Powered Detection: Up to 95% occupancy detection accuracy combining PIR sensor with RGB camera and AI algorithms
Dual Operating Modes: Switchable between People Counting and Desk Occupancy modes for different scenarios
Wide Field of View: 129° horizontal and 93° vertical coverage
Environmental Monitoring: Integrated temperature, humidity, and ambient light sensors
PIR Motion Detection: 115° measuring angle with 4m detection radius
Battery Powered: 4 × 2700 mAh ER14505 Li-SOCl2 replaceable batteries with extended battery life (up to 5 years at 8h/day operation, 5-min intervals)
Low Power AI Chip: PIR triggered detection with scheduled hibernation for reduced power consumption
LoRaWAN® Connectivity: Fully compatible with standard LoRaWAN® gateways and network servers
Milesight D2D Protocol: Ultra-low latency direct device-to-device control without gateway
Data Reliability: Local historical storage (2045 entries) with retransmission support to prevent data loss
Wireless Installation: Simple, fast deployment without wiring requirements
Privacy Compliant: Fully GDPR-compliant, no image storage
Flexible Configuration: Bluetooth and USB Type-C for setup and temporary power
Advanced Features: Data storage, threshold alarms, hibernate mode, and data retrievability

Technical Specifications

Occupancy Detection

Field of View: 129° horizontal, 93° vertical
Installation Height: 2.4m to 4m
Required Illumination: 50 Lux minimum
Detection Zones: 4-8 desk detection zones

PIR Sensor

Measuring Angle: 115°
Detection Area: Radius 4m (at 15°C, 3m installation height)

Temperature Sensor

Technology: Digital CMOSens® (MEMS)
Range: -40°C to +125°C
Accuracy: ±1°C
Resolution: 0.1°C

Humidity Sensor

Technology: Digital CMOSens® (MEMS)
Range: 0 to 100 %RH
Accuracy: ±2.5 %RH
Resolution: 0.5 %RH

Light Sensor

Technology: Photodiode
Status: Bright/Dim detection

LoRaWAN® Specifications

Protocol: LoRaWAN®, Milesight D2D
Frequency: CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1/2/3/4
Tx Power: 16 dBm (868 MHz) / 20 dBm (915 MHz) / 19 dBm (470 MHz)
Sensitivity: -137 dBm @ 300 bps
Work Mode: OTAA/ABP, Class A
Antenna: Internal

Power and Battery

Power Supply: 4 × 2700 mAh ER14505 Li-SOCl2 replaceable batteries
Battery Life: Up to 5 years (8h/day operation, 5-min detection and report interval, 25°C)
USB: Type-C port for temporary power supply

Physical Characteristics

Configuration: Bluetooth, USB Type-C
LED Indicator: 1 × status indicator
Button: 1 × multi-function button

Use Cases

Workspace Optimization: Monitor desk and room occupancy for efficient space utilization
Meeting Room Management: Track occupancy to improve scheduling and efficiency
Lighting Control: Automatically adjust lighting based on room occupancy for energy savings
Environmental Comfort: Monitor temperature, humidity, and ambient light for healthier work environments
ESG and Sustainability: Support energy efficiency goals through intelligent automation
Building Automation: Enable smart scenario-based control across facilities

Thinger.io Integration

This device communicates via LoRaWAN®, enabling seamless integration with Thinger.io for remote monitoring, data visualization, and intelligent automation workflows.

Requirements

A LoRaWAN® server is required to communicate the VS321 into Thinger.io, some options are:

Alongside, the corresponding plugin for the selected LoRaWAN® server needs to be installed in your Thinger.io instance.

Get Started

Installation

Look for the plugin in the Thinger.io Plugin Store and install it in your Thinger.io instance. Once the plugin is installed a new Product will be created for this device.

Configuration

The Product is already preconfigured, check that the auto provision prefix matches the one selected in your LoRaWAN® server plugin in Thinger.io, or change it to your desire.

Usage

Start sending uplinks for autoprovisioning devices and buckets. This product also provides a predefined dashboard and downlinks.

Additional Resources

Milesight resources can be found at: