S1 Pro Multi Sense (Zigbee)

Real-time presence and environmental sensing through Zigbee. Local Home Assistant integration with tracking for up to 3 people.

Please note: this product is currently in production and is expected to ship within 7-14 days. Due to high demand, availability may be limited, so we recommend ordering as soon as possible.

5 Year Hardware Warranty
Price
€59,95 EUR
€59,95 EUR
€65,00 EUR
Available In Stock
S1 Pro Multi Sense (Zigbee)
  • Overview
  • Specifications
Every day. In every room.

Peace of Mind, Built In.

Presence Without Cameras.

Detects presence using radar, not cameras. No images. No recordings. No watching.

Air You Can Trust.

Continuously monitors equivalent CO2, equivalent VOC, IAQ, temperature, humidity, air pressure, and gas resistance. For direct CO2 measurements, the optional SCD40 add-on can be installed.

Feedback When It Matters.

The built-in RGB LED and buzzer can be controlled directly from Home Assistant. The LED also provides a purple breathing indication while the device is not connected to Zigbee.

Privacy, By Design.

All data stays local in Home Assistant. No cloud. No subscriptions.

Understands space, not just motion.

mmWave Presence Sensing

Advanced mmWave radar continuously tracks presence for up to three people simultaneously, including their position, distance, and movement. This allows the system to understand where someone is in a room, not just that someone moved.

With support for three configurable detection zones and one exclusion zone, you can precisely control where presence should trigger automations, and where it should be ignored. Fast, continuous updates ensure detection feels instant, stable, and reliable, even when people move slowly or remain still.

Clear insight, right out of the box.

Air Quality Intelligence

Built-in air quality sensing continuously monitors eCO₂, VOCs, IAQ, and gas resistance, giving you real-time insight into the air you breathe. Changes in air quality are detected early, helping you respond before comfort or focus is affected.

For applications where absolute accuracy matters, an optional high-precision add-on enables true CO₂ measurements. This modular approach lets you start with meaningful air quality insight immediately and upgrade when needed.

Comfort, kept in balance.

Temperature & Humidity

Temperature and humidity are measured continuously to provide a clear picture of indoor comfort. These readings help identify conditions that feel too warm, too dry, or too humid often before you consciously notice them.

By understanding how temperature and humidity change throughout the day, automations can respond more intelligently, maintaining a stable and comfortable environment without constant manual adjustment.

Aware of light, indoors and out.

Light & UV Sensing

Integrated light and UV sensing measures ambient light levels (lux) and UV index, allowing the system to understand real-world lighting conditions in and around your home. This goes beyond simple on/off detection.

Lighting automations can respond naturally to daylight, cloud cover, and sun exposure enabling smarter behavior for lighting, shading, and energy efficiency based on actual conditions, not fixed schedules.

Clear signals, when you need them.

Physical Feedback

A built-in LED and buzzer provide immediate visual and audible feedback, offering clear confirmation when something changes. Whether it’s presence detection, air quality alerts, or system status, feedback is always direct and unambiguous.

All feedback behavior is fully controlled through Home Assistant automations, giving you complete control over when, how, and if the device communicates from subtle indicators to clear alerts.

Adapts to how and where you install it.

Modular by Design

Optional mounting add-ons enable flexible positioning. Choose a standard ball mount for flat wall surfaces, or a corner ball mount for clean installation in 90° wall corners.

Optional USB-C add-ons adapt the device to different installation scenarios. The device includes a standard USB-C port on the bottom for wall-mounted use with a cable. Use the male USB-C accessory for direct plug-in to a wall power adapter. Use the female USB-C accessory when placing the sensor upright on a shelf, TV cabinet, or other flat surface.

Every component chosen for accuracy, reliability and trust.

Engineered to Understand Your Home.

Powered by the ESP32-C6 microcontroller for reliable, always-on Zigbee operation.

