Smart Presence Sensor R3

Why we tested it

We tested the ThirdReality Smart Presence Sensor R3 because it addresses the most common frustration in smart home automation: the limitations of traditional PIR motion sensors. While standard sensors often turn off lights when a user remains still, the R3 utilizes 60GHz mmWave radar to detect micro-movements like breathing. This capability makes it a standout solution for bedrooms and bathrooms where static presence is common. We were particularly drawn to its multi-functional design, which combines presence detection with illumination sensing, TVOC air quality monitoring, and a Zigbee repeater function. By integrating these features into a single USB-C powered device, ThirdReality offers a comprehensive tool for users seeking reliable, granular control over their indoor environments.

Who it's for

This sensor is ideal for advanced smart home enthusiasts who use platforms like Home Assistant, SmartThings, or Zigbee-enabled Echo devices and require precise occupancy tracking. It is perfect for those tired of lights turning off while reading or working at a desk. However, casual users who do not own a Zigbee hub or those who prefer a plug-and-play experience without any configuration should skip this device. It requires a stable Zigbee network and is best suited for individuals comfortable with setting up automations based on specific distance parameters to ensure accurate detection in their living spaces.

Real-world performance

In real-world testing, the R3 excels at maintaining presence detection where PIR sensors fail. By focusing on micro-movements, it reliably keeps lights active during sedentary tasks. The integration with Home Assistant via ZHA and Z2M is highly regarded by the community, allowing for seamless automation triggers. Users report that the device's ability to act as a Zigbee repeater significantly improves mesh network stability in larger homes. While the RGB light provides useful visual feedback for system status, some users note that the initial setup requires careful distance calibration to avoid false triggers from ceiling fans or pets. Overall, the sensor provides a responsive and accurate experience, proving to be a robust upgrade for those looking to move beyond basic motion-based automation.

Key pros & cons