The THIRDREALITY Smart Presence Sensor R3 is a compact home automation device that leverages 60GHz mmWave radar technology to deliver accurate motion and presence detection. Powered via USB-C, it offers flexible placement options and reliable long-term operation. The sensor integrates an RGB status indicator light, which provides visual feedback for various device states, and includes an ambient illumination sensor for enhanced environmental awareness.

Additionally, it functions as a Zigbee repeater, helping to extend the range and stability of a Zigbee mesh network. The device is compatible with popular smart home platforms including Home Assistant (via ZHA and Z2M) and SmartThings, allowing seamless integration into existing setups. Constructed with a durable plastic housing and a clean, minimalist design, the sensor maintains a low profile while delivering robust performance. The mmWave radar technology can detect both large movements and subtle presence, such as a person sitting still or sleeping, making it suitable for occupancy-based automation scenarios like lighting control, HVAC scheduling, or security monitoring. The inclusion of an illumination sensor enables light-level-triggered routines, while the RGB LED can be customized to indicate modes, alerts, or decorative colors. Its USB-C power input ensures stable operation without battery concerns, and the Zigbee repeater functionality strengthens the network by relaying signals from other devices. In terms of performance, the sensor offers adjustable detection range and sensitivity settings, allowing users to fine-tune behavior for different room sizes and use cases. The 60GHz radar is less prone to false triggers from pets or environmental noise compared to traditional PIR sensors, delivering more reliable presence detection. The device responds quickly to changes in occupancy, with minimal delay in updating status within the smart home system. Setup is straightforward through the compatible hub platforms, and the sensor supports OTA firmware updates for ongoing improvements. This sensor is well-suited for users who want to create intelligent, presence-aware automations without compromising on accuracy or network stability. Its affordable price point positions it as an accessible option for those building a comprehensive smart home ecosystem. The combination of presence detection, illumination sensing, RGB indication, and Zigbee repeating in a single unit reduces the need for multiple separate devices, saving space and simplifying installation. The product’s build quality and reliable components ensure consistent performance over time, making it a practical addition to any Zigbee-based smart home.