Shelly Presence Gen4

Device identification

• Device name: Shelly Presence Gen4

• Device model: S4SN-0U61X

• Device SSID: ShellyPresence-XXXXXXXXXXXX

• BLE ID: 0x1821

Short description

Shelly Presence Gen4 is a presence sensor that uses mmWave radar to reliably detect people, even when they are sitting still. It enables more natural room automation by sensing actual presence rather than just motion.

It is designed for precise, room-aware automations with customizable detection behavior for both real rooms and open spaces. With up to 10 customized zones, you can tailor how the sensor reacts in different areas and fine-tune it to match your layout.

Shelly Presence Gen4 connects via Wi-Fi 6, Bluetooth 5 LE, and Zigbee 3.0, and it supports Matter-over-Wi-Fi. It integrates with Shelly Cloud, Home Assistant, and other popular platforms. You can also manage and monitor it through its own Embedded Web interface.

Main features

• Identifies up to 6 separate people simultaneously for realistic multi-occupant automations

• Supports up to 10 customized detection zones for more precise, area-specific automations

• Covers up to 42 m² to handle larger rooms and open areas

• Visualizes detected people on a map for clear, real-time understanding of the space

• Allows configurable transmission power and sensitivity, including advanced fine-tuning controls

• Provides filtering options to ignore near-ground movement and to avoid detecting small objects such as pets or robot vacuum cleaners

• Built-in light sensor that reports dark, twilight, and bright states for lighting-aware automations

• Operates via USB‑C (5 V) for continuous power

• Connects via Wi-Fi 6, Bluetooth 5 LE, and Zigbee 3.0, with Matter-over-Wi-Fi support

• Integrates with Shelly Cloud, Home Assistant, and other popular platforms

• Built-in Embedded Web interface for direct device access and configuration

Use cases

• Hands-Free Room Automation
  Enter a room and let Shelly Presence Gen4 instantly trigger the lights, AC, or music - no need for switches or voice commands.

• Zone-Based Smart Lighting
  Use multi-zone detection to light only the areas in use - perfect for large rooms, studios, or open-plan homes.

• Energy Efficiency in Empty Spaces
  Automatically turn off appliances and lights when no one is present, helping reduce energy costs and waste.

• Ambient Light-Aware Scenes
  Trigger different scenes based on light levels - like activating soft lighting during twilight or full brightness when it’s dark.

• True Presence Detection in Quiet Settings
  Ideal for bedrooms, offices, or meeting rooms where people remain still - detects presence even without motion.

• Privacy-Friendly Occupancy Awareness
  Monitor when and where people are present without using cameras - ideal for sensitive spaces like restrooms, bedrooms, or offices.

• Pet-Friendly Setup
  Avoid false triggers from pets or robot vacuums by adjusting the detection sensitivity to match only human movement.

Main applications

• Residential

• MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)…

• Light commercial (small office buildings, small retail/restaurant/gas station, etc.)…

• Government/municipal

• University/college

Integrations

Connectivity

• Wi-Fi

• Bluetooth

• Zigbee

• Matter

User interface

Inputs

• Button

  • Press 1 time: Checks device status and triggers the LED to display the current connection state.

  • Press 3 times rapidly: Enters Zigbee pairing mode, allowing the device to connect to a Zigbee network.

  • Press 5 times rapidly: Switches the device from Matter firmware (default) to Zigbee, or back.

  • Press and hold for 5 seconds: Performs a network reset. The LED flashes . If no action is taken within 3 minutes, the device retains its existing settings.

  • Press and hold for 10 seconds: Resets the device to factory settings.

Outputs

• LED indication

  • Blue light (slow flashing): Device is in AP mode.

  • Red light (slow flashing): STA mode is active, but the device is not connected to a Wi-Fi network.

  • Yellow light (slow flashing): STA mode is active, and the device is connected to a Wi-Fi network but not connected to the Shelly Cloud, or the Shelly Cloud is disabled.

  • Green light (slow flashing): STA mode is active, and the device is connected to both a Wi-Fi network and the Shelly Cloud.

  • White light (slow flashing): Presence is detected.

  • Purple light (slow flashing): Device is connected to a Zigbee network.

  • Flashing Purple light: Device is in Zigbee pairing mode.

  • Flashing Yellow light: Device is in identification mode, signaling its presence for user identification.

  • Flashing Red/Blue light: OTA update is in progress.

Specifications

Mounting

Shelly Presence Gen4 offers flexible mounting options for different environments. It comes pre-attached to a free-standing base with a built-in metal weight for added stability. The following mounting methods are recommended:

• With screws and wall plugs

1. Detach the mounting plate from the free-standing base by removing the two screws with a Phillips screwdriver.

2. Hold the mounting plate against the wall and mark the hole positions with a pencil.

3. Drill holes at the marked positions.

4. Insert the wall plugs and fix the mounting plate using the provided screws.

• With adhesive tape

1. Detach the mounting plate from the free-standing base by removing the two screws with a Phillips screwdriver.

2. Clean and dry the mounting surface.

3. Attach the double-sided adhesive tape to the back of the mounting plate.

4. Press the plate firmly against the surface for a few seconds.
   

• Flipped mounting

Flipped mounting adjusts the detection logic when you rotate the Device 180°. Use this feature when you mount the Device upside down to match the room layout or mounting height. This improves presence detection in specific installation setups. To activate it, enable Flipped mounting in the Device’s web interface or in the Shelly Smart Control app.

1. Detach the mounting plate from the free-standing base by removing the two screws with a Phillips screwdriver.

2. Rotate the Device 180°.

3. Reattach the mounting plate to the free-standing base and fix it with the two screws.
   

   

Placement and range

Shelly Presence Gen4 is intended for indoor use in spaces with maximum dimensions of 8 × 8 m (26 × 26 ft). Detection coverage may vary depending on the sensor’s horizontal and vertical placement within the room, as well as its tilt angle. The optimal installation height is 2 m (6.5 ft), with a maximum supported room height of 5 m (16.4 ft). The recommended tilt angle is approximately 15°.

The following placement configurations are advised:

• On a wall
  Position the sensor preferably at the horizontal center of a wall to ensure it utilizes its full 140‑degree detection field. The Device can be secured using the adhesive tape or mounted with the screws.

• On a horizontal surface
  When using the device with its free-standing base, it may be positioned on furniture of sufficient height to ensure proper operational coverage. A flipped mounting setup works well for this application.

• In a corner (left or right)
  Use this configuration for smaller spaces, as this placement limits the detection field to 7 × 7 m (23 × 23 ft) and reduces the detection range to 90°. The recommended placement angle is 45° of the sensor center relative to each wall.

Corner mount bracket

For corner mounting, you can download and print the corner bracket STL file below:

https://www.thingiverse.com/thing:7159207

Matter

If you use the device with a Matter-compatible home automation system, only one room zone will be visible in its interface by default. You can have up to a maximum of ten zones. Each newly added zone will appear as a separate component.

Find more information on how to enable the Matter feature and add room zones here: https://kb.shelly.cloud/knowledge-base/shelly-smart-control-guide https://kb.shelly.cloud/knowledge-base/web-interface-guides

Components and APIs

• This device

• All Shelly devices and services

Compliance

• Shelly Presence Gen4 UK PSTI ACT statement of compliance 276 2026-03-26.pdf

• Shelly Presence Gen4 UKCA declaration of conformity 276 2026-03-26.pdf

• Shelly Presence Gen4 multilingual EU declaration of conformity 276 2026-03-26.pdf

Printed user guide

• Shelly Presence Gen4 multilingual printed user and safety guide.pdf