THIRDREALITY Smart Presence Sensor R3 60GHz mmWave Radar — USB-C powered, RGB status ring

The R3 merges high-resolution millimeter-wave detection with environmental sensing and visual feedback to make room automations more reliable and intuitive. Rather than relying on motion alone, the R3 senses micro-movements to tell if a person is actually present, and it communicates status through a programmable RGB ring while also reporting ambient light and TVOC data where supported. It connects via Zigbee 3.0 for broad smart-home compatibility and runs continuously from a USB-C power source.

How does the 60 GHz mmWave radar improve presence detection?

The millimeter-wave radar detects tiny movements such as breathing and small posture shifts that traditional PIR sensors miss. This reduces false off events in quiet spaces and maintains lighting or automations while someone is stationary.

• Detects micro-movements including breathing for true presence recognition.
• Adjustable detection distance to avoid false triggers from adjacent rooms.
• Works reliably in darkness and through some non-metal barriers.

What does the RGB light do and how can it be used?

The integrated RGB ring provides visual cues for occupancy, automation states, or alerts, making system status visible at a glance. You can assign colors or brightness levels to different conditions, and the light will also flash for air-quality warnings if configured.

• Ambient illumination and programmable status colors for quick room feedback.
• Flashing red when TVOC levels indicate poor air quality (platform dependent).
• Uses light as a presence indicator so lights stay on while someone remains in the room.

Which smart home platforms and devices is the R3 compatible with?

R3 uses Zigbee 3.0 and integrates with popular hubs and ecosystems including Home Assistant (ZHA & Z2M), SmartThings, and many Echo devices with built-in Zigbee. It also functions as a Zigbee repeater to strengthen your mesh network.

• Works with Home Assistant via ZHA and Zigbee2MQTT for local control.
• Compatible with SmartThings and Echo hubs (multiple generations).
• Acts as a Zigbee repeater to improve network range and reliability.

What environmental data does the R3 provide and how reliable is it?

The device reports ambient light (lux) and TVOC air-quality readings when the connected platform exposes those sensors. Availability of these readings and alert behaviors depends on the hub or software you use.

• Lux sensor supports automations based on room brightness.
• TVOC reporting enables simple air-quality alerts where supported.
• Indicator light can signal dangerous TVOC levels if your platform honors the alert.

The R3 is USB-C powered for continuous operation without batteries, making it suitable for always-on monitoring. It targets bedrooms, bathrooms, offices, and any quiet indoor space where presence must be detected reliably without motion triggers. Combined with Home Assistant, SmartThings, or Echo hubs, R3 is ideal for smarter, more human-aware automations that keep lights, HVAC, or privacy-related functions aligned with actual occupancy.

Who this is for: Installers and smart-home enthusiasts who need accurate, always-on presence detection in quiet rooms; homeowners seeking stronger Zigbee mesh and straightforward visual status; and anyone wanting lux and TVOC sensor data to feed automations. The R3 is not a medical device but a home automation sensor best used to improve comfort, convenience, and energy efficiency where traditional motion sensors fail.