The Milesight VS321 Wireless AI Occupancy Sensor is a battery-powered solution designed to optimise modern workplaces through highly accurate, fully anonymous people counting and desk occupancy detection. With up to 95% occupancy accuracy, the VS321 delivers reliable, real-time insights that help organisations improve space utilisation, reduce energy waste and create smarter working environments.

Accurate People Counting & Desk Occupancy Detection

Supporting both regional people counting and workstation-level desk detection, the VS321 enables data-driven workplace optimisation. With configurable detection intervals and 4–8 desk detection zones, it provides actionable occupancy insights to support hot-desking, layout planning and flexible office strategies.

By understanding how spaces are truly used, businesses can unlock measurable performance improvements across their workplace footprint.

100% Anonymous AI Detection

The VS321 combines PIR motion sensing with an RGB camera and embedded AI algorithms to achieve up to 95% detection accuracy. Detection is triggered by motion, reducing unnecessary power usage while ensuring precision.

Importantly, the device is fully GDPR-compliant and performs 100% anonymous detection, no images are stored or transmitted. This makes it ideal for organisations seeking accurate people counting without compromising privacy.

Wireless Installation with 10+ Years Battery Life

Designed for effortless deployment, the VS321 is completely wireless and battery-powered, offering 10+ years of battery life through intelligent power management and low-power AI processing.

With no cabling or construction required, it is perfectly suited to retrofits, heritage buildings and complex office layouts. Installation is fast, flexible and cost-effective.

Smart Lighting & HVAC Automation

As a powerful wireless occupancy sensor for lighting control, the VS321 enables automation based on real usage. When occupancy is detected, lighting can automatically adjust to reduce energy consumption and improve comfort.

Integrated temperature, humidity and ambient light sensors provide additional environmental awareness, while occupancy data can support HVAC adjustments for enhanced energy efficiency.

LoRaWAN® Connectivity & Milesight D2D Control

The VS321 supports LoRaWAN® connectivity for remote monitoring, data visualisation and centralised management.

It also features Milesight Device-to-Device (D2D) control, enabling direct communication between compatible devices without requiring a gateway. This allows ultra-low latency automation and simplified smart office deployment.

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. It is equipped with built-in temperature, humidity, and ambient light sensors to provide comprehensive environmental monitoring. Its wire-free design enables effortless and flexible installation. With simple configuration and wireless detection, VS321 can be integrated with the Milesight LoRaWAN® gateway and Milesight Development Platform, enabling remote monitoring, data visualization, and centralized management. As a Milesight D2D controller, VS321 seamlessly communicates with other Milesight D2D devices, peer-to-peer interaction without gateway dependency. VS321 can be used in scenarios such as meeting rooms, offices, and campuses to detect space occupancy or personnel activity.

Features

• Achieves up to 95% detection accuracy1 with advanced AI recognition and analysis technologies
• Adopting a low-power AI chip and PIR triggered detection, combined with scheduled hibernation, effectively reduces overall power consumption
• Supports switching between People Counting and Desk Occupancy modes to meet various needs across different scenarios
• Integrates temperature, humidity and light sensors to enable comprehensive environmental awareness and intelligent scenario-based control
• Wireless and battery-operated design ensures simple, fast and easy installation
• Stores local historical records and supports retransmission to prevent data loss
• Fully GDPR-compliant, with no image collection, ensuring privacy and data security
• Supports Milesight D2D protocol for ultra-low latency, direct device-to-device control without a gateway
• Fully compatible with standard LoRaWAN® gateways and network servers
• Supports remote monitoring and management via the Milesight Development Platform

1 Tested within Optimal Detection Range.
2 Prolonged operation may lead to overheating and reduced detection performance.
3 Tested under laboratory conditions and for guideline purposes only.