Door sensor BroadLink DS4‑FC with S3 Hub — wireless smart door/window sensor, open/close detection

BroadLink DS4‑FC with S3 Hub is a wireless smart door/window sensor designed to detect open and closed states and integrate with home automation via the included S3 hub. The sensor reports status changes to the hub so you can receive real‑time alerts, monitor entries remotely and trigger automation scenarios. Supplied as a paired solution with the S3 hub, the DS4‑FC enables communication with other smart devices in the same system and supports straightforward installation on doors, windows or small access panels.

Advantages

The DS4‑FC provides reliable magnetic contact detection for open/close monitoring and transmits state changes through the S3 hub for centralized control. Its wireless design simplifies placement without running wires, while the bundled S3 hub handles device communication and integrates the sensor into automation routines. The compact form factor allows installation on a variety of frame types and the sensor supports remote notifications and status checks when connected to the hub.

Suitable for

• Monitoring external and internal doors for open/close status
• Securing windows and glass doors against unexpected opening
• Protecting cabinets, cupboards or server racks
• Triggering home automation scenes based on door/window state

Key specifications

• Wireless communication via included S3 hub for integration into BroadLink home automation
• Magnetic contact sensor for open/close detection
• Compact physical design suitable for installation on doors, windows and small panels
• Real‑time status reporting to the hub for notifications and automation
• Battery‑powered sensor for cable-free placement

How to use

Install the magnetic sensor and magnet on matching surfaces of the door and frame or on the window and its sash so that they align when closed. Mount the sensor and magnet using the recommended adhesive or screws depending on the surface; ensure the gap between the two parts is within the manufacturer’s alignment tolerance for reliable detection. Power the sensor with the supplied or specified battery and add the device to the S3 hub following the hub’s device pairing procedure. After pairing, configure notifications and automation rules in the BroadLink app or hub interface to receive alerts and trigger connected devices based on open/close events.

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The sensor performs best when mounted on clean, dry surfaces with proper alignment of the sensor and magnet; test the open/close detection after installation and periodically check battery level and secure attachment.