  • 32-bit RISC-V single-core processor
  • Native 2.4 GHz IEEE 802.15.4 Zigbee connectivity
  • Connects to Home Assistant through a ZHA-compatible coordinator
  • Uses the supplied Sensy-One custom ZHA quirk
  • No WiFi credentials, cloud account, or ESPHome setup required
  • All sensor data and controls remain local
  • Does not operate as a Zigbee router or repeater
  • Zigbee2MQTT is not currently supported

Built around the Hi-Link LD2450 mmWave radar module to understand movement and position in real space.

  • Detection range adjustable from 20 cm to 6 m
  • Horizontal field of view up to 120°
  • Vertical field of view approximately 70°
  • Tracks up to 3 targets simultaneously
  • Position and distance shown in centimetres
  • Movement speed shown in centimetres per second
  • Home Assistant target updates every 0.5 seconds
  • Supports 3 polygon detection zones
  • Supports 1 polygon exclusion zone
  • Up to 8 points per polygon
  • Adjustable movement threshold and presence delay
  • Single-target and multi-target modes
  • Adjustable left/right target orientation
  • LD2450 Bluetooth control, disabled by default

Equipped with the Bosch BME688 environmental sensor for continuous air-quality awareness.

  • Equivalent CO2 values
  • Equivalent VOC values
  • Indoor Air Quality index
  • Human-readable IAQ accuracy
  • English IAQ classification
  • Gas resistance in kΩ
  • Temperature measurement
  • Humidity measurement
  • Air pressure measurement
  • Adjustable temperature offset

Equivalent CO2 and VOC are calculated estimates and not direct gas measurements.

Supports the optional Sensirion SCD40 sensor module for direct carbon-dioxide measurement.

  • True CO2 measurement using NDIR technology
  • Output range up to 40,000 ppm
  • Integrated temperature measurement
  • Integrated humidity measurement
  • Adjustable temperature offset
  • Configurable calibration reference
  • Forced calibration from Home Assistant
  • Factory-reset control
  • Connects directly to the S1 Pro PCB without soldering

Uses the Lite-On LTR-390 sensor to understand real-world lighting conditions.

  • Ambient light measurement in lux
  • Ultraviolet index measurement

Integrated visual and audible feedback controlled through Home Assistant.

  • Full-colour WS2812 RGB LED
  • Adjustable colour and brightness
  • MLT8530 piezo buzzer
  • LED and buzzer states remembered after restart
  • Purple breathing LED while Zigbee is disconnected
  • Stored LED state restored automatically after reconnection

Configure and visualize presence using the official Sensy-One Zone Editor.

  • Build interactive 2D and 3D floorplans
  • View live targets in 2D and 3D
  • Analyze movement using spatial heatmaps
  • Configure detection range
  • Draw 3 detection zones
  • Draw 1 exclusion zone
  • Save zone configuration directly to the S1 Pro

View add-on documentation

Powered via USB-C with a 5 V input.

  • Built for always-on operation
  • Supports optional USB-C accessories

Optional USB-C add-ons adapt the device to different installation scenarios.

  • Male USB-C accessory for direct plug-in to a wall power adapter
  • Female USB-C accessory for upright placement on a shelf, TV cabinet, or other flat surface

Custom enclosure optimized for reliable sensing and long-term operation.

  • Minimal mmWave signal interference
  • Optimized airflow across sensors
  • Passive cooling design
  • Resin-printed enclosure
  • Dimensions: 50 × 35 × 25 mm

Optional mounting add-ons enable flexible positioning.

  • Standard ball mount for mounting on flat wall surfaces
  • Corner ball mount for mounting in 90° wall corners

Everything needed to install, configure, and maintain the Zigbee edition.

  • Home Assistant ZHA installation
  • Custom quirk installation
  • Zigbee pairing and reset instructions
  • Sensy-One Zone Editor setup
  • Sensor calibration guidance
  • USB firmware updates and recovery

View Zigbee device documentation

Exactly what you need to get started.

  • S1 Pro Multi Sense PCB
  • S1 Pro Multi Sense enclosure
  • LD2450 mmWave sensor
  • ESD-safe packaging

* Optional add-ons sold separately